Signal Too High. Permanent Fault
Signal too high. Permanent fault
EFI-212 Front heated oxygen sensor (HO2S), signal
Checking ground terminals
Connector A
951 1351 ADAPTOR 86-PIN 951 1351 Adaptor 86-Pin 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428
Connecting up the Test box to Motronic 4.3
Is the test box connected to the control module?
Yes - FAULT FOUND
No -
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Connection of break-out box to connector A (black)
- Switch off ignition.
- Disconnect ECM.
Note! The ECM must not be removed from the car until the main relay has interrupted the supply. This may take up to 150 seconds after the ignition has been switched off.
- Plug adapter 951 1351 ADAPTOR 86-PIN 951 1351 Adaptor 86-Pin into ECM base and connect break-out box 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 to adapter.
Press Continue.
Continue -
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Checking ground terminals
- Switch off ignition.
- Switch off all power consumers, such as interior lighting and radio.
- Use ohmmeter to measure resistance between battery negative terminal and
- #13 (#A13) on break-out box
- #28 (#A28) on break-out box
- #42 (#A42) on break-out box
Instrument should indicate approx. 0 ohms in all cases.
OK - Resume fault tracing at point of interruption.
No Fault Found
Not OK - Check ground terminals 31/32 and 31/33 at rear of engine and associated wiring for open-circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and for contact resistance and oxidation as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.Check ground lead between engine and chassis for open-circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and for contact resistance and oxidation as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
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Checking for open-circuit, contact resistance and oxidation
- Check ground terminals 31/32 and 31/33 at rear of engine and associated wiring for open-circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and for contact resistance and oxidation as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Check ground lead between engine and chassis for open-circuit as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , and for contact resistance and oxidation as per Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Press Continue when fault is repaired.
Continue -
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Verification
Hint: After repair, it is necessary to check that the fault has been corrected.
Perform as described below.
- Switch off ignition.
- Switch off all power consumers, such as interior lighting and radio.
- Use ohmmeter to measure resistance between battery negative terminal and
- #13 (#A13) on break-out box
- #28 (#A28) on break-out box
- #42 (#A42) on break-out box
Instrument should indicate approx. 0 ohms in all cases.
OK - FAULT FOUND
Not OK -
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Troubleshooting 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
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Attempt New Test -
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FAULT FOUND - Checking the signal cable (-), front heated oxygen sensor (HO2S)
No Fault Found - Checking the signal cable (-), front heated oxygen sensor (HO2S)
FAULT-TRACING FAILED - Checking the signal cable (-), front heated oxygen sensor (HO2S)
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Checking the signal cable (-), front heated oxygen sensor (HO2S)
- Connect control module.
- Ignition on.
Connect a voltmeter between terminals #33 (#A33) and #42 (#A42) on the breakout box.
The voltmeter should read approximately 1.0 V.
OK - Checking the signal cable (+), front heated oxygen sensor (HO2S)
Not OK - Checking front heated oxygen sensor (HO2S)
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Checking front heated oxygen sensor (HO2S)
- Ignition off.
- Disconnect front heated oxygen sensor (HO2S) (black connector).
- Ignition on.
Connect a voltmeter between terminals #33 (#A33) and #42 (#A42) on the breakout box.
The voltmeter should read approximately 1.0 V.
OK - Replacing component
Try a new front heated oxygen sensor (HO2S). Then continue with Verification.
Not OK - Checking the rear heated oxygen sensor (HO2S)
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Replacing component
- Try a new heated oxygen sensor (HO2S).
Continue - Verification
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Checking the rear heated oxygen sensor (HO2S)
- Ignition off.
- Front heated oxygen sensor (HO2S) disconnected.
- Disconnect rear heated oxygen sensor (HO2S) (gray connector).
- Ignition on.
Connect a voltmeter between terminals #33 (#A33) and #42 (#A42) on the breakout box.
The voltmeter should read approximately 1.0 V.
OK - Replacing component
Try a new rear heated oxygen sensor (HO2S). Then continue with Verification.
Not OK - Checking for a short-circuit
Check cable between the front heated oxygen sensor (HO2S) terminal 3 and engine control module (ECM) #A33 and the cable between the rear heated oxygen sensor (HO2S) terminal 3 and engine control module (ECM) #A19 for a short-circuit to voltage supply according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
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Checking the signal cable (+), front heated oxygen sensor (HO2S)
- Ignition on.
Connect a voltmeter between terminals #32 (#A32) and #42 (#A42) on the breakout box.
The voltmeter should read approximately 1.5 V.
OK - Checking signal cable (+), rear heated oxygen sensor (HO2S)
Not OK - Checking front heated oxygen sensor (HO2S)
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Checking front heated oxygen sensor (HO2S)
- Ignition off.
- Disconnect front heated oxygen sensor (HO2S) (black connector).
- Ignition on.
Connect a voltmeter between terminals #32 (#A32) and #42 (#A42) on the breakout box.
The voltmeter should read approximately 1.5 V.
OK - Replacing component
Try a new front heated oxygen sensor (HO2S). Then continue with Verification.
Not OK - Checking for a short-circuit
Check cable between front heated oxygen sensor (HO2S) terminal 4 and control module #A32 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
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Checking for a short-circuit
- Check cable between front heated oxygen sensor (HO2S) terminal 4 and control module #A32 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 (+), rear heated oxygen sensor (HO2S)
- Ignition off.
- Disconnect rear heated oxygen sensor (HO2S) (gray connector).
- Ignition on.
Connect a voltmeter between terminals #34 (#A34) and #42 (#A42) on the breakout box.
The voltmeter should read approximately 1.5 V.
OK - Replacing component
Try a new rear heated oxygen sensor (HO2S). Then continue with Verification.
Not OK - Checking for a short-circuit
Check cable between rear heated oxygen sensor (HO2S) terminal 4 and control module #A34 for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Then continue with Verification.
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Checking for a short-circuit
- Check cable between rear heated oxygen sensor (HO2S) terminal 4 and control module #A34 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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Replacing component
- Try a new heated oxygen sensor (HO2S).
Continue - Verification
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Checking for a short-circuit
- Check cable between the front heated oxygen sensor (HO2S) terminal 3 and engine control module (ECM) #A33 and the cable between the rear heated oxygen sensor (HO2S) terminal 3 and engine control module (ECM) #A19 for a short-circuit to voltage supply according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
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.
- Front and rear heated oxygen sensors (HO2S) connected.
- Control module connected.
- Disconnect the Volvo Scan Tool (ST) from the VIDA station and use it in stand-alone mode.
- Start the engine and idle it.
- Go into the Diagnostic Test Mode (DTM) menu.
- Watch EFI-153 and EFI-212. Wait until the status of EFI-153 and EFI-212 switch to tested. This can take up to 15 minutes after the engine has been started.
- Read off diagnostic trouble codes (DTCs).
This can take up to 15 minutes after the engine has been started.
If EFI-153 or EFI-212 are stored they should have intermittent status.
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 the signal cable (-), front heated oxygen sensor (HO2S)
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