For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### DTC Descriptors

DTC C0141 00: Front Left/Front Right TC/ESP Priming Valve Circuit Malfunction
DTC C0146 00: Front Left/Front Right TC/ESP Switch Over Valve Circuit Malfunction
DTC C0151 00: Rear Left/Rear Right TC/ESP Priming Valve Circuit Malfunction
DTC C0156 00: Rear Left/Rear Right TC/ESP Switch Over Valve Circuit Malfunction

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Left TCS Solenoid #1 Circuit Malfunction | C0141 00 | C0141 00 | C0141 00 | --
Left TCS Solenoid #2 Circuit Malfunction | C0146 00 | C0146 00 | C0146 00 | --
Right TCS Solenoid #1 Circuit Malfunction | C0151 00 | C0151 00 | C0151 00 | --
Right TCS Solenoid #2 Circuit Malfunction | C0156 00 | C0156 00 | C0156 00 | --

### Circuit/System Description

The solenoid circuits are supplied with battery voltage when the ignition is in the RUN position. The Electronic Brake Control Module (EBCM) controls the valve function by grounding the solenoid circuit when necessary. The #1 solenoids are prime valves, the #2 solenoids are isolation valves.

### Conditions for Running the DTC

The ignition is ON.

### Conditions for Setting the DTC

A short to voltage, open or ground is detected on the solenoids within the brake modulator assembly.

### Action Taken When the DTC Sets

• | The EBCM disables the Antilock Brake System (ABS)/Traction Control System (TCS)/Electronic Stability Control (ESP)/Electronic Brake Distribution (EBD) for the duration of the ignition cycle.

• | The multi function display (MFD) displays the ABS Fault message.

• | The multi function display (MFD) displays the Traction Ctrl Off message.

• | The multi function display (MFD) displays the Stability Ctrl Off message.

### Conditions for Clearing the DTC

• | The condition for setting the DTC is no longer present.

• | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

• | The DTC can be cleared using a scan tool.

### Diagnostic Aids

The TCS solenoid is integral to the brake modulator assembly/EBCM. The brake fluid pressure sensor is not serviceable independently.

### Reference Information

#### Schematic Reference

Antilock Brake System Schematics .

#### Connector End View Reference

Component Connector End Views .

#### Electrical Information Reference

• | Circuit Testing .

• | Connector Repairs .

• | Testing for Intermittent Conditions and Poor Connections .

• | Wiring Repairs .

#### Scan Tool Reference

Control Module References .

### Circuit/System Verification

Using a scan tool, clear current DTCs.

### Circuit/System Testing

1. Start the engine and allow to idle, using a scan tool check if DTC is set to current.

⇒ | If the DTC is set to current, replace the brake modulator assembly/ EBCM.

### Repair Instructions

• | Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Brake Pressure Modulator Valve Assembly Replacement .

• | Control Module References .