Part 2
Checking the stop (brake) lamp switch (Continued)
Checking for an open-circuit
- Ignition off.
- Check the cable between stop (brake) lamp switch connector terminal #3 (terminal #2 on cars with shift lock) and the stop (brake) lamp bulbs for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault. Replace the bulb failure warning sensor if no fault is found.
Continue - Verification
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Checking the response code
- Ignition off.
- Connect the stop (brake) lamp switch
- Connect the Volvo Scan Tool (ST) to the data link connector (DLC).
- Ignition on.
- Activate the Scan Tool (ST) in MODE 2.
- Set the switch to the OFF position.
- Depress the brake pedal.
- Check whether response code 1-3-2 is obtained.
Is response code 1-3-2 obtained?
Yes - FAULT FOUND
No - Replacing the component
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Replacing the component
- Ignition off.
- Replace with a new bulb failure warning sensor.
Continue - Verification
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Checking the power supply to the control module
- Ignition off.
- Stop (brake) lamp switch connected.
- Brake pedal unaffected.
- Disconnect the control module.
- Ignition on.
Connect a voltmeter between control module connector terminal 7 and ground.
The voltmeter should read approximately 0 V.
OK - Checking the resistance in the signal cable
Not OK - Checking for a short-circuit
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Checking for a short-circuit
- Ignition off.
- Check the cable between stop (brake) lamp switch connector terminal #3 (terminal #2 on cars with shift lock) and control module connector terminal #7 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Continue - Verification
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Checking the resistance in the signal cable
- Ignition off.
- Control module disconnected.
- Disconnect the stop (brake) lamp switch.
Connect an ohmmeter between stop (brake) lamp switch connector terminal 3 (terminal 2 on cars with shift lock) and control module connector terminal 7.
The ohmmeter should read approximately 0 ohms.
OK - Checking the control module connectors
Not OK - Checking for an open-circuit
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Checking for an open-circuit
- Ignition off.
- Check the cable between stop (brake) lamp switch connector terminal #3 (terminal #2 on cars with shift lock) and control module connector terminal #7 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Continue - Verification
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Checking the control module connectors
- Ignition off.
- Check control module connector terminal #7 for contact resistance and oxidation and for loose connections. Remedy contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault. Remedy loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring And Terminals. Intermittent Faults.
- Connect the control module.
- Connect the stop (brake) lamp switch
- Connect the Volvo Scan Tool (ST) to the data link connector (DLC).
- Ignition on.
- Activate the Scan Tool (ST) in MODE 2.
- Set the switch to the OFF position.
- Depress the brake pedal.
- Check whether response code 1-3-2 is obtained.
Is response code 1-3-2 obtained?
Yes - Fault-tracing information
No - Replacing the component
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Fault-tracing information
- Ignition off.
- This response code was not obtained because of loose connections in the control module connector.
Continue - FAULT FOUND
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Replacing the component
- Ignition off.
- Replace with a new control module according to Control module Service and Repair.
Continue - Verification
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Verification
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 - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking the response code
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DONE - Checking the response code
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