2010 Acura Truck MDX V6-3.7L Page 736

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. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.

4. Check for DTCs with the HDS.

Is DTC 121, 122, 123, or 124 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for a loose connection at G303.?

5. 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.

6. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.

7. Check for DTCs with the HDS.

Is DTC 121,122, 123, or 124 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.?

122

VSA DTC Troubleshooting: 121, 122, 123, 124

DTC 121, 122, 123, 124:

VSA Solenoid Valve 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. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.

4. Check for DTCs with the HDS.

Is DTC 121, 122, 123, or 124 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for a loose connection at G303.?

2010 Acura Truck MDX V6-3.7L Page 535

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 53-1 or 53-3 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.

Is there continuity?

YES -

Go to step 9.

NO -

Repair an open in the wire between the SH-AWD control unit and the left clutch electromagnetic coil.?

9. Remove the jumper wire from left solenoid 4P connector terminal No. 1.

10. Connect left solenoid 4P connector terminal No. 2 to body ground with a jumper wire.

2010 Acura Truck MDX V6-3.7L Page 680

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 LOCK (0).

2. Disconnect SH-AWD control unit connector A (20P).

3. Check for continuity between SH-AWD control unit connector terminals A3 and A12.

Is there continuity?

YES -

Go to step 4.

NO -

Go to step 7.

4. Check the REAR DIFFERENTIAL FLUID TEMPERATURE in the DATA LIST is above 68 掳F (20 掳C) with the HDS before proceeding

to the next step. If the temperature is below 68 掳F (20 掳C), drive the vehicle to warm up the rear differential until the fluid temperature

becomes above 68 掳F (20 掳C).

5. Measure the resistance between SH-AWD control unit connector terminals A3 and A12.

Is there 2.0 Ohms or more?

YES -

Go to step 6.

NO -

Go to step 9.

6. Check for continuity between SH-AWD control unit connector terminal A3 and body ground.

2010 Acura Truck MDX V6-3.7L Page 754

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

1. Update the VSA modulator-control unit See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Traction Control

Module/Testing and Inspection.

2. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.

3. Check for DTCs with the HDS.

Is DTC 158 indicated?

YES -

Check for loose terminals in the VSA modulator-control unit 47P connector. If necessary, substitute a known-good VSA modulator-control unit,

and retest See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Traction Control Module/Service and Repair.?

NO -

The system is OK at this time.?

199

Adaptive Cruise Control (ACC) DTC Troubleshooting: 199

DTC 199:

Adaptive Cruise Control (ACC) unit Programming Error

NOTE:

- This DTC is indicated when a ACC unit update is not complete.

- Do not turn the ignition switch to LOCK (0) while updating the ACC unit. If you turn the ignition switch to LOCK (0) before completion, the

ACC unit will be damaged.

1. Clear the DTCs with the HDS.

2. Do the ACC unit update procedure See: Cruise Control/Testing and Inspection/Programming and Relearning.

3. Check for DTCs with the HDS.

Is DTC 199 indicated?

YES -

Faulty ACC unit; replace the ACC unit See: Cruise Control/Cruise Control Module/Service and Repair, then recheck.?

NO -

The update is complete.?

1001

Navigation System DTC Troubleshooting: 1001

DTC 1001:

FROM System Info Error

NOTE:

- Check the vehicle battery condition first See: Starting and Charging/Battery/Testing and Inspection/Component Tests and General

Diagnostics/Battery Test.

- This navigation DTC sets when there is an internal problem with the Flash-ROM.

- Check any official Honda service website for more service information about the navigation system.

- Before you troubleshoot, make sure to follow the general troubleshooting information See: Accessories and Optional Equipment/Navigation

System/Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Troubleshoot the Navigation System.

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

2. Check for the hard error code.

2010 Acura Truck MDX V6-3.7L Page 202

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. Check for DTCs with the HDS.

Is DTC 88 indicated with DTC 11, 13, 15, or 17 at the same time?

YES -

Go to step 9.

NO -

Go to step 3.

3. Clear the DTC with the HDS.

4. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.

5. Check for DTCs with the HDS.

Is DTC 11, 13, 15, or 17 indicated?

YES -

Go to step 6.

NO -

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

modulator-control unit 46P connector. Check for a loose connection at G303. Refer to intermittent failures troubleshooting.?

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

7. Check for loose terminals between the wheel speed sensor 2P connector and the VSA modulator-control unit 46P connector.

Are the connections OK?

YES -

Go to step 8.

NO -

Repair the connector or terminals if possible, or replace the harness, and retest.?

8. Check that the appropriate wheel speed sensor is properly mounted See: Brakes and Traction Control/Antilock Brakes / Traction Control

Systems/Wheel Speed Sensor/Service and Repair.

Is the wheel speed sensor installation OK?

YES -

Go to step 10.

NO -

Reinstall the wheel speed sensor See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Wheel Speed Sensor/Service and

Repair, then go to step 1.?

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

10. Disconnect the VSA modulator-control unit 46P connector.