Faulty Signal

ECM-941F BRAKE PEDAL SENSOR, FAULTY SIGNAL
FAULTY SIGNAL

Reading Diagnostic Trouble Code (DTC) status ECM-941F




Note! When Reading the Diagnostic Trouble Code (DTC) status, other stored Diagnostic Trouble Codes (DTCs) and their status will be listed.

- Read the Diagnostic Trouble Code (DTC) status. Check the status of the relevant Diagnostic Trouble Code (DTC).

Was the status of the relevant Diagnostic Trouble Code (DTC) displayed as permanent?
Yes - Skip to "Checking Component and Wiring"
No - Continue below.


Checking cables and connectors



Visually check the stop (brake) lamp switch terminals according to [1][2]Checking Wiring and Terminals. Intermittent Faults

Check signal cable between Engine Control Module (ECM) connector # B26 (# B36) and stop (brake) lamp switch connector # 3 (Engine Control Module (ECM) side) for an intermittent open-circuit according to [1][2]Checking Wiring and Terminals. Intermittent Faults

Remedy as necessary.

Other information
- To access/replace the stop (brake) lamp switch, Stop (Brake) Lamp Switch, Replacing
- For information about signal, Pinout Values and Diagnostic Parameters


Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
--Testing Complete--


Checking Component and Wiring



Check terminals visually according to Checking Wiring and Terminals. Permanent Fault

Check the stop (brake) lamp switch between # 3 and # 4, should be short circuited at the affected stop (brake) lamp switch.

Check with the ignition on that the voltage on the stop (brake) lamp switch connector # 4 (Engine Control Module (ECM) side) is approximately Ubat.

Check signal cable between Engine Control Module (ECM) connector # B26 (# B36) and stop (brake) lamp switch connector # 3 (Engine Control Module (ECM) side) for an open-circuit according to [1][2]Checking Wiring and Terminals. Permanent Fault

Remedy as necessary.

Other information:
- To access/replace the stop (brake) lamp switch, Stop (Brake) Lamp Switch, Replacing
- For information about signal, Pinout Values and Diagnostic Parameters
- The stop (brake) lamp switch is supplied via kl: 15.


Verification



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

- Ignition off.
- Reinstall connectors, components etc.
- Ignition on.
- Read the stop (brake) lamp switch status by depressing and releasing the brake pedal.

Is the status changed?
Yes - Tesing 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.