Checking Signal To Control Module
Checking signal to control module
Connecting the breakout box
Connecting the breakout box
Connecting the breakout box
- Ignition off.
- Disconnect the ABS control module by pressing in the catch on the rear edge of the cover (wheel arch side). Carefully turn the cover upwards so that the locking catches release.
- Check control module and control module connector to ensure that: Male and female terminals are undamaged and properly attached (cannot be pressed in). Female terminal cables are correctly connected to the terminals.
- Pay particular attention to the terminals related to the diagnostic trouble code (DTC)/symptom.
- Connect adapter 951 1354 Adapter 25-pin ABS 850 951 1354 Adapter 25-Pin ABS 850 to the control module connector (wiring side) and connect breakout box 951 1428 Breakout box 951 1428 Breakout Box to the adapter.
- Control module disconnected.
- Then check ground terminals.
Continue - Checking ground terminals
------------------------
Checking ground terminals
- Ignition off.
- Switch off all equipment that takes power from the battery (courtesy lighting, radio etc).
- Connect an ohmmeter between battery negative terminal and #8 and #24 on the breakout box.
The ohmmeter should read approximately 0 ohms for all readings.
OK - Return to the fault-tracing procedure where it was interrupted.
Reading is OK
Not OK - Check ground terminal 1/1 (battery negative terminal) and cable between ground terminal and control module #8 and #24, for an open-circuit and contact resistance.-Return to the fault-tracing procedure where it was interrupted.
Value is not OK
------------------------
Reading is OK
- Return to the fault-tracing procedure where it was interrupted.
Continue - FAULT FOUND
------------------------
Value is not OK
- Check ground terminal 1/1 (battery negative terminal) and cable between ground terminal and control module #8 and #24, for an open-circuit and contact resistance.
- Return to the fault-tracing procedure where it was interrupted.
Continue - FAULT FOUND
------------------------
FAULT FOUND - Checking short-circuit to supply voltage in signal cable
No Fault Found - Checking short-circuit to supply voltage in signal cable
FAULT-TRACING FAILED - Checking short-circuit to supply voltage in signal cable
-------------------------------------------------
Checking short-circuit to supply voltage in signal cable
- Ignition off.
- Expose combined instrument panel.
- Disconnect combined instrument panel connector B.
- Control module disconnected.
- Ignition on.
Connect a voltmeter between #16 and #8 on the breakout box.
The voltmeter should read approximately 0 V.
OK - Checking signal cable resistance
Not OK - Checking for a short-circuit
-------------------------------------------------
Checking for a short-circuit
Check cable between combined instrument panel connector terminal B6 and control module #16 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - Verification
-------------------------------------------------
Checking signal cable resistance
- Ignition off.
- Control module disconnected.
Connect an ohmmeter between combined instrument panel connector terminal B6 and #16 on the breakout box.
The ohmmeter should read approximately 0 ohms.
OK - No Fault Found
Not OK - Checking for an open-circuit in the cable
-------------------------------------------------
Checking for an open-circuit in the cable
Check cable between combined instrument panel connector terminal B6 and control module #16 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - 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 2 seconds.
Note! The warning lamp will not go out if a fault has been stored in the control module.
Does the warning lamp light and go out shortly afterwards?
Yes - FAULT FOUND
No - Fault-tracing information
-------------------------------------------------
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 - Exit fault-tracing
No - Attempt New Test
------------------------
Attempt New Test - Checking short-circuit to supply voltage in signal cable
-------------------------------------------------