ACURA: 2010 Acura Truck MDX V6-3.7L Page 660

Tuesday, March 10, 2020

Modules - Transmission and Drivetrain/Relays and Modules - Differential/Control Unit/Testing and Inspection/SH-AWD Control Unit Update, or

substitute a known-good SH-AWD control unit See: Powertrain Management/Transmission Control Systems/Relays and Modules - Transmission

and Drivetrain/Relays and Modules - Differential/Control Unit/Service and Repair, and recheck. If the symptom/indication goes away with the

updated SH-AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good SH-AWD control unit,

replace the original SH-AWD control unit See: Powertrain Management/Transmission Control Systems/Relays and Modules - Transmission and

Drivetrain/Relays and Modules - Differential/Control Unit/Service and Repair.?

77-2

SH AWD DTC Troubleshooting: 77-2

DTC 77-2:

The Functional Abnormalities of VSA Modulator-Control Unit

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. Start the engine.

4. Check for DTCs with the HDS.

Is DTC 77-2 indicated?

YES -

Go to step 5.

NO -

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

5. Check for DTCs in the VSA system with the HDS.

Are there VSA system DTCs indicated?

YES -

Go to the indicated DTC's troubleshooting.?

NO -

Update the SH-AWD control unit if it does not have the latest software See: Powertrain Management/Transmission Control Systems/Relays and