DTC Troubleshooting: P0AB6
DTC P0AB6: Rear Engine Mount Actuator Circuit Malfunction
NOTE:
Before you troubleshoot, record all freeze data and any on-board snapshots, and review the general troubleshooting information.
When testing the rear engine mount actuator, be sure to use a Digital volt/ohm meter (DVOM) capable of reading 0.01 ohms change of resistance.
Be sure to zero the meter before checking the rear engine mount actuator.
If the vehicle has been driven, allow the rear engine mount actuator to cool down for about 2 hours before testing.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0AB6 Rear Engine Mount Actuator Circuit Malfunction
      

1.
Problem verification:

Problem verification
?1.
Press the engine start/stop button to select the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Start the engine, and let it idle 20 seconds.

?4.
Check for pending or confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0AB6 Rear Engine Mount Actuator Circuit Malfunction
      

Is DTC P0AB6 indicated?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the engine mount control unit and the rear engine mount actuator.?
2.
Shorted wire check (RR ACM SOL+, RR ACM SOL- lines to power):

Shorted wire check (RR ACM SOL+, RR ACM SOL- lines to power)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connectors.

?3.
Press the engine start/stop button to select the ON mode.

?4.
Measure the voltage between test points and body ground individually.
Test condition
ON mode
Rear engine mount actuator 2P connector: disconnected
Engine mount control unit 16P connector: disconnected

Connector
Test circuit
Terminal
Engine mount control unit 16P connector
RR ACM SOL+
No. 2 (WHT)
RR ACM SOL-
No. 1 (BLU)


Is there battery voltage measured at one or both testing points?

     
YES
     
     
     
Repair a short to power in the RR ACM SOL+ and/or RR ACM SOL- wire(s) between the engine mount control unit and the rear engine mount actuator, then do the repair verification.
     
NO
     
     
     
Go to step 3.
3.
Shorted wire check (RR ACM SOL+ line to RR ACM SOL- line):

Shorted wire check (RR ACM SOL+ line to RR ACM SOL- line)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
Rear engine mount actuator 2P connector: disconnected
Engine mount control unit 16P connector: disconnected
Test circuit
RR ACM SOL+, RR ACM SOL-
Test point 1
Engine mount control unit 16P connector No. 2 (WHT)
Test point 2
Engine mount control unit 16P connector No. 1 (BLU)


Is there continuity?

     
YES
     
     
     
Repair a short in the RR ACM SOL+ wire to RR ACM SOL- wire between engine mount control unit 16P connector terminals No. 2 and No. 1, then do the repair verification.
     
NO
     
     
     
Go to step 4.
4.
Rear engine mount actuator check:

Rear engine mount actuator check
?1.
At the rear engine mount actuator side, measure the resistance between test points 1 and 2.
NOTE: Zero-out the meter before testing to adjust the meter to the test leads.

Test condition
OFF mode
Rear engine mount actuator 2P connector: disconnected
Engine mount control unit 16P connector: disconnected
Test circuit
RR ACM SOL+, RR ACM SOL-
Test point 1
Rear engine mount actuator 2P connector No. 1
Test point 2
Rear engine mount actuator 2P connector No. 2


Is there about 1.37?1.51 ? (68 °F/20 °C)?

     
YES
     
     
     
Check for poor connections or loose terminals at the engine mount control unit and the rear engine mount actuator. If it is OK, replace the engine mount control unit, then do the repair verification.
     
NO
     
     
     
Repair verification:

?1.
Press the engine start/stop button to select the OFF mode.

?2.
Reconnect all connectors.

?3.
Press the engine start/stop button to select the ON mode.

?4.
Clear the DTC with the HDS.


?5.
Start the engine, and let it idle 20 seconds.

?6.
Check for pending or confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0AB6 Rear Engine Mount Actuator Circuit Malfunction
      


Is DTC P0AB6 indicated?

     
YES
     
     
     
Check for poor connections or loose terminals at the engine mount control unit and the rear engine mount actuator, then go to step 1.
     
NO
     
     
     
Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.?