For 1990-2009 cars only
Circuit Description
The instrument panel cluster (IPC) supplies 12 volts to the supplemental brake assist (SBA) module via the supplemental brake assist signal circuit. The SBA toggles this voltage to ground to produce a valid supplemental brake assist signal.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
| • | The IPC does not receive a valid health signal from the SBA for 5 consecutive ignition cycles. |
| • | The SBA is producing a supplemental brake assist signal indicating a system failure. |
Action Taken When the DTC Sets
The service brake booster message is displayed.
Conditions for Clearing the DTC
The scan tool is used to clear the DTC.
Step | Action | Yes | No |
|---|---|---|---|
1 | Did you perform the Driver Information Systems Diagnostic System Check? | Go to Diagnostic System Check - Driver Information Systems in Instrument Panel, Gages, and Console |
