For 1990-2009 cars
ABS Components
Antilock Brake System Schematics

### Circuit Description

The throttle position signal is used by the ASM to control the actual throttle position that is requested by the EBTCM. The EBTCM compares the Delivered throttle position sensor value that is sent from the ASM to the throttle position sensor value sent from the PCM over the Class 2 serial data line.

### Conditions for Setting the DTC

DTC C0238 will set if the EBTCM detects a difference between the PCM throttle position and the throttle position sent from the ASM.

### Action Taken When the DTC Sets

• | A malfunction DTC is stored.

• | The TCS is disabled.

### Conditions for Clearing the DTC

• | Condition for DTC is no longer present and scan tool clear DTC function is used.

• | 100 ignition cycles have passed with no DTCs detected.

### Diagnostic Aids

• | It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.

• | If an intermittent malfunction exists refer to General Electrical Diagnosis in Wiring Systems.

### Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

1. This step checks if the PCM detected a fault.

#### DTC C0238 TCS Throttle Position Sensor Comparison Malfunction

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the Diagnostic System Check performed? | -- | Go to Step 2 | Go to Diagnostic System Check - ABS
2 | Are any PCM TPS DTCs set? | -- | Go to Engine Controls System Check | Go to Step 3
3 |

1. Using a scan tool clear the DTC.
2. Turn the ignition switch to the OFF position.
3. Disconnect the scan tool.
4. Turn the ignition switch to the RUN position, engine off.

Does DTC C0238 reset as a current DTC?

--

Go to Step 4

Go to Diagnostic System Check - ABS

4 | Replace the EBTCM. Refer to Electronic Brake Control Module Replacement . Is the replacement complete? | -- | Go to Diagnostic System Check - ABS | --