Checking the function of the Control Module

Checking the function of the control module

STC or DSTC




Question

Question

Does the car have a DSTC system?

Yes - DSTC

No - STC

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STC - Checking the control module

DSTC - DSTC

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Checking the control module








- Ignition off.
- Connect the control module.
- Ignition on.
When the ignition is switched on, the control module lights the ABS warning lamp. Check that the warning lamp goes out after approximately 2 seconds.
If the warning lamp goes out, the cause of the fault was loose connections in the control module connector. Check the control module connector for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
A fault has been registered if the warning lamp does not go out. Try a new control module according to Control module (ABS), replacing Brake Control Module (BCM), Replacing.

Select Continue when the fault has been remedied.

Continue - Verification

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Verification




Verification

Verification

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




- Ignition off.
- Reconnect connectors, reinstall components.
- Ignition on.
When the ignition is switched on the control module lights the ABS warning lamp. Check that the warning lamp goes out after approximately 2 seconds.

Note! The warning lamp will not go out if a fault has been stored in the control module.





Does the ABS warning lamp light and go out shortly afterwards?

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 be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.
Complete the fault-tracing for those fault or try again.

Do you want to terminate fault-tracing at this time?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the control module

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DSTC





Checking the control unit function

Checking the control unit








- Ignition off.
- Connect the control unit.
- Ignition on.
When the ignition is turned on, the control unit turns on the ABS warning lamp. Check that the warning lamp goes out after approximately 2 seconds.
If the warning lamp goes out, the reason for the fault has been poor contact in the control unit connector. Check the control unit connector for contact resistance and oxidation, as described in Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
If the warning lamp has not gone out, a fault has been recorded. Test with a new control unit, as described in Replacing the control module for ABS and dynamic stability and traction control (DSTC) Replacing the Control Module for ABS and Dynamic Stability and Traction Control (DSTC).

Select Continue when the fault has been rectified.

Continue - Verification

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Verification
Verification
VERIFIED - Fault Found

VERIFICATION FAILED - Trouble-shooting information

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Trouble-shooting information
Information
FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the control unit

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

FAULT FOUND - Fault Found

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