2010 Acura Truck MDX V6-3.7L Page 248

4. Check for DTCs with the HDS.

Are DTCs B2155, B2156, and/or B2161 indicated?

YES -

Go to step 5.

NO -

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

5. Check for DTCs with the HDS.

Are DTCs B1055, B1057, B1157, B1159, B1255, B1355, B1806, B1810, B1811, and/or B1955 also indicated?

YES -

Faulty MICU, replace the under-dash fuse/relay box See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service and Repair/Under-Dash

Fuse/Relay Box Removal and Installation.?

NO -

Do the driver's MPCS unit input test See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and

Inspection/Component Tests and General Diagnostics/Drivers MPCS Unit Input Test.?

B2157

DTC Troubleshooting: B2157, B2160

DTC B2157:

Driver's MPCS Unit Lost Communication with Gauge Control Module (ILLUMI Message)

DTC B2160:

Driver's MPCS Unit Lost Communication with Gauge Control Module (VSP/NE 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.

Are DTCs B2157 and/or B2160 indicated?

YES -

Go to step 5.

NO -

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

module.?

5. Check for DTCs with the HDS.

Are DTCs B1011, B1060, B1205, B1207, B1357, B1805, and/or 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 driver's MPCS unit input test See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and

2010 Acura Truck MDX V6-3.7L Page 217

YES -

Go to step 11.

NO -

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

11. Check for DTCs with the HDS.

Are any DTCs other than B1837 indicated?

YES -

Go to the indicated DTC's troubleshooting.?

NO -

Go to step 12.

12. Clear the DTCs with the HDS, and wait for 6 seconds.

13. Move the motors shown one at a time, and check the operation time.

- Steering tilt motor up and down

- Steering telescopic motor pulled and pushed

- Power mirror actuator (up, down, left, right)

- Power seat (slide forward/backward, recline forward/backward, front up-down, rear up-down)

Does any motor fail to run smoothly?

YES -

Go to the failed motor test:

- Power tilt/telescopic motor test See: Steering and Suspension/Steering/Steering Column/Tilt Wheel Motor/Testing and Inspection.

- Power mirror actuator test See: Body and Frame/Mirrors/Testing and Inspection/Power Mirror Actuator Test.

- Power seat motor test See: Body and Frame/Seats/Power Seat Motor/Testing and Inspection/Driver's Power Seat Motor Test.

If the motor is OK, check the engagement of the motor gear.?

NO -

Go to the each input test:

- Power seat control unit input test See: Body and Frame/Relays and Modules - Body and Frame/Power Seat Control Module/Testing and

- PInoswpecr ttiioltn//tPeloewsceorp Sice astt eCeorinntgro cl oUnntriot lI nupnuitt iTnepsutt. ?test See: Relays and Modules/Relays and Modules - Steering and Suspension/Relays and

- DMroivdeurl'ess M - PSCteSer uinngit/ Sintepeurti ntegs Ct oSleuem: nP oCwoenrttrroali nM Modaunlaeg/Temesetnint/gC aonmd pIuntsepresc atinodn C.?ontrol Systems/Information Bus/Testing and

Inspection/Component Tests and General Diagnostics/Power Windows (Drivers MPCS Unit) Input Test.?

B1840

DTC Troubleshooting: B1840

DTC B1840:

Tilt Motor Pulse Error

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. Operate the tilt switch in each direction for at least 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1840 indicated?

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 211

With seat ventilation

Is there continuity?

YES -

Go to step 30.

NO -

Repair an open in the wire.?

30. Check for continuity between body ground and driver's seat wire harness 8P [14P] connector terminals No. 4 [No. 8] and No. 5 [No. 9]

individually.

[ ]: With seat ventilation

Without seat ventilation

2010 Acura Truck MDX V6-3.7L Page 286

Is there continuity?

YES -

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(s) between the climate control unit and the humidity sensor.?

B2968

DTC Troubleshooting: B2968 (A and WINDSHIELD DEFROST)

DTC B2968 or DTC indicator A and WINDSHIELD DEFROST:

A Short in the Humidity 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 B2968 or A and WINDSHIELD DEFROST indicated?

YES -

Go to step 5.

NO -

Intermittent failure.?

5. Check for DTCs.

Are these DTCs also present; B1234 or K and AUTO, and/or B1237 or N and AUTO, and/or B1245 or G, and/or B2980 or B and WINDSHIELD

DEFROST?

YES -

Go to step 13.

NO -

Go to step 6.

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

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

and test it See: Heating and Air Conditioning/Testing and Inspection/Component Tests and General Diagnostics/Humidity/In-Car

2010 Acura Truck MDX V6-3.7L Page 268

Is there continuity?

YES -

Repair a short in the wires.?

NO -

Go to step 13.

13. Reconnect driver's MPCS unit connector A (40P).

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

15. Measure the voltage between driver's door wire harness A 16P connector terminal No. 4 and body ground.

Is there about 5 V?

YES -

Replace the left power mirror.?

NO -

Replace the driver's MPCS unit.?

B2183

DTC Troubleshooting: B2183

DTC B2183:

Left Power Mirror Vertical Sensor Signal Error

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. Move the left power mirror in each direction with the power mirror switch.

4. Check for DTCs with the HDS.

Is DTC B2183 indicated?

2010 Acura Truck MDX V6-3.7L Page 144

7. Disconnect the 2P connector from the power tailgate right pinch sensor.

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

9. Measure the voltage between harness side of power tailgate right pinch sensor 2P connector terminals No. 2 (+) and No. 1 (-).

Is there battery voltage?

YES -

Replace the power tailgate right 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. 13 and power tailgate right 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 right pinch sensor 2P

connector terminal No. 1.