14-B

Active Damper System DTC Troubleshooting: 14-B

DTC 14-B: Active Damper Control Unit Power Supply Circuit Malfunction

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

2. Clear the DTC with the HDS.

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

4. Start the engine, and raise the engine speed to 2,000 rpm.

5. Check and note IG1 VOLTAGE in the ACTIVE DAMPER SYSTEM DATA LIST with the HDS within 40 seconds after starting the engine.

Was there within 9.3-17.5 V for 30 seconds continuously?
YES - Go to step 12.

NO - Go to step 6.


6. With engine idle speed, wait 40 seconds.

7. Raise the engine speed to 2,000 rpm.

8. Measure voltage between active damper control unit connector A (20P) terminals No. 8 and No. 18.

Is there any voltage?
YES - If the voltage is above 17.5 V, check the battery, Testing and Inspection and troubleshoot the alternator and regulator circuit, Alternator and Regulator Circuit Troubleshooting then go to step 9. If voltage is normal, replace the active damper control unit. Service and Repair

NO - Repair poor connection between under-dash fuse/relay box connector F (14P) terminal No. 8, and active damper control unit connector A (20P) terminal No. 8, or poor ground at G302 and G401, then go to step 9.






9. Clear the DTC with the HDS.

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

11. Start the engine.

12. Do the DAMPER FORCE OPERATION in the ACTIVE DAMPER SYSTEM INSPECTION MENU with the HDS.

13. Check for DTCs with the HDS.

Is any DTC indicated?
YES - Go to the indicated DTC's troubleshooting.

NO - Troubleshooting is complete.