Circuit Description
The Electronic Suspension Control (ELC) module estimates the road surface and communicates that information to the Electronic Brake Control Module (EBCM) using the Left and Right Normal Force outputs. The EBCM uses this information to provide improved rough-road braking performance.
Conditions for Running the DTC
| • | The Ignition is on. |
| • | The fault is detected during three consecutive ignition cycles, or during the same ignition cycle after clearing the DTC with a scan tool. |
Conditions for Setting the DTC
The DTC is set when the Electronic Suspension Control (ELC) module measures a feedback voltage less than a preset value during a Right Normal Force output OFF state.
Action Taken When the DTC Sets
| • | Both the Left and Right Normal Force outputs are set to default output states. |
| • | The SERVICE RIDE CONTROL message is displayed. |
Conditions for Clearing the MIL/DTC
| • | The scan tool can be used to clear the DTC. |
| • | The On-Board diagnostic CLEAR RSS CODES feature can be used to clear the DTC. |
| • | The DTC is saved as history when the Electronic Suspension Control (ELC) module no longer sees a low feedback voltage during five (5) consecutive Right Normal Force output OFF states. The DTC will clear if the fault does not return after 50 consecutive ignition cycles. |
Diagnostic Aids
Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
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This step tests for normal voltage in the Right Normal Force circuit.
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This step checks for an open circuit condition in CKT 791.
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This step tests for high resistance, a short to ground, or an open in the Right Normal Force circuit.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Road Sensing Suspension Diagnostic System Check? | -- | Go to Step 2 | Go to Diagnostic System Check |
Did the voltage measure greater than the specified value? | 10 V | Go to Step 6 | Go to Step 3 | |
Test the Right Normal Force circuit for high resistance, a short to ground, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 4 | |
4 | Inspect for poor connections at the harness connector of the Electronic Brake Control Module (EBCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 5 |
5 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Did you complete the replacement? | -- | Go to Step 8 | -- |
6 | Inspect for poor connections at the harness connector of the Electronic Suspension Control (ELC) module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 7 |
7 |
Important: Perform the set up and calibration procedure for the Electronic Suspension Control (ELC) module. Replace the Electronic Suspension Control (ELC) module. Refer to Electronic Suspension Control Module Replacement . Did you complete the replacement? | -- | Go to Step 8 | -- |
8 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
