• | 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. |
The body control module (BCM) supplies B+ to the stoplamp switch, when the pedal is pressed, the electronic brake control module (EBCM) receives an input that the brake pedal is applied.
• | Ignition ON. |
• | The vehicle speed is greater than 16 km/h (10 mph). |
• | The ignition voltage is greater than 10 volts. |
• | The vehicle speed is greater than 40 km/h (25 mph) and then slow down to less than 3 km/h (2 mph) 4 times and the brake pedal signal does not show any change in state. |
• | The vehicle speed is greater than 20 km/h (12 mph) and the brake pedal signal indicates an active state for continuously more than 6 minutes. |
• | The brake light switch signal coming from the module send invalid data to the EBCM in terms of the rolling count value. |
• | The ABS/TCS remains functional |
• | A DIC message and/or a warning indicator may be displayed. |
• | The condition for the DTC is no longer present. |
• | The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
The DTC C0161 00 can be set if the vehicle has been driven with the brake applied during acceleration.
Antilock Brake System Schematics
• | Circuit Testing |
• | Wiring Repairs |
Control Module References for scan tool information
Apply and release brake pedal. Verify brake lamps operate properly.
⇒ | If brake lamps do not operate properly, refer to Symptoms - Lighting. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.