Part 2
Checking the stop (brake) light switch (Continued)
Checking response code
- Ignition off.
- Connect stop (brake) light switch.
- Ignition on.
- Activate Diagnostic Test Mode (DTM) 2.
- ON/OFF switch to the OFF position
- Depress brake pedal.
- Check whether response code 1-3-2 is returned.
Response code 1-3-2 returned?
Yes - FAULT FOUND
No - Replacing component
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Replacing component
- Ignition off.
- Replace bulb failure warning sensor.
Continue - Verification
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Checking power supply to control module
- Ignition off.
- Stop (brake) light switch connected.
- Brake pedal up.
- Disconnect control module.
- Ignition on.
Connect a voltmeter between control module connector terminal 6S and ground.
The voltmeter should read approx. 0 V.
OK - Checking signal cable resistance
Not OK - Checking for a short-circuit
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Checking for a short-circuit
- Ignition off.
- Check cable between stop (brake) light switch connector terminal 2 and control module connector terminal 6S 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 signal cable resistance
- Ignition off.
- Control module disconnected.
- Disconnect stop (brake) light switch.
Connect an ohmmeter between stop (brake) light switch connector terminal 2 and control module connector terminal 6S.
The ohmmeter should read approx. 0 ohms.
OK - Checking control module connector
Not OK - Checking for an open-circuit
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Checking for an open-circuit
- Ignition off.
- Check cable between stop (brake) light switch connector terminal 2 and control module connector terminal 6S 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 control module connector
- Ignition off.
- Check control module connector terminal 6S for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
- Connect control module.
- Connect stop (brake) light switch.
- Ignition on.
- Activate Diagnostic Test Mode (DTM) 2.
- ON/OFF switch to the OFF position
- Depress brake pedal.
- Check whether response code 1-3-2 is returned.
Response code 1-3-2 returned?
Yes - Fault-tracing information
No - Replacing component
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Fault-tracing information
- Ignition off.
- The response code was not returned because of loose connections in the control module connector.
Continue - FAULT FOUND
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Replacing component
- Ignition off.
- Try a new control module according to Replacing control module Service and Repair.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied as follows:
- Ignition off.
- Reconnect connectors, reinstall components.
- Connect control module.
- Selector switch in OFF position.
- Ignition on.
- Activate Diagnostic Test Mode (DTM) 2.
- ON/OFF switch to the OFF position
- Depress brake pedal.
- Check whether response code 1-3-2 is returned.
Response code 1-3-2 returned?
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 - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking response code
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Connection of Volvo Scan Tool (ST)
Connection of Volvo ST
- Ignition off.
- Insert blue memory cassette into Volvo ST.
- Connect adapter 951 1457-5 to cable 951 1458-3.
- Connect VIDA communication lead between the adapter and the VIDA PC.
Is the data link connector (DLC) located in passenger compartment?
Yes - Connection to DLC
No - Connection to DLC
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Connection to DLC
- Connect Volvo ST cable (p/n 951 1458-3) to the adapter (p/n 951 1459-1) for use in the engine compartment.
- Connect the adapter to DLC A or B, see DLC DLC.
- Connect the adapter supply lead to battery.
- Switch on Volvo ST.
Press Continue.
Continue - DONE
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Connection to DLC
- Connect Volvo ST cable (p/n 951 1458-3) to the DLC in passenger compartment.
- Switch on Volvo ST.
Press Continue.
Continue - DONE
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DONE - Checking response code
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Adjusting the stop (brake) light switch
- Adjust the stop (brake) light switch early type according to Stop (brake) light switch early type Adjustments the later type is self-adjusting.
- Ignition off.
- Connect stop (brake) light switch.
- Ignition on.
- Connect a voltmeter between stop (brake) light switch connector terminal 2 and ground.
Voltmeter should read battery voltage when the brake pedal is depressed more than 5-10 mm.
OK - Checking the stop (brake) light bulbs
Not OK - Replacing component
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