Signal Too High - Permanent Fault

ECM-9400 BRAKE PEDAL POSITION SENSOR, FAULTY SIGNAL
SIGNAL TOO HIGH - PERMANENT FAULT

Checking component and wiring



Check the brake pedal sensor resistance between # 1 and # 2, for resistance values see Component specifications. Specifications

Check cable between engine control module (ECM) # B16 and brake pedal sensor # 1 for a short-circuit to supply voltage according to [1][2]Checking Wiring and Terminals. Permanent Fault

Check the cable between # B4 and brake pedal sensor # 2 for a short-circuit to supply voltage according to [1][2]Checking Wiring and Terminals. Permanent Fault and an open-circuit according to [1][2]Checking Wiring and Terminals. Permanent Fault

Remedy as necessary.

Other information:
- To connect the breakout box, Connecting the Breakout Box (ECM)
- With the ignition on and brake pedal sensor connector disconnected, the voltage between clutch pedal position sensor # 1 and ground should be approximately 5 V.
- When the clutch pedal position sensor connector is disconnected, the brake pedal sensor # 4 must be connected to ground.
- For information about signals, see Diagnostic Parameters and Pinout Values. Signal Description, ME7, B5XX4T


Verification



Hint:After carrying out the repair, check that the fault has been remedied.

- Ignition off.
- Reinstall connectors, components etc.
- Ignition on.
- Read brake pedal movement by pressing down and releasing brake pedal.

The value is between 2.9-3.2 V when the brake pedal is unaffected and decreases when the brake pedal is depressed.

Do the movements correspond?
Yes - Testing Complete.
No - Continue below.


Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed. Exit fault tracing for this diagnostic trouble code (DTC) or make another attempt.