DTC Troubleshooting: C1640-14, C1641-14, C1642-14, C1643-14
DTC C1640-14: Left Front Damper Solenoid Circuit Open Failure
DTC C1641-14: Right Front Damper Solenoid Circuit Open Failure
DTC C1642-14: Left Rear Damper Solenoid Circuit Open Failure
DTC C1643-14: Right Rear Damper Solenoid Circuit Open Failure
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
DTC
Freeze Frame
C1640-14 Left Front Damper Solenoid Circuit Open Failure
    
C1641-14 Right Front Damper Solenoid Circuit Open Failure
    
C1642-14 Left Rear Damper Solenoid Circuit Open Failure
    
C1643-14 Right Rear Damper Solenoid Circuit Open Failure
    

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.

?4.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
C1640-14 Left Front Damper Solenoid Circuit Open Failure
    
C1641-14 Right Front Damper Solenoid Circuit Open Failure
    
C1642-14 Left Rear Damper Solenoid Circuit Open Failure
    
C1643-14 Right Rear Damper Solenoid Circuit Open Failure
    

Is DTC C1640-14, C1641-14, C1642-14, or C1643-14 indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?
2.
Open wire check (ADS COIL OUT lines):

Open wire check (ADS COIL OUT lines)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connectors.
Adaptive damper control unit 24P connector
Appropriate damper actuator 2P connector

?3.
Check for continuity between the adaptive damper control unit 24P connector terminals and appropriate damper actuator 2P connector terminals individually (see table).
Test condition
Vehicle OFF (LOCK) mode
 
Adaptive damper control unit 24P connector: disconnected
 
Appropriate damper actuator 2P connector: disconnected

DTC
Circuit Name
Adaptive Damper Control Unit 24P Connector
Damper Actuator 2P Connector (female terminals):
C1640-14
(Left-front)
ADS COIL OUT FL H
No. 3
No. 2
ADS COIL OUT FL L
No. 4
No. 1
C1641-14
(Right-front)
ADS COIL OUT FR H
No. 10
No. 2
ADS COIL OUT FR L
No. 9
No. 1
C1642-14
(Left-rear)
ADS COIL OUT RL H
No. 5
No. 2
ADS COIL OUT RL L
No. 11
No. 1
C1643-14
(Right-rear)
ADS COIL OUT RR H
No. 7
No. 2
ADS COIL OUT RR L
No. 6
No. 1


Is there continuity?

     
YES
     
     
     
The ADS COIL OUT wires are OK. Replace the appropriate damper unit.?
     
NO
     
     
     
Repair an open in the wire between the adaptive damper control unit and the appropriate damper actuator.?