Faulty Signal

Faulty signal

Checking the stop lamp switch








- Ignition off
- Disconnect the stop lamp switch connector.
Check the function of the stop lamp switch by connecting an ohmmeter between terminals #2 and #4 on the stop lamp switch and activating it at the same time.

Stop lamp switch, resistance:
- Activated: 1520-1680 ohms
- Not activated: 0 ohms.
Remedy as necessary.

Other information:
- To replace the stop lamp switch, see Stop lamp switch, replacing Service and Repair.









Was the resistance incorrect?

Yes - Verification

No - Checking the wiring and component

-------------------------------------------------

Checking the wiring and component








- Ignition off
- The connector for the stop lamp switch is disconnected.
Check the cable between:
1. stop lamp switch terminal #2 ABS control module terminal #A14 (#A14)
2. stop lamp switch terminal #2 and connection point 53/329
3. connection point 53/329 and ground terminal 31/93.
check for an open-circuit, a short-circuit to ground and a short-circuit to supply voltage.
Remedy as necessary.

Other information:
- To connect the breakout box, see Connecting the ABS/DSTC breakout box Pinout Values and Diagnostic Parameters
- Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault









Were any faults found in the cable?

Yes - Verification

No - Checking for contact resistance and oxidation

-------------------------------------------------

Checking for contact resistance and oxidation








- Ignition off
- Disconnect the connector for the ABS control module
- Disconnect the stop lamp switch connector.
Check the control module and brake pressure sensor connectors. Check for contact resistance and oxidation.

Other information:
- To access the control module connector, see Connecting the ABS/DSTC breakout box Pinout Values and Diagnostic Parameters
- To access the stop lamp switch connector, see Stop lamp switch, replacing Service and Repair
- Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault






Continue - Verification

-------------------------------------------------

Verification




Verification

Verification

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




- Ignition on
- Erase diagnostic trouble codes (DTCs).






Continue - continued

------------------------

Verification, continued




- Ignition on
- Test drive the car according to Test Drive Form (ABS), description Test Drive Form (ABS), Description
- Read off diagnostic trouble codes (DTCs).





Is diagnostic trouble code (DTC) ABS-0064 stored?

Yes - VERIFICATION FAILED

No - VERIFIED

------------------------

VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

-------------------------------------------------

Fault-tracing information




Information

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.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

------------------------

Attempt New Test - Checking the stop lamp switch

FAULT-TRACING FAILED - FAULT-TRACING FAILED

-------------------------------------------------