DTC 7-9
DTC 7-9: Active Damper Control Unit Internal Circuit MalfunctionNOTE: If DTC 5-5, DTC 5-6, DTC 5-7, or DTC 5-8 stored at the same time as DTC 7-9, troubleshoot DTC 5-5, DTC 5-6, DTC 5-7, or DTC 5-8 first, then recheck for DTC 7-9.
1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch OFF.
4. Start the engine, and wait 5 seconds.
5. Check for DTCs with the HDS.
Is DTC 7-9 indicated?
YES - Go to step 6.
NO - Intermittent failure at this time. Check for poor or loose connections between the damper coil and the active damper control unit.
6. Turn the ignition switch OFF.
7. Disconnect active damper control unit connector A (20P).
8. Check for continuity between the active damper control unit connector A (20P) terminals individually.
Is there continuity?
YES - Replace the active damper control unit then go to step 11.
NO - Go to step 9.
9. Disconnect the appropriate damper coil 2P connector.
10. On the damper, check for continuity between damper coil 2P connect or terminals No. 1 and No. 2 for all four dampers.
Is there continuity?
YES - Repair open in the wire between the damper coil and active damper control unit, then go to step 11.
NO - Replace the damper unit then go to step 11.
11. Reconnect all connectors.
12. Turn the ignition switch ON (II).
13. Clear the DTC with the HDS.
14. Start the engine.
15. Do the DAMPER FORCE OPERATION in the ACTIVE DAMPER SYSTEM INSPECTION MENU with the HDS.
16. Check for DTCs with the HDS.
Is any DTC indicated?
YES - Go to the indicated DTC's troubleshooting.
NO - Troubleshooting is complete.