Faulty Signal. Permanent Fault
Faulty signal. Permanent fault
Checking the connector
- Ignition off
- Check the connectors for the ABS control module, the yaw rate sensor, the lateral acceleration sensor and the brake pressure sensor. Check for contact resistance and oxidation
- Reinstall the components, reconnect the connectors etc.
- Ignition on.
Test drive the car. See Test driving Test Driving.
Read off the status of the diagnostic trouble code (DTC).
Other information:
- To connect the breakout box, see Connecting the ABS/DSTC breakout box Pinout Values and Diagnostic Parameters
- To disconnect the connector for yaw rate sensor 1, see Replacing the yaw rate sensor (1) and the lateral acceleration sensor in the center console (DSTC) Service and Repair. To disconnect the connector for yaw rate sensor 2, see Replacing the yaw rate sensor (2) (DSTC) Replacing the Yaw Rate Sensor (2) (DSTC)
- To disconnect the connectors for the brake pressure sensors, see Pressure sensor, master cylinder, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals
Is the status of the diagnostic trouble code (DTC) intermittent?
Yes - Fault Found
No - Checking wiring and sensors
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Checking wiring and sensors
Check the wiring between the ABS control module and the connectors for the yaw rate sensors.
For yaw rate sensor 1:
- terminal #1 and control module terminal #42 (terminal #A42)
- terminal #2 and control module terminal #11 (terminal #A11)
- terminal #3 and control module terminal #27 (#A27).
For yaw rate sensor 2:
- terminal #1 and control module terminal #14 (terminal #A14)
- terminal #2 and control module terminal #30 (#A30)
- terminal #3 and control module terminal #45 (terminal #A45).
Check for an open-circuit, a short-circuit to ground and a short-circuit to supply voltage.
Hint: With the ignition switched on, check the yaw rate sensors: Measure the signal from the sensor between:
Yaw rate sensor 1:
- terminals #11 and #42 on the breakout box. The voltage must be approximately 2.5 V
- terminals #11 and #27 on the breakout box. The voltage must be approximately 5 V.
Hint: Yaw rate sensor 2:
- terminals #14 and #30 on the breakout box. The voltage must be approximately 2.5 V
- terminals #30 and #45 on the breakout box. The voltage must be approximately 5 V.
Remedy as necessary.
Other information:
- To connect the breakout box, see Connecting the ABS/DSTC breakout box Pinout Values and Diagnostic Parameters
- To replace yaw rate sensor 1, see Replacing the yaw rate sensor (1) and the lateral acceleration sensor in the center console (DSTC) Service and Repair. To replace yaw rate sensor 2, see Replacing the yaw rate sensor (2) (DSTC) Replacing the Yaw Rate Sensor (2) (DSTC)
- For information about signals, see Signal specification, ABS / DSTC (dynamic stability and traction control) control module Signal Specification
- Checking wiring and terminals Checking Wiring And Terminals
Was a fault detected?
Yes - Verification
No - Checking wiring and sensors
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Checking wiring and sensors
Check the wiring between the lateral acceleration sensor connector:
- terminal #1 and control module terminal #40 (terminal #A40)
- terminal #2 and control module terminal #9 (terminal #A9)
- terminal #3 and control module terminal #25 (terminal #A25).
Check for an open-circuit, a short-circuit to ground and a short-circuit to supply voltage.
Hint: Check the lateral acceleration sensor, with the ignition on, by measuring the signal from the sensor between:
- terminals #9 and #40 on the breakout box. The voltage must be approximately 2.5 V
- terminals #9 and #25 on the breakout box. The voltage must be approximately 5 V.
Remedy as necessary.
Other information:
- To connect the breakout box, see Connecting the ABS/DSTC breakout box Pinout Values and Diagnostic Parameters
- To replace the lateral acceleration sensor, see Replacing the yaw rate sensor (1) and the lateral acceleration sensor in the center console (DSTC) Service and Repair
- For information about signals, see Signal specification, ABS / DSTC (dynamic stability and traction control) control module Signal Specification
- Checking wiring and terminals Checking Wiring And Terminals
Was a fault detected?
Yes - Verification
No - Checking wiring and sensors
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Checking wiring and sensors
Check the wiring between the control module and the connectors for the brake pressure sensors.
For brake pressure sensor 1:
- terminal #1 and control module terminal #28 (terminal #A28)
- terminal #2 and control module terminal #12 (terminal #A12)
- terminal #3 and control module terminal #43 (terminal #A43).
For brake pressure sensor 2:
- terminal #1 and control module terminal #26 (terminal #A26)
- terminal #2 and control module terminal #10 (terminal #A10)
- terminal #3 and control module terminal #41 (terminal #A41).
Check for an open-circuit, a short-circuit to ground and a short-circuit to supply voltage.
Hint: Check the brake pressure sensors, with the ignition on, by measuring the signal from the sensor between:
Brake pressure sensor 1:
- terminals #12 and #28 on the breakout box. The voltage must be approximately 2.5 V
- terminals #28 and #43 on the breakout box. The voltage must be approximately 5 V.
Hint: Brake pressure sensor 2:
- terminals #10 and #26 on the breakout box. The voltage must be approximately 2.5 V
- terminals #26 and #41 on the breakout box. The voltage must be approximately 5 V.
Remedy as necessary.
Other information:
- To connect the breakout box, see Connecting the ABS/DSTC breakout box Pinout Values and Diagnostic Parameters
- To replace brake pressure sensors 1 and 2, see Pressure sensor, master cylinder, replacing Service and Repair
- For information about signals, see Signal specification, ABS / DSTC (dynamic stability and traction control) control module Signal Specification
- Checking wiring and terminals Checking Wiring And Terminals
Was a fault detected?
Yes - Verification
No - No Fault Found
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Verification
Verification
Verification
Hint: After the repair it is necessary to check that the fault has been rectified.
- Ignition off.
- Connect the connectors, install the components, etc.
- Test-drive the car as described in Test driving Test Driving.
- Ignition on.
- Read the status of the diagnostic trouble code.
Is the status of the diagnostic trouble code intermittent?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFIED - Fault Found
VERIFICATION FAILED - Fault-tracing information
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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
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FAULT-TRACING FAILED - FAULT-TRACING FAILED
Attempt New Test - Checking the connector
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