Circuit Description
The damper control relay is located within the electronic suspension control
(ESC) module. Although the module will set DTC C0690, C0691 or C0693, each
one represents a failure of the damper control relay within the ESC module which
requires replacement of the ESC module.
Conditions for Running the DTC
The ignition ON.
Conditions for Setting the DTC
| • | The ESC module detected an internal malfunction. |
| • | The malfunction must be detected when the ignition switch is first turned
ON. |
Action Taken When the DTC Sets
| • | Stores a DTC C0690, C0691 or C0693 in the ESC memory |
| • | Depending on which internal circuitry was affected by this malfunction,
the ESC module will command one of the following actions: |
| - | Command 0% PWM duty cycle in order to disable all four shock absorber
solenoids. |
| - | Ignore the steering position input. |
| - | Provide shock absorber solenoid control based on the vehicle speed only. |
| - | Sends a message to the IPC to display the SERVICE RIDE CONTROL message. |
| - | Sends a message to the IPC to display the SHOCKS INOPERATIVE message. |
| • | If the disable all four shock absorber solenoids action was taken, the
ESC module sends a message to the powertrain control module (PCM) to limit the speed.
The PCM then sends a message to the instrument panel cluster (IPC) to display the
MAXIMUM SPEED 129 km/h (80 mph) message. |
Conditions for Clearing the DTC
| • | Under all fault conditions, the ignition must be cycled before this DTC
can change from current to history. |
| • | The ESC module no longer detects any internal malfunctions when the ignition
is first turned to the ON position. |
| • | A history DTC will clear after 100 consecutive ignition cycles
if the condition for the malfunction is no longer present. |
| • | Use the IPC clearing DTC feature. |
Diagnostic Aids
| • | Since DTC C0690, C0691 or C0693 is an internal damper control relay
malfunction to the ESC module, there is no repair procedure and the ESC module must
be replaced. |
| • | The ESC module tests for multiple internal damper control relay malfunctions
and will store a DTC C0690, C0691 or C0693 if one or more internal malfunctions
are detected. Therefore, depending on which malfunction was detected, and what internal
circuitry was affected, this DTC may cause various symptoms. |
Test Description
The number below refers to the step number on the diagnostic table.
-
This DTC requires ESC module replacement.
