Circuit Description
The electronic brake control module (EBCM) monitors the powertrain control module (PCM). The EBCM will prevent traction control and vehicle stability control (VSC) operation if it determines fault within the powertrain control system.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C1201 Throttle Control System Performance
Conditions for Running the DTC
DTC C1201 can be set anytime the engine speed is above 500 RPM.
Conditions for Setting the DTC
The EBCM detects a fault within the powertrain control system.
Action Taken When the DTC Sets
| • | The traction control and VSC is disabled. |
| • | The VSC warning indicator turns ON. |
Conditions for Clearing the DTC
The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
Diagnostic Aids
Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction.
The following are possible causes of the malfunction:
| • | A powertrain control system malfunction |
| • | An internal PCM malfunction |
If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics Connector End View Reference: Antilock Brake System Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | Are any powertrain DTCs set in addition to C1201? | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | Go to Step 3 |
3 | Replace the powertrain control module (PCM). Refer to Powertrain Control Module Replacement or Powertrain Control Module Replacement in Engine Controls. Did you complete the replacement? | Go to Step 4 | -- |
4 |
Does the DTC reset? | Go to Step 2 | System OK |
