2010 Acura Truck MDX V6-3.7L Page 146

Is there battery voltage?

YES -

Replace the power tailgate left pinch sensor.?

NO -

Go to step 10.

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

11. Disconnect power tailgate control unit connector B (20P).

12. Check for continuity between power tailgate control unit connector B (20P) terminal No. 16 and power tailgate left pinch sensor 2P

connector terminal No. 2.

Is there continuity?

YES -

Go to step 13.

NO -

Repair an open in the wire.?

13. Check for continuity between power tailgate control unit connector B (20P) terminal No. 17 and power tailgate left pinch sensor 2P

connector terminal No. 1.

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 184

NO -

Repair an open in the wire between the cable reel and the audio-navigation unit.?

With Navigation

DTC Troubleshooting: B1780

DTC B1780:

HandsFreeLink steering wheel switch line short (with navigation)

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. Connect the HDS to the DLC.

2. Clear the DTCs with the HDS.

3. Turn the ignition switch to LOCK (0), then start the engine and turn the steering wheel from lock to lock several times.

4. Check for DTCs with the HDS.

Is DTC B1780 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. Do the HFL switch test See: Accessories and Optional Equipment/Cellular Phone/Testing and Inspection/Component Tests and General

Diagnostics/HFL Switch Test.

Is the switch OK?

YES -

Go to step 7.

NO -

Replace the HFL-navigation voice control switch See: Accessories and Optional Equipment/Sensors and Switches - Accessories and Optional

Equipment/Voice Activation Switch/Service and Repair.?

7. Disconnect the HandsFreeLink control unit 28P connector.

8. Disconnect the cable reel subharness 20P connector from the cable reel.

9. Check for continuity between HandsFreeLink control unit 28P connector terminal No. 2 and body ground.

2010 Acura Truck MDX V6-3.7L Page 264

1. Clear the DTCs with the HDS.

2. Lock and unlock the driver's door with the driver's door lock switch.

3. Check for DTCs with the HDS.

Is DTC B2180 indicated?

YES -

Go to step 4.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections between the driver's MPCS unit and the driver's door lock

switch.?

4. With the driver's door lock switch in the neutral position, select the DOOR LOCK from the BODY ELECTRICAL SYSTEM SELECT

menu, and enter the DATA LIST.

5. Check the ON/OFF Information of the Driver's Door Lock Switch (LOCK) and Driver's Door Lock Switch (UNLOCK).

Are both information indicators OFF?

YES -

Go to step 6.

NO -

Go to step 7.

6. Operate the driver's door lock switch in the LOCK and UNLOCK positions, and check the ON/OFF information of the Driver's Door Lock

Switch (LOCK) and Driver's Door LOCK Switch (UNLOCK).

Are both Driver's Door LOCK Switch (LOCK) and Driver's Door LOCK Switch (UNLOCK) information indicators ON at the same time when the

door lock switch is in the LOCK or UNLOCK position?

YES -

Do the door lock switch test See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Keyless Entry/Testing and

Inspection/Component Tests and General Diagnostics/Power Door Lock Switch Test. If the switch is OK, repair a short between the wires.?

NO -

Replace the driver's MPCS unit.?

7. Disconnect the driver's door lock switch 5P connector.

8. Check the ON/OFF information of the Driver's Door Lock Switch (LOCK) and Driver's Door Lock Switch (UNLOCK).

Are both information indicators OFF?

YES -

Faulty driver's door lock switch.?

NO -

Go to step 9.

9. Disconnect driver's MPCS unit connector A (40P).

10. Check for continuity between body ground and driver's door lock switch 5P connector terminals No. 3 and No. 4 individually.

2010 Acura Truck MDX V6-3.7L Page 120

NO -

Go to step 12.

12. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector B (14P) terminal No. 5 and body ground.

Is there any voltage?

YES -

Repair a short to power in the wire between the climate control unit and the rear air mix control motor. This short may also damage the climate

control unit. Repair a short to power before replacing the climate control unit.?

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.?

13. Turn the ignition switch to LOCK (0), and disconnect climate control unit connector A (40P).

14. Disconnect these items:

- Driver's air mix control motor

- Passenger's air mix control motor

- Rear air mix control motor

- Humidity/in-car temperature sensor

- A/C pressure sensor

15. Check for continuity between climate control unit connector A (40P) terminal No. 6 and body ground.

Is there continuity?

YES -

Repair a short to body ground in the wire.?

NO -

Go to step 16.

16. Turn the ignition switch to ON (II), and measure the voltage between the same terminal and body ground.

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 92

Check for loose wires or poor connections at climate control unit connector A (40P) and at the humidity/in-car temperature sensor 4P connector.

If the connections are good, 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.?

NO -

Repair an open in the wire between the climate control unit and the in-car temperature sensor.?

B1226

DTC Troubleshooting: B1226 (B and AUTO)

DTC B1226 or DTC indicator B and AUTO:

A Short in the In-Car 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 B1226 or B and AUTO indicated?

YES -

Go to step 5.

NO -

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.?