C0236

DTC C0236

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptor
DTC C0236 00
- Traction Control System (TCS) Engine RPM Signal Circuit

Diagnostic Fault Information





Circuit/System Description

The RPM signal circuit provides the EBCM with an indication of engine RPM for the TCS to maintain optimum traction.

Conditions for Running the DTC

* Engine Running.
* No under voltage condition is present.

Conditions for Setting the DTC

An open/high resistance, or short to ground on the engine speed signal circuit.

Action Taken When the DTC Sets

* The EBCM disables the traction control system (TCS) for the duration of the ignition.
* A DIC message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

* The condition for the DTC is no longer present in the last 100 ignition cycles and no DTCs have been detected.
* The condition for the DTC is no longer present.

Reference Information
Schematic Reference

Antilock Brake System Schematics ([1][2]Antilock Brakes / Traction Control Systems)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

ABS Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

Engine Running, with the scan tool observe the EBCM Engine Speed parameter and the ECM/PCM Engine Speed parameter. The reading should increase and decrease when pressing and releasing the accelerator pedal.

Circuit/System Testing

1. Ignition OFF, disconnect the X1 harness connector at the ECM/PCM.
2. Ignition ON, test for B+ between the appropriate signal circuit listed below terminal 11 and ground.

* Signal circuit terminal 7 (JL4)
* Signal circuit terminal 11 (-JL4)

• If less than the specified value, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the ECM/PCM.

3. Replace the EBCM.

Repair Instructions

Control Module References (Programming and Relearning) for EBCM, PCM, or ECM replacement, setup, and programming

Control Module References (Programming and Relearning) for EBCM, PCM, or ECM replacement, setup, and programming