Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pinpoint Test B: Brake Pedal Position Input Circuit Failure
Test Step
B1 CHECK CIRCUIT 15S-CF58 (GN/OG) FOR AN OPEN
- Key in OFF position.
- Disconnect: Traction Control Module C135.
- Key ON position.
- Measure the voltage between the traction control module C135 pin 41, circuit 15S-CF58 (GN/OG), harness side and ground while pressing and releasing the brake pedal.
- Is the voltage greater than 10 volts with the brake pedal pressed, and zero volts with the brake pedal released?
Result / Action to Take
Yes
INSTALL a new HCU. REFER to ANTI-LOCK CONTROL . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.