2010 Acura Truck MDX V6-3.7L Page 166

Go to step 6.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections between the power tailgate control unit and the drive unit.?

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

7. Open the tailgate.

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

9. Check for continuity between body ground and power tailgate control unit connector B (20P) terminals No. 9 and No. 20 individually.

Is there continuity?

YES -

Repair a short to ground in the wire. If the wire is OK, replace the drive unit.?

NO -

Go to step 10.

10. Measure the voltage between power tailgate control unit connector B (20P) terminal No. 12 and body ground.

Is there battery voltage?

YES -

Replace the power tailgate control unit.?

NO -

Check the No. 6 (20 A) fuse in the rear fuse/relay box. If the fuse is OK, check for an open in the wire between the rear fuse/relay box and the

power tailgate control unit.?

B1390

DTC Troubleshooting: B1390

DTC B1390:

Power Tailgate Closer Function Error

1. With the tailgate closed, pull the tailgate outer handle and wait for 10 seconds.

2010 Acura Truck MDX V6-3.7L Page 163

Go to step 6.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections between the power tailgate control unit and the drive unit.?

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

7. Disconnect power tailgate control unit connector A (5P).

8. Disconnect drive unit connector A (2P).

9. Check for continuity between body ground and power tailgate control unit connector A (5P) terminals No. 3 and No. 5 individually.

Is there continuity?

YES -

Repair a short to ground in the wire.?

NO -

Go to step 10.

10. Reconnect drive unit connector A (2P).

11. Connect battery power to the power tailgate control unit connector A (5P) terminal No. 3 (or No. 5) and ground the terminal No. 5 or (No. 3).

12. Check the power tailgate motor operation.

Does the motor run normally?

YES -

Go to step 13.

NO -

Faulty power tailgate motor, replace the drive unit.?

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

14. Disconnect drive unit connector B (8P).

15. Check for continuity between body ground and power tailgate control unit connector B (20P) terminals No. 9 and No. 20 individually.

2010 Acura Truck MDX V6-3.7L Page 119

Go to step 6.

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

7. Test the rear air mix control motor See: Heating and Air Conditioning/Testing and Inspection/Component Tests and General

Diagnostics/Rear Air Mix Control Motor Test.

Is the rear air mix control motor OK?

YES -

Go to step 8.

NO -

Replace the rear air mix control motor See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and Repair/Rear Air Mix

Control Motor Replacement.?

8. Disconnect the rear air mix control motor 7P connector.

9. Disconnect climate control unit connector A (40P) and B (14P).

10. Check for continuity between climate control unit connector B (14P) 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 rear air mix control motor.?

NO -

Go to step 11.

11. Check for continuity between climate control unit connector A (40P) terminal No. 6 and climate control unit connector B (14P) terminal No.

5.

Is there continuity?

YES -

Repair a short in the wires.?

2010 Acura Truck MDX V6-3.7L Page 119

Go to step 6.

NO -

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 A (20P) See: Relays and Modules/Relays and Modules - Steering and Suspension/Relays

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

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

9. Measure the voltage between body ground and the appropriate active damper control unit connector A (20P) terminal (see table).

Is there more than 0.5 V?

YES -

Repair a short to power in the wire between the appropriate suspension stroke sensor and the active damper control unit, then go to step 15.

NO -

Go to step 10.

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

11. 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.

12. Disconnect the appropriate suspension stroke sensor 3P connector.

13. Check for continuity between appropriate suspension stroke sensor 3P connector terminals No. 1 and No. 2.

2010 Acura Truck MDX V6-3.7L Page 79

Go to step 6.

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

7. Test the passenger's air mix control motor See: Heating and Air Conditioning/Testing and Inspection/Component Tests and General

Diagnostics/Passenger's Air Mix Control Motor Test.

Is the passenger's air mix control motor OK?

YES -

Go to step 8.

NO -

Replace the passenger's air mix control motor See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and

Repair/Passenger's Air Mix Control Motor Replacement.?

8. Disconnect the passenger's air mix control motor 7P connector.

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

10. Check for continuity between climate control unit connector A (40P) terminal No. 30 and body ground.

Is there continuity?

YES -

Repair a short to body ground in the wire between the climate control unit and the passenger's air mix control motor.?

NO -

Go to step 11.

11. Check for continuity between climate control unit connector A (40P) terminals No. 6 and No. 30.

Is there continuity?

YES -

Repair a short in the wires.?

NO -

Go to step 12.

12. Turn the ignition switch to ON (II), and measure the voltage between climate control unit connector A (40P) terminal No. 30 and body

2010 Acura Truck MDX V6-3.7L Page 316

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

switch to ON (II), and try again. If UNDEFINED is still displayed, repeat this procedure until NORMAL is shown.

Is 176 掳F (80 掳C) or more indicated?

YES -

Replace the appropriate tire pressure sensor See: Instrument Panel, Gauges and Warning Indicators/Tire Monitoring System/Tire Pressure

Sensor/Service and Repair.?

NO -

Check for loose terminals and poor connections at the TPMS control unit. If necessary, substitute a known-good TPMS control unit See:

Instrument Panel, Gauges and Warning Indicators/Tire Monitoring System/Tire Pressure Module/Service and Repair, and recheck.?

VSA System

VSA DTC Troubleshooting: 21, 22, 23, 24

DTC 21, 22, 23, 24:

Magnetic Encoder Malfunction

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

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

2. Clear the DTC with the HDS.

3. Test-drive the vehicle at 31 mph (50 km/h) or more.

4. Check for DTCs with the HDS.

Is DTC 21, 22, 23, or 24 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose terminals between the appropriate wheel speed sensor 2P connector and the

VSA modulator-control unit 46P connector. Refer to intermittent failures troubleshooting.?

5. Inspect the appropriate magnetic encoder for debris or cracks.

Is the magnetic encoder surface OK?

YES -

Go to step 6.

NO -

Remove the debris from the magnetic encoder, or replace the front hub bearing unit or the rear hub bearing unit (magnetic encoder):

- FRreoanr:t :R Reepplalaccee t hthee r feraorn ht uhbu bb ebaerainrign gu nuint.i?t.?

2010 Acura Truck MDX V6-3.7L Page 769

Go to step 6.

NO -

Go to step 5.

5. Check the System Links.

Is the HFL icon red?

YES -

Do the DTC 2705 troubleshooting See: 2705.?

NO -

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

6. Select the XM (HIP), then check the XM (HIP) System Link.

Are the XM (HIP).ECU and Navi icons red?

YES -

Go to step 7.

NO -

Do the DTC 2704 troubleshooting See: 2704.?

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

8. Connect the HDS to the DLC See: Accessories and Optional Equipment/Radio, Stereo, and Compact Disc/Testing and Inspection/Initial

Inspection and Diagnostic Overview/How to Troubleshoot the AcuraLink.

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

10. Check for DTCs with the HDS.

Are any AcuraLink DTCs indicated?

YES -

Do the AcuraLink DTCs troubleshooting.?

NO -

Go to step 11.

11. Do the B-CAN 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, and check the

communication with the AcuraLink control unit.

Does the AcuraLink control unit communicate with the HDS?

YES -

Go to step 12.

NO -

Go to the AcuraLink control unit troubleshooting.?

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

13. Disconnect AcuraLink control unit (XM receiver) connector A (32P) and audio-navigation unit connector C (28P).

14. Check for continuity between body ground and AcuraLink control unit (XM receiver) connector A (32P) terminals No. 17, No. 18, No. 19,

and No. 20 individually.

2010 Acura Truck MDX V6-3.7L Page 192

Go to step 6.

NO -

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

stroke sensor, and the active damper control unit.?

6. Clear the DTC with the HDS.

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

8. Disconnect the right-front suspension stroke sensor 3P connector.

9. Start the engine, and wait 5 seconds.

10. Check for DTCs with the HDS.

Is DTC 8-2 indicated?

YES -

Go to step 11.

NO -

Replace the right-front suspension stroke sensor See: Sensors and Switches/Sensors and Switches - Steering and Suspension/Sensors and Switches

- Suspension/Ride Height Sensor/Service and Repair.?

11. Clear the DTC with the HDS.

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

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

14. Start the engine, and wait 5 seconds.

15. Check for DTCs with the HDS.

Is DTC 8-2 indicated?

YES -

Go to step 16.

NO -

Replace the right-rear suspension stroke sensor See: Sensors and Switches/Sensors and Switches - Steering and Suspension/Sensors and Switches -

Suspension/Ride Height Sensor/Service and Repair.?

16. Clear the DTC with the HDS.

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

18. Disconnect the front vertical acceleration sensor 3P connector.

19. Start the engine, and wait 5 seconds.

20. Check for DTCs with the HDS.

Is DTC 8-2 indicated?

YES -

Go to step 21.

NO -

Replace the front vertical acceleration sensor See: Sensors and Switches/Sensors and Switches - Steering and Suspension/Sensors and Switches -

Suspension/Acceleration Sensor/Service and Repair.?

21. Clear the DTC with the HDS.

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