2010 Acura Truck MDX V6-3.7L Page 240

Intermittent failure, the system is OK at this time. Check for loose or poor connections between the immobilizer-keyless control unit and the gauge

control module.?

5. Check for DTCs with the HDS.

Are DTCs B1061, B1359, B1808, B1956, and U0155 also indicated?

YES -

Do the gauge control module input test See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Component Tests and

General Diagnostics/Gauge Control Module Input Test.?

NO -

Do the immobilizer-keyless control unit input test See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Testing and

Inspection/Component Tests and General Diagnostics/Immobilizer-Keyless Control Unit Input Test.?

B1950

DTC Troubleshooting: B1050, B1200, B1250, B1150, B1750, B1900, B1950, B2150, B1800, B1350

DTC B1050:

Communication Circuit Error (BUS-OFF)

DTC B1150:

Communication Circuit Error (BUS-OFF)

DTC B1200:

Communication Circuit Error (BUS-OFF)

DTC B1250:

Communication Circuit Error (BUS-OFF)

DTC B1350:

Communication Circuit Error (BUS-OFF)

DTC B1800:

Communication Circuit Error (BUS-OFF)

DTC B1900:

Communication Circuit Error (BUS-OFF)

DTC B1950:

Communication Circuit Error (BUS-OFF)

DTC B2150:

Communication Circuit Error (BUS-OFF)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A See: Powertrain

Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting

- B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back ON (II).

3. Wait for more than 6 seconds.

4. Check for DTCs with the HDS.

Are DTCs B1050, B1150, B1200, B1250, B1350, B1800, B1900, B1950, and/or B2150 indicated?

2010 Acura Truck MDX V6-3.7L Page 80

Intermittent failure, check for loose wires or poor connections in the climate control unit connector A (40P).?

6. Check for DTCs using the HDS.

Are any of the following DTCs indicated; B1011, B1060,B2160, B1357, B1805, B1408, or B2157?

YES -

Do the gauge control module input test See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Component Tests and

General Diagnostics/Gauge Control Module Input Test.?

NO -

Do the climate control unit troubleshooting See: Heating and Air Conditioning/Control Assembly/Testing and Inspection.?

B1213

DTC Troubleshooting: B1213 (N)

DTC B1213 or DTC indicator N and Mode:

An Open in the Rear Evaporator Temperature Sensor Circuit

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Do the self-diagnostic function with the HDS or the climate control unit.

4. Check for DTCs.

Is DTC B1213 or N and Mode indicated?

YES -

Go to step 5.

NO -

Intermittent failure, check for loose wires or poor connections in the rear evaporator temperature sensor circuit.?

5. Turn the ignition switch to LOCK (0).

6. Remove the rear evaporator temperature sensor See: Heating and Air Conditioning/Evaporator Temperature Sensor / Switch/Service and

Repair/Rear Evaporator Temperature Sensor Replacement, and test it See: Heating and Air Conditioning/Testing and Inspection/Component

Tests and General Diagnostics/Rear Evaporator Temperature Sensor Test.

Is the rear evaporator temperature sensor OK?

YES -

With the rear evaporator temperature sensor disconnected, go to step 7.

NO -

Replace the rear evaporator temperature sensor See: Heating and Air Conditioning/Evaporator Temperature Sensor / Switch/Service and

Repair/Rear Evaporator Temperature Sensor Replacement.?

7. Disconnect climate control unit connector B (14P).

8. Check for continuity between climate control unit connector B (14P) terminal No. 6 and rear evaporator temperature sensor 2P connector

2010 Acura Truck MDX V6-3.7L Page 36

Intermittent failure, the system is OK at this time. Check for loose or poor connections.?

5. Check for DTCs with the HDS.

Is DTC B1011 also indicated with DTC B1032?

YES -

Check for an open in the wire between the MICU and the gauge control module. If the circuit is faulty, repair the open.?

NO -

Do the gauge control module input test See: Instrument Panel, Gauges and Warning Indicators/Testing and Inspection/Component Tests and

General Diagnostics/Gauge Control Module Input Test.?

B1050

DTC Troubleshooting: B1050, B1200, B1250, B1150, B1750, B1900, B1950, B2150, B1800, B1350

DTC B1050:

Communication Circuit Error (BUS-OFF)

DTC B1150:

Communication Circuit Error (BUS-OFF)

DTC B1200:

Communication Circuit Error (BUS-OFF)

DTC B1250:

Communication Circuit Error (BUS-OFF)

DTC B1350:

Communication Circuit Error (BUS-OFF)

DTC B1800:

Communication Circuit Error (BUS-OFF)

DTC B1900:

Communication Circuit Error (BUS-OFF)

DTC B1950:

Communication Circuit Error (BUS-OFF)

DTC B2150:

Communication Circuit Error (BUS-OFF)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A See: Powertrain

Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting

- B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back ON (II).

3. Wait for more than 6 seconds.

4. Check for DTCs with the HDS.

Are DTCs B1050, B1150, B1200, B1250, B1350, B1800, B1900, B1950, and/or B2150 indicated?

2010 Acura Truck MDX V6-3.7L Page 38

Intermittent failure, the system is OK at this time.?

B1052

DTC Troubleshooting: B1051, B1052

DTC B1051:

Relay Control Module Internal Error (CPU error)

DTC B1052:

Relay Control Module Internal Error (EEPROM error)

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1051 or B1052 indicated?

YES -

Faulty relay control module, replace the under-hood fuse/relay box See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service and

Repair/Under-Hood Fuse/Relay Box Removal and Installation.?

NO -

Intermittent failure, the system is OK at this time.?

B1055

DTC Troubleshooting: B1055, B1056, B1057

DTC B1055:

Relay Control Module Lost Communication with MICU (MICU Message)

DTC B1056:

Relay Control Module Lost Communication with MICU (ALARM Message)

DTC B1057:

Relay Control Module Lost Communication with MICU (DOORSW Message)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A See: Powertrain

Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting

- B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1055, B1056, or B1057 indicated?

2010 Acura Truck MDX V6-3.7L Page 26

Intermittent failure, the system is OK at this time.?

4. Turn the ignition switch to LOCK (0).

5. Disconnect the right BSI alert indicator 2P connector.

6. Measure the resistance between right BSI alert indicator 2P connector terminal No. 1 and body ground. There should be less than 1.0 Ohms.

Is the resistance as specified?

YES -

Go to step 7.

NO -

Repair an open in the wire between the right BSI alert indicator and body ground (G507).?

7. Turn the ignition switch to ON (II), and within 3 seconds measure the voltage between right BSI alert indicator 2P connector terminals No. 1

and No. 2.

Does the voltage remain between 12 V and 1 V for 3 seconds after turning the ignition switch to ON (II), then go down to 0 V?

YES -

Replace the right BSI alert indicator.?

NO -

Go to step 8.

8. Turn the ignition switch to LOCK (0).

9. Disconnect the BSI control unit 16P connector.

10. Measure the resistance between right BSI alert indicator 2P connector terminal No. 2 and body ground. There should be an open circuit or at

2010 Acura Truck MDX V6-3.7L Page 39

Intermittent failure, the system is OK at this time. Check for loose or poor connection between the relay control module and the MICU.?

5. Check for DTCs with the HDS.

Are DTCs B1055, B1056, B1057, B1157, B1159, B1255, B1355, B1806, B1811, B1955, B2155, and B2161 all indicated?

YES -

Do the MICU input test See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests

and General Diagnostics/MICU Input Test.?

NO -

Do the relay control module input test See: Power and Ground Distribution/Testing and Inspection/Relay Control Module Input Test.?

B1056

DTC Troubleshooting: B1055, B1056, B1057

DTC B1055:

Relay Control Module Lost Communication with MICU (MICU Message)

DTC B1056:

Relay Control Module Lost Communication with MICU (ALARM Message)

DTC B1057:

Relay Control Module Lost Communication with MICU (DOORSW Message)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A See: Powertrain

Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting

- B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1055, B1056, or B1057 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connection between the relay control module and the MICU.?

5. Check for DTCs with the HDS.

Are DTCs B1055, B1056, B1057, B1157, B1159, B1255, B1355, B1806, B1811, B1955, B2155, and B2161 all indicated?

YES -

Do the MICU input test See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests

and General Diagnostics/MICU Input Test.?

NO -

Do the relay control module input test See: Power and Ground Distribution/Testing and Inspection/Relay Control Module Input Test.?

B1057

DTC Troubleshooting: B1055, B1056, B1057

2010 Acura Truck MDX V6-3.7L Page 244

Intermittent failure, the system is OK at this time. Check for loose or poor connections between the rear MICU and the combination switch control

unit.?

5. Check for DTCs with the HDS.

Are DTCs B1007, B1062, B1063, B1155, B1156, B1957, B1958, and/or B2969 all indicated?

YES -

Do the combination switch control unit input test See: Wiper and Washer Systems/Testing and Inspection/Wiper/Washer Switch (Combination

Switch Control Unit) Input Test.?

NO -

Do the rear MICU input test See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component

Tests and General Diagnostics/Rear MICU Input Test.?

B1959

DTC Troubleshooting: B1959

DTC B1959:

Rear MICU Lost Communication with Relay Control Module (RM Message)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A See: Powertrain

Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting

- B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Wait for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1959 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections between the rear MICU and the relay control module.?

5. Check for DTCs with the HDS.

Are DTCs B1005, B1158, B1959, B2162, and/or B2970 all indicated?

YES -

Do the relay control module input test See: Power and Ground Distribution/Testing and Inspection/Relay Control Module Input Test.?

NO -

Do the rear MICU input test See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component

Tests and General Diagnostics/Rear MICU Input Test.?

B2150

DTC Troubleshooting: B1050, B1200, B1250, B1150, B1750, B1900, B1950, B2150, B1800, B1350

DTC B1050:

Communication Circuit Error (BUS-OFF)

DTC B1150:

Communication Circuit Error (BUS-OFF)

2010 Acura Truck MDX V6-3.7L Page 238

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.?

4. Turn the ignition switch to LOCK (0).

5. Disconnect the negative cable from the battery, then wait at least 3 minutes.

6. Remove the glove box See: Body and Frame/Interior Moulding / Trim/Glove Compartment/Service and Repair, then disconnect the

dashboard wire harness 4P connector (A) from the front passenger's airbag.

7. Connect the SRS inflator simulator (2 Ohms connectors) and simulator lead J to the dashboard wire harness 4P connector.

8. Reconnect the negative cable to the battery.

9. Clear the DTCs with the HDS.

10. Check for DTCs with the HDS.

Is DTC 12-9x or 12-Bx indicated?

YES -

Go to step 11.

NO -

Short to ground in the front passenger's airbag first or second inflator; replace the front passenger's airbag See: Restraints and Safety Systems/Air

Bag Systems/Air Bag/Service and Repair/Removal and Replacement/Front Passenger's Airbag Replacement, then clear the DTC.?

11. Turn the ignition switch to LOCK (0).

12. Disconnect the negative cable from the battery, then wait at least 3 minutes.

13. Disconnect SRS unit connector A (39P) from the SRS unit.

14. Disconnect the SRS inflator simulator from the SRS simulator lead. Do not disconnect the simulator lead from the dashboard wire harness 4P

connector.

15. Measure the resistance between body ground and each terminals of both SRS simulator leads individually. There should be an open circuit or

2010 Acura Truck MDX V6-3.7L Page 747

Intermittent failure, the system is OK at this time. Check for loose terminals between the yaw rate-lateral/longitudinal acceleration sensor 4P

connector, and the VSA modulator-control unit 47P connector. Refer to intermittent failures troubleshooting.?

11. Turn the ignition switch to LOCK (0).

12. Substitute a known-good yaw rate-lateral/longitudinal acceleration sensor See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair.

13. Turn the ignition switch to ON (II).

14. Clear the DTC with the HDS.

15. Test-drive the vehicle around a number of corners.

NOTE: Drive the vehicle on the road, not on a lift.

16. Check for DTCs with the HDS.

Is DTC 132, 133, 135, or 136 indicated?

YES -

Go to step 17.

NO -

Replace the original yaw rate-lateral/longitudinal acceleration sensor See: Brakes and Traction Control/Antilock Brakes / Traction Control

Systems/Yaw Rate Sensor/Service and Repair.?

17. Update the VSA modulator-control unit if it does not have the latest software See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Traction Control Module/Testing and Inspection. If the unit already has the latest software, substitute a known-good VSA

modulator-control unit See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Traction Control Module/Service and

Repair.

18. Test-drive the vehicle around a number of corners.

NOTE: Drive the vehicle on the road, not on a lift.

19. Check for DTCs with the HDS.

Is DTC 132, 133, 135, or 136 indicated?

YES -

Check for loose terminals in the VSA modulator-control unit 46P connector. Check for a loose connection at G303. If the VSA modulator-control

unit was updated, substitute a known-good VSA modulator-control unit See: Brakes and Traction Control/Antilock Brakes / Traction Control

Systems/Traction Control Module/Service and Repair, then retest. If the VSA modulator-control unit was substituted, go to step 1.

NO -

If the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the

original VSA modulator-control unit See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Traction Control

Module/Service and Repair. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.?

136

VSA DTC Troubleshooting: 132, 133, 135, 136

DTC 132:

Lateral Acceleration Sensor Malfunction

DTC 133:

Lateral Acceleration Sensor Malfunction (Installation Error)

DTC 135:

Longitudinal Acceleration Sensor Malfunction

2010 Acura Truck MDX V6-3.7L Page 387

Intermittent failure, the system is OK at this time. Check for loose or poor connections.?

NO -

Go to step 3.

3. Press the brake pedal.

4. Watch the ACC indicator.

Does the ACC indicator go off?

YES -

Intermittent failure, the system is OK at this time. Check for loose or poor connections.?

NO -

Go to step 5.

5. Check for DTCs with the HDS.

Is DTC 34, 35, or 36 indicated?

YES -

Go to step 6.

NO -

Troubleshoot the indicated DTC(s).?

6. With the brake pedal released, check the master cylinder brake fluid pressure voltage (BRAKE P) with the HDS.

Is there about 0.5 V?

YES -

Go to step 7.

NO -

Check the VSA system.?

7. Test the brake booster See: Brakes and Traction Control/Power Brake Assist/Vacuum Brake Booster/Testing and Inspection.

8. Start the engine, then press the brake pedal with about 314 N (32 kgf, 70.6 lbf) pressure.

9. Check the master cylinder brake fluid pressure voltage (BRAKE P) with the HDS.

Is there about 2.5 V?

YES -

Go to step 10.

NO -

Check the VSA system.?

10. Check the brake switch signal (BRAKE SW (N.O.)) with the HDS.

Does the indication show ON when the brake pedal is pressed, and show OFF when the brake pedal is released?

YES -

Check for loose or poor connections. If OK, update the ACC unit See: Cruise Control/Testing and Inspection/Programming and Relearning, then

recheck. If the ACC unit was already updated, replace the ACC unit See: Cruise Control/Cruise Control Module/Service and Repair.?

NO -

Go to step 11.

11. Check for DTCs with the HDS.

2010 Acura Truck MDX V6-3.7L Page 569

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.?

57-1

SH AWD DTC Troubleshooting: 57-1, 57-3

DTC 57-1, 57-3:

Right Clutch Electromagnetic Coil (Open)

NOTE: Before you troubleshoot, review the general troubleshooting information See: Transmission and Drivetrain/Differential Assembly/Testing

and Inspection/Initial Inspection and Diagnostic Overview.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Do the clutch function test with the HDS See: Transmission and Drivetrain/Differential Assembly/Testing and Inspection/Component Tests

and General Diagnostics.

4. Check for DTCs with the HDS.

Is DTC 57-1 or 57-3 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time.?

5. Turn the ignition switch to LOCK (0).

6. Disconnect SH-AWD control unit connector B (8P) and the right solenoid 4P connector.

7. Connect right solenoid 4P connector terminal No. 1 to body ground with a jumper wire.

8. Check for continuity between SH-AWD control unit connector terminal B7 and body ground.

2010 Acura Truck MDX V6-3.7L Page 122

Intermittent failure, the system is OK at this time. Check for poor or loose connections between the suspension stroke sensor and the active

damper control unit.?

6. Turn the ignition switch to LOCK (0).

7. Disconnect active damper control unit connector B (14P) See: Relays and Modules/Relays and Modules - Steering and Suspension/Relays

and Modules - Suspension/Suspension Control Module/Service and Repair.

8. Disconnect the headlight leveling control unit 16P connector See: Lighting and Horns/Headlamp/Headlamp Alignment Control

Module/Testing and Inspection.

9. Turn the ignition switch to ON (II).

10. Measure the voltage between body ground and active damper control unit connector B (14P) terminal No. 7.

Is there more than 0.5 V?

YES -

Repair a short to power in the wire between the left-rear suspension stroke sensor, the headlight leveling control unit, and the active damper control

unit, then go to step 17.

NO -

Go to step 11.

11. Turn the ignition switch to LOCK (0).

12. Disconnect active damper control unit connector B (14P) See: Relays and Modules/Relays and Modules - Steering and Suspension/Relays

and Modules - Suspension/Suspension Control Module/Service and Repair.

13. Disconnect the left-rear suspension stroke sensor 3P connector.

14. Check for continuity between left-rear suspension stroke sensor 3P connector terminals No. 1 and No. 2.

Is there continuity?

YES -

Repair a short in the wires between the left-rear suspension stroke sensor and the active damper control unit.?

NO -

Go to step 15.

15. Check for continuity between headlight leveling control unit 16P connector terminal No. 4 and left-rear suspension stroke sensor 3P

connector terminal No. 3.

2010 Acura Truck MDX V6-3.7L Page 15

Intermittent failure, check for loose wires or poor connections in the in-car temperature sensor circuit.?

5. Turn the ignition switch to LOCK (0).

6. Remove the humidity/in-car temperature sensor See: Heating and Air Conditioning/Cabin Temperature Sensor / Switch/Service and Repair,

and test it.

Is the in-car temperature sensor OK?

YES -

With the humidity/in-car temperature sensor disconnected, go to step 7.

NO -

Replace the humidity/in-car temperature sensor See: Heating and Air Conditioning/Cabin Temperature Sensor / Switch/Service and Repair.?

7. Disconnect climate control unit connector A (40P).

8. Check for continuity between climate control unit connector A (40P) terminal No. 5 and body ground.

Is there continuity?

YES -

Repair a short to body ground in the wire between the climate control unit and the in-car temperature sensor.?

NO -

Go to step 9.

9. Check for continuity between climate control unit connector A (40P) terminals No. 5 and No. 8.

Is there continuity?

YES -

Repair a short in the wires between the climate control unit and the in-car temperature sensor.?

NO -

Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit See:

Heating and Air Conditioning/Control Assembly/Service and Repair/Climate Control Unit Removal/Installation.?

B and Mode

DTC Troubleshooting: B1240 (B and MODE)

DTC B1240 or DTC indicator B and MODE:

2010 Acura Truck MDX V6-3.7L Page 339

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.?

4. Turn the ignition switch to LOCK (0).

5. Disconnect the negative cable from the battery, then wait at least 3 minutes.

6. Disconnect the floor wire harness 2P connector (A) from the driver's side airbag (B).

7. Connect the SRS inflator simulator (2 Ohms connectors) and simulator lead L to the floor wire harness.

8. Reconnect the negative cable to the battery.

9. Clear the DTCs with the HDS.

10. Check for DTCs with the HDS.

Is DTC 31-9x indicated?

YES -

Go to step 11.

NO -

Short to ground in the driver's side airbag inflator; replace the driver's side airbag See: Restraints and Safety Systems/Air Bag Systems/Air

Bag/Service and Repair/Removal and Replacement/Side Airbag Replacement, then clear the DTC.?

11. Turn the ignition switch to LOCK (0).

12. Disconnect the negative cable from the battery, then wait at least 3 minutes.

13. Disconnect SRS unit connector B (39P) from the SRS unit.

14. Disconnect the SRS inflator simulator from the SRS simulator lead. Do not disconnect the simulator lead from the floor wire harness 2P

connector.

15. Measure the resistance between body ground and each terminals of the black SRS simulator lead (A) individually. There should be an open

circuit or at least 1 MOhms.

2010 Acura Truck MDX V6-3.7L Page 545

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.?

56-3

SH AWD DTC Troubleshooting: 56-3

DTC 56-3:

Right Clutch Electromagnetic Coil Current Malfunction

NOTE:

- Before you troubleshoot, review the general troubleshooting information See: Transmission and Drivetrain/Differential Assembly/Testing

and Inspection/Initial Inspection and Diagnostic Overview.

- If DTC 49-1 is stored at the same time as DTC 56-3, troubleshoot DTC 49-1 first, then recheck for DTC 56-3.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Do the clutch function test with the HDS See: Transmission and Drivetrain/Differential Assembly/Testing and Inspection/Component Tests

and General Diagnostics.

4. Check for DTCs with the HDS.

Is DTC 56-3 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time.?

5. Turn the ignition switch to LOCK (0).

6. Disconnect SH-AWD control unit connector B (8P) and the right solenoid 4P connector.

7. Connect right solenoid 4P connector terminal No. 1 to body ground with a jumper wire.

8. Check for continuity between SH-AWD control unit connector terminal B7 and body ground.

2010 Acura Truck MDX V6-3.7L Page 300

Intermittent failure, the system is OK at this time. Check for loose or poor connections.?

5. Check for DTCs with the HDS.

Is DTC 21 or DTC 22 indicated?

YES -

Go to step 6.

NO -

Troubleshoot the indicated DTC(s).?

6. With the vehicle parked on level ground, check the YAW RATE SENSOR with the HDS.

Is about 2.5 V indicated?

YES -

The yaw rate-lateral/longitudinal acceleration sensor signal is OK, check for loose or poor connections. If OK, replace the ACC unit See: Cruise

Control/Cruise Control Module/Service and Repair.?

NO -

Go to the VSA system troubleshooting See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Testing and

Inspection/Reading and Clearing Diagnostic Trouble Codes.?

TPMS System

TPMS DTC Troubleshooting: 21, 22, 23, 24

DTC 21, 22, 23, 24:

Tire Pressure Sensor Abnormally High Temperature

1. Turn the ignition switch to ON (II).

2. Check the tire indicated by the DTCs you retrieved.

NOTE: An abnormal rise in the internal temperature of the tires can be caused by:

- Excessive braking

- Failure to release the parking brake (rear tires only)

- Leaving the vehicle running while parked

- Improper assembly of a wheel and tire

3. Turn the ignition switch to LOCK (0).

4. Make sure the tires have cooled down.

5. Turn the ignition switch to ON (II).

Does the TPMS indicator go off within one minute?

YES -

The system is OK at this time. Clear the DTC with the HDS.?

NO -

Go to step 6.

6. Check the RF, LF, RR, or LR TIRE PRESSURE SENSOR TEMPERATURE in the TPMS DATA LIST with the HDS.

NOTE: If the HDS screen shows UNDEFINED for sensor status, turn the ignition switch to LOCK (0), rotate the tire 1/4 turn, then turn the ignition

2010 Acura Truck MDX V6-3.7L Page 519

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.?

52-3

SH AWD DTC Troubleshooting: 52-3

DTC 52-3:

Left Clutch Electromagnetic Coil Current Malfunction

NOTE:

- Before you troubleshoot, review the general troubleshooting information See: Transmission and Drivetrain/Differential Assembly/Testing

and Inspection/Initial Inspection and Diagnostic Overview.

- If DTC 49-1 is stored at the same time as DTC 52-3, troubleshoot DTC 49-1 first, then recheck for DTC 52-3.

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Do the clutch function test with the HDS See: Transmission and Drivetrain/Differential Assembly/Testing and Inspection/Component Tests

and General Diagnostics.

4. Check for DTCs with the HDS.

Is DTC 52-3 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time.?

5. Turn the ignition switch to LOCK (0).

6. Disconnect SH-AWD control unit connector B (8P) and the left solenoid 4P connector.

7. Connect left solenoid 4P connector terminal No. 1 to body ground with a jumper wire.

8. Check for continuity between SH-AWD control unit connector terminal B5 and body ground.