Part 3
Check the start system
Exit fault-tracing
Exit fault-tracing
The information below is conditional on no relevant diagnostic trouble codes being stored for the symptom and that all diagnostic tests for the symptom have been performed.
The fault must be diagnosed and remedied.
If no malfunction has been found in any of the diagnostic tests, report the result of the troubleshooting to the sales company/importer according to normal report procedure.
Continue - VERIFIED
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DONE - DONE
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Checking the diagnostic trouble codes (DTCs)
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Checking the diagnostic trouble codes (DTCs)
- Ignition off.
- Reconnect the connector to the Steering Wheel Module (SWM).
- Insert the key in the ignition switch.
- Turn the ignition key to position II.
Click on the VCT2000 symbol.
Check if any of the following diagnostic trouble codes have been generated in the vehicle.
Remedy as necessary.
- CEM-DE11.
- CEM-E000.
- CEM-E001.
- CEM-6C54.
- ECM, Communication with Central Electronic Module (CEM).
- ECM, Communication with Brake Control Module (BCM).
Other diagnostic trouble codes (DTCs) that may be stored in the control modules in the vehicle are not relevant for the symptom.
If none of the above diagnostic trouble codes are detected, proceed with general troubleshooting of the CAN-net according to instructions under TROUBLESHOOTING/GENERAL DIAGNOSTICS AND TESTS.
Select Continue.
Continue - DONE
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Replacing the Steering Wheel Module (SWM)
If no fault is found on the cables or connections this means that the Steering Wheel Module (SWM) is defective and must be replaced.
Other information
- Checking wiring and terminals Checking Wiring And Terminals
Select Continue.
Continue - Verification
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Verification
Note! After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reinstall the connectors, components etc.
Check the operation of the steering column lock. Insert the ignition key in the ignition switch.
The steering column lock must be unlocked. It must be possible to turn the steering wheel.
Then check that the car can be started.
Can the vehicle be started?
Yes - VERIFIED
No - Fault-tracing information
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Fault-tracing information
The fault must be diagnosed and remedied.
If no malfunction has been found in any of the diagnostic tests, report the result of the troubleshooting to the sales company/importer according to normal report procedure.
Select Continue.
Continue - FAULT-TRACING FAILED
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Checking the diagnostic trouble codes (DTCs)
- Ignition switch position II.
Click the VCT2000 symbol to read diagnostic trouble codes (DTCs).
Check that diagnostic trouble codes (DTCs) starting with CEM-DFXX are stored in the vehicle. For example, CEM-DF04, CEM-DF07.
Remedy these diagnostic trouble codes (DTCs) first.
Other information
Were any defects found?
Yes - Checking text message in Driver Information Module (DIM)
No - Checking cable harness
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Checking cable harness
- Ignition off.
Check the cable harness in the left/right front door.
Hint: The speaker can be removed to visually check the cable harness.
Check fuses.
Remedy as necessary.
Other information
- For information about fuses, see the wiring diagram.
- Loudspeaker, side door front Loudspeaker, Front Side Door
- Lift mechanism, front door Service and Repair
Was a fault detected?
Yes - Verification
No - Checking text message in Driver Information Module (DIM)
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Checking the diagnostic trouble codes (DTCs)
- Ignition switch position II.
Click the VCT2000 symbol to read diagnostic trouble codes (DTCs).
Check if diagnostic trouble code CEM-1A41 is detected.
Are there relevant diagnostic trouble codes (DTCs)?
Yes - Replacing the Start Control Unit (SCU)
No - Other fault-tracing
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Other fault-tracing
If no fault has been detected, continue with the following fault tracing procedures.
The fault tracing procedures should be performed in numerical order.
If no fault is detected during each fault tracing procedure, proceed to the next one.
See VIDA for reference information.
1. Check the battery charge status, connections to the battery and chassis and the battery cables for contact resistance and oxidation.
2. Check cables and fuses.
3. Check the starter motor relay.
4. Check the starter motor.
5. Check the start inhibitor function in the gear position sensor, only applies to vehicles with automatic transmission.
Select Continue.
Continue - Verification
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Fault-tracing information
- Troubleshoot diagnostic trouble code CEM-6C41 according to DIAGNOSTICS/DIAGNOSTIC TROUBLE CODE.
Select Continue.
Continue - DONE
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Checking chassis number
- Check the chassis number according to DIAGNOSTICS/DETAILS.
Is the chassis number lower than 095696 if it is an S40 or lower than 094791 if it is a V50?
Select an alternative.
Yes - Downloading new software
No - Checking the ignition switch
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Downloading new software
- Download new software in Central electronic module (CEM) .
Select Continue.
Continue - Checking the ignition switch
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Checking the ignition switch
- Click on the VCT2000 symbol.
- Check that the status of the ignition switch corresponds to all key positions.
Compare with table in link below.
Other information
- For table,
Description of switch for start control unit (SCU) Description Of Switch For Start Control Unit (SCU)
Are all key positions OK?
Yes - Verification
No - Checking the ignition switch
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Checking the ignition switch
- Change to another key belonging to the vehicle.
- Click on the VCT2000 symbol.
- Check that the status of the ignition switch corresponds to all key positions.
Compare with table in link below.
If key positions' status cannot be read out, or if the shown key position is invalid, the Start Control Unit (SCU) is probably defective.
Other information
- For table,
Description of switch for start control unit (SCU) Description Of Switch For Start Control Unit (SCU)
Are all key positions OK?
Yes - Programming new keys
No - Replacing the Start Control Unit (SCU)
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Programming new keys
- Replace the defective key and program a new key for the vehicle .
Select Continue.
Continue - Verification
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Checking the connector
- Check that the 3-pin LIN-connector is assembled correctly.
Select Continue.
Continue - Checking the diagnostic trouble codes (DTCs)
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Checking the diagnostic trouble codes (DTCs)
- Ignition switch position II.
- Click the VCT2000 symbol to read diagnostic trouble codes (DTCs).
Check if diagnostic trouble code CEM-1A41 is detected.
Are there relevant diagnostic trouble codes (DTCs)?
Yes - Replacing the Start Control Unit (SCU)
No - Fault-tracing information
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Fault-tracing information
- Ignition off.
- Check relevant fuses for Central electronic module (CEM) and Start control module (SCU).
- Check cables and connections to Central electronic module (CEM).
- Check cables and connections to Start control module (SCU).
Other information
- Checking wiring and terminals Checking Wiring And Terminals
Select Continue.
Continue - Checking the ignition switch
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Replacing the Start Control Unit (SCU)
Check the cables and connections between the Start Control Unit (SCU) and the Central electronic module (CEM).
Check the fuse for the Start Control Unit (SCU).
If no fault is found on the cables or connections this means that the Start Control Unit (SCU) is defective and must be replaced.
Other information
- Ignition lock Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals
- For further information about the fuses and relays, see the Wiring Diagram.
Select Continue.
Continue - Checking the ignition switch
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Checking the ignition switch
- Click on the VCT2000 symbol.
- Check that the status of the ignition switch corresponds to all key positions.
Compare with table in link below.
Other information
- For table,
Description of switch for start control unit (SCU) Description Of Switch For Start Control Unit (SCU)
Are all key positions OK?
Yes - Verification
No - Fault-tracing information
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Replacing the Start Control Unit (SCU)
Check cables and connections to Start control module (SCU).
Check the fuse for the Start Control Unit (SCU).
If no fault is found on the cables or connections this means that the Start Control Unit (SCU) is defective and must be replaced.
Other information
- Ignition lock Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals
- For further information about the fuses and relays, see the Wiring Diagram.
Select Continue.
Continue - Checking the ignition switch
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Fault-tracing information
Is the vehicle equipped with a Gas discharge lamp module (GDL)?
See DIAGNOSTICS/NETWORK.
Select an alternative.
Yes - Check LIN diagnostic trouble codes (DTCs)
No - Replacing the central electronic module (CEM)
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