Signal Missing. Permanent Fault
Signal missing. Permanent fault
EFI-541 Canister purge (CP) valve, signal
Checking power cable
- Ignition off.
- Disconnect connector from canister purge (CP) valve.
- Ignition on.
Connect a voltmeter between canister purge (CP) valve connector terminal 1 and ground.
The voltmeter should read battery voltage.
OK - Checking canister purge (CP) valve
Not OK - Checking for an open-circuit
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Checking for an open-circuit
- Check power cable between canister purge (CP) valve terminal 1 and main relay (2/32) terminal 3 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 canister purge (CP) valve
- Ignition off.
Connect an ohmmeter to canister purge (CP) valve between terminal 1 and 2.
The ohmmeter should read 22-30 ohms.
OK - Connecting breakout box, A
Not OK - Replacing component
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Connecting breakout box, A
Connecting breakout box, connector A
Connecting the breakout box
Is the breakout box connected to the Motronic 4.4 connector?
Yes - No Fault Found
No - Connecting breakout box to Motronic 4.4 connector A (black)
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Connecting breakout box to Motronic 4.4 connector A (black)
- Ignition off.
- Disconnect control module.
Note! The engine control module (ECM) must not be removed from the car until the main relay has interrupted its power supply. This may take up to 150 seconds (cars with an immobilizer 245 seconds) after the ignition has been switched off.
Connect adapter 951 1351 ADAPTOR 86-PIN 951 1351 Adaptor 86-Pin to engine control module (ECM) connector and connect breakout box 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 to adapter.
Continue - Checking ground terminals
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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:
- #13 (#A13) on the breakout box.
- #28 (#A28) on the breakout box.
- #42 (#A42) on the breakout box.
The ohmmeter should read approximately 0 ohms for all readings.
OK - Reading is OK
Not OK - Checking for an open-circuit
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Checking for an open-circuit
- Check ground terminals 31/32 and 31/33 at rear of engine and their cables for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Check ground lead between engine and chassis for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - No Fault Found
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Reading is OK
- Return to the fault-tracing procedure where it was interrupted.
Continue - No Fault Found
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FAULT FOUND - Checking the signal cable
No Fault Found - Checking the signal cable
FAULT-TRACING FAILED - Checking the signal cable
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Checking the signal cable
- Ignition off.
- Breakout box connected.
Connect an ohmmeter between terminal #39 (A39) on the breakout box on the breakout box and canister purge (CP) valve connector terminal 2.
The ohmmeter should read approximately 0 ohms.
OK - Fault-tracing information
Not OK - Checking for an open-circuit
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Checking for an open-circuit
- Check cable between canister purge (CP) valve terminal 2 and engine control module (ECM) #A39 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Fault-tracing information
The cause of the fault has been loose connections in the engine control module (ECM) and/or canister purge (CP) valve connectors.
- Check connectors for contact resistance and oxidation and remedy in accordance with Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue - Verification
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Replacing component
- Try a new canister purge (CP) valve.
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.
- Canister purge (CP) valve and control module connected.
- Ignition on.
- Select Volvo Scan Tool (ST) to activate canister purge (CP) valve.
- The canister purge (CP) valve clicks when it is activated.
Is the canister purge (CP) valve working?
OK - VERIFIED
Not OK - 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 power cable
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