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Contents Section: Testing & Diagnostics All sections

Engine Control Module (ECM) Diagnostic Trouble Codes - 1 of 9: Other Volvo V50 I рестайлинг

Testing & Diagnostics 8 illustrations ~12120 words

REPLACING THE COMPONENT

The engine control module (ECM) has registered an internal fault.

If the fault is intermittent, it has been registered previously but is no longer present. Intermittent faults can be caused by interference at start up of the engine control module (ECM) or may be a different type of fault which occurs on different occasions. The fault is evaluated depending on how it occurs. Replace the engine control module (ECM) if the fault recurs.

Replace the engine control module (ECM) in the event of a permanent fault.

Remedy as necessary.

Other information

  1. see «ENGINE CONTROL MODULE (ECM)»(ref-466594-S40317974462012042500000)
  1. Continue Refer to «INFORMATION»(ref-466646-S04961881682012042500000)

FAULT-TRACING INFORMATION

In case of this defect, troubleshooting is not followed by verification.

The information can be displayed again or the fault-tracing for this fault can be interrupted.

VERIFICATION

HINT: After carrying out the repair, check that the fault has been remedied.

Scheme 27

Scheme 27
Scheme 27
  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Activate reading the value from the manifold absolute pressure (MAP) sensor and the atmospheric pressure sensor. Check the difference between the pressure readings. Check that the difference is not greater than 70 hPa. The fault has been remedied if the difference is 70 hPa or less. The function is faulty if the difference is greater than 70 hPa.

Is the difference 70 hPa or less?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S11459130792012042500000)

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.

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Activate reading the value from the manifold absolute pressure (MAP) sensor and the atmospheric pressure sensor. Check the difference between the pressure readings. Check that the difference is not greater than 70 hPa. The fault has been remedied if the difference is 70 hPa or less. The function is faulty if the difference is greater than 70 hPa.

Is the difference 70 hPa or less?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S35863441402012042500000)

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.

INFORMATION

No fault-tracing has been developed for this diagnostic trouble code (DTC). The diagnostic trouble code (DTC) for this fault is stored first in the central electronic module (CEM), then in the engine control module (ECM). This diagnostic trouble code (DTC) cannot be erased before the diagnostic trouble code (DTC) in the central electronic module (CEM) has been remedied and erased.

First read off the diagnostic trouble codes (DTCs) in the central electronic module (CEM). Fault-trace and remedy as necessary. This diagnostic trouble code (DTC) can then be erased.

There is no fault-tracing for this diagnostic fault code (DTC).

The engine control module (ECM) has registered an internal fault.

If the fault is intermittent, it has been registered previously but is no longer present. Intermittent faults can be caused by interference at start up of the engine control module (ECM) or may be a different type of fault which occurs on different occasions. The fault is evaluated depending on how it occurs. Replace the engine control module (ECM) if the fault recurs.

Replace the engine control module (ECM) in the event of a permanent fault.

see ENGINE CONTROL MODULE (ECM)

Remedy as necessary.

  1. Continue Refer to «INFORMATION»(ref-466646-S05659260102012042500000)

In case of this defect, troubleshooting is not followed by verification.

The information can be displayed again or the fault-tracing for this fault can be interrupted.

INTERNAL FAULT

See INTERNAL FAULT

See INTERNAL FAULT

See INTERNAL FAULT

See INTERNAL FAULT

See INTERNAL FAULT

See INTERNAL FAULT

See INTERNAL FAULT

See INTERNAL FAULT

See INTERNAL FAULT

See INTERNAL FAULT

See INTERNAL FAULT

CHECKING THE STATUS

  1. Ignition on. Check whether the fault is permanent or intermittent by reading off the signal from the manifold absolute pressure (MAP) sensor. HINT: The intake air temperature (IAT) sensor is integrated in the mass air flow (MAF) sensor. Check that the signal is within its permitted range. The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S37295560462012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the manifold absolute pressure (MAP) sensor. Check that the signal is within its permitted range.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S06308472812012042500000)

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.

  1. Ignition on. Check whether the fault is permanent or intermittent by reading off the signal from the manifold absolute pressure (MAP) sensor. HINT: The intake air temperature (IAT) sensor is integrated in the mass air flow (MAF) sensor. Check that the signal is within its permitted range. The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S03266994142012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the manifold absolute pressure (MAP) sensor. Check that the signal is within its permitted range.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S40527985232012042500000)

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.

  1. Ignition on. Check whether the fault is permanent or intermittent by reading off the signal from the manifold absolute pressure (MAP) sensor. HINT: The intake air temperature (IAT) sensor is integrated in the mass air flow (MAF) sensor. Check that the signal is within its permitted range. The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S06036916062012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the manifold absolute pressure (MAP) sensor. Check that the signal is within its permitted range.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S08590371892012042500000)

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.

  1. Ignition on. Check whether the fault is permanent or intermittent by reading off the signal from the manifold absolute pressure (MAP) sensor. HINT: The intake air temperature (IAT) sensor is integrated in the mass air flow (MAF) sensor. Check that the signal is within its permitted range. The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S10961900812012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the manifold absolute pressure (MAP) sensor. Check that the signal is within its permitted range.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S36704173252012042500000)

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.

CHECKING THE CONNECTOR

HINT: The intake air temperature (IAT) sensor is integrated in the mass air flow (MAF) sensor.

Check the intake air temperature (IAT) sensor connector and terminals. Check for contact resistance. Check for oxidation.

Remedy as necessary.

Other information

  1. see «MASS AIR FLOW (MAF) SENSOR»(ref-466648-S27926788382012042500000)
  2. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

Scheme 28

Scheme 28
Scheme 28
  1. Continue Refer to «VERIFICATION»(ref-466646-S15831362852012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the manifold absolute pressure (MAP) sensor. Check that the signal is within its permitted range.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S39586638932012042500000)

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.

CHECKING THE INTAKE SYSTEM

Check the intake system for leakage. In particular, check the hoses and hose connectors between the mass air flow (MAF) sensor and the throttle unit. Check for leakage and damage.

Check the intake system for blockages (e. g. contaminants in the throttle).

Remedy as necessary.

Other information

  1. see «AIR LEAKS IN THE INTAKE SYSTEM, CHECKING»(ref-479169-S42610968362012061200000)
  2. see «MASS AIR FLOW (MAF) SENSOR»(ref-466648-S11977590702012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S11687878952012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on
  4. Read off the correction factor for mass air flow and note it
  5. Start the engine. Increase the engine speed (RPM) a couple of times. Read off the correction factor for mass air flow and check that the adaptation value is approaching 1. A normal value for the mass air flow correction factor is 0.8-1.2.

Is the value correct?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S20430790782012042500000)

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.

SIGNAL TOO HIGH

See SIGNAL TOO HIGH

FAULTY SIGNAL

See FAULTY SIGNAL

Check the mass air flow (MAF) sensor connector. Check for contact resistance and oxidation.

Remedy as necessary.

Other information

  1. see «MASS AIR FLOW (MAF) SENSOR»(ref-466648-S11977590702012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S03494728072012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on
  4. Read off the correction factor for mass air flow and note it
  5. Start the engine. Increase the engine speed (RPM) a couple of times. Read off the correction factor for mass air flow and check that the adaptation value is approaching 1. A normal value for the mass air flow correction factor is 0.8-1.2.

Is the value correct?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S18035216112012042500000)

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.

SIGNAL TOO LOW

See SIGNAL TOO LOW

HINT: After carrying out the repair, check that the fault has been remedied.

Scheme 29

Scheme 29: VERIFICATION
Scheme 29: VERIFICATION
  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on
  4. Check that the value for the air flow is correct. The value must be approximately 0 kg/h with the engine switched off
  5. Start the engine. Read off the air flow. The value can vary between 12-20 kg/h at idle speed, depending on the engine temperature and load. The flow can be more than 20 kg/h for a cold engine
  6. Increase the engine speed (RPM). Check that the air flow increases with increased engine speed.

Is the value correct?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S31085121882012042500000)

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.

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on
  4. Check that the value for the air flow is correct. The value must be approximately 0 kg/h with the engine switched off
  5. Start the engine. Read off the air flow. The value can vary between 12-20 kg/h at idle speed, depending on the engine temperature and load. The flow can be more than 20 kg/h for a cold engine
  6. Increase the engine speed (RPM). Check that the air flow increases with increased engine speed.

Is the value correct?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO VERIFICATION FAILED: 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.

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.

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on
  4. Check that the value for the air flow is correct. The value must be approximately 0 kg/h with the engine switched off
  5. Start the engine. Read off the air flow. The value can vary between 12-20 kg/h at idle speed, depending on the engine temperature and load. The flow can be more than 20 kg/h for a cold engine
  6. Increase the engine speed (RPM). Check that the air flow increases with increased engine speed.

Is the value correct?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S16742823932012042500000)

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.

FLOW TOO LOW

See FLOW TOO LOW

Check the mass air flow (MAF) sensor connector. Check for contact resistance and oxidation.

Check the intake system for leakage. In particular, check the hoses and hose connectors between the mass air flow (MAF) sensor and the throttle unit. Check for leakage and damage.

Check the intake system for blockages (e. g. contaminants in the throttle).

Remedy as necessary.

Other information

  1. see «AIR LEAKS IN THE INTAKE SYSTEM, CHECKING»(ref-479169-S42610968362012061200000)
  2. see «MASS AIR FLOW (MAF) SENSOR»(ref-466648-S11977590702012042500000)
  3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S29891919962012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on
  4. Read off the correction factor for mass air flow and note it
  5. Start the engine. Increase the engine speed (RPM) a couple of times. Read off the correction factor for mass air flow and check that the adaptation value is approaching 1. A normal value for the mass air flow correction factor is 0.8-1.2.

Is the value correct?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S40523831852012042500000)

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.

FAULT-TRACING

See FAULT-TRACING

See FAULT-TRACING

See FAULT-TRACING

See FAULT-TRACING

See FAULT-TRACING

See FAULT-TRACING

See FAULT-TRACING

Scheme 30

Scheme 30: CHECKING THE COMPONENT AND WIRING
Scheme 30: CHECKING THE COMPONENT AND WIRING

Scheme 31

Scheme 31
Scheme 31
  1. Check the boost pressure sensor connector. Check for contact resistance and oxidation. Check the signal cable between control module terminal #A38 (#A38) and boost pressure sensor terminal #4. Check for a short-circuit to supply voltage. Check for an open-circuit. Check the ground lead between control module terminal #A39 (#A39) and boost pressure sensor terminal #1. Check for an open-circuit. HINT: The diagnostic trouble code (DTC) may be caused by a damaged boost pressure sensor. Remedy as necessary. Other information: see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «TEMPERATURE AND MANIFOLD ABSOLUTE PRESSURE SENSOR (MAPT)»(ref-466594-S34563894352012042500000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S34977894512012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the value from the boost pressure sensor and the atmospheric pressure sensor. The signal from the atmospheric pressure sensor is used as a reference value in this test. Check that the boost pressure sensor value is approximately the same as the atmospheric pressure sensor value.

Is the value correct?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S11603491172012042500000)

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.

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the value from the boost pressure sensor and the atmospheric pressure sensor. The signal from the atmospheric pressure sensor is used as a reference value in this test. Check that the boost pressure sensor value is approximately the same as the atmospheric pressure sensor value.

Is the value correct?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S19821067442012042500000)

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.

See SIGNAL TOO HIGH

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the value from the boost pressure sensor and the atmospheric pressure sensor. The signal from the atmospheric pressure sensor is used as a reference value in this test. Check that the boost pressure sensor value is approximately the same as the atmospheric pressure sensor value.

Is the value correct?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S33359587422012042500000)

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.

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the value from the boost pressure sensor and the atmospheric pressure sensor. The signal from the atmospheric pressure sensor is used as a reference value in this test. Check that the boost pressure sensor value is approximately the same as the atmospheric pressure sensor value.

Is the value correct?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO VERIFICATION FAILED: 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.

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.

CHECKING THE COMPONENT

  1. Check the boost pressure sensor connector. Check for contact resistance and oxidation. Check that the boost pressure sensor is correctly installed and has not come loose. HINT: The diagnostic trouble code (DTC) may be caused by a damaged boost pressure sensor. Remedy as necessary. Other information: see «TEMPERATURE AND MANIFOLD ABSOLUTE PRESSURE SENSOR (MAPT)»(ref-466594-S34563894352012042500000) (B5254T3; 2005-2007), or «TEMPERATURE AND MANIFOLD ABSOLUTE PRESSURE SENSOR (MAPT)»(ref-466594-S37555462532012042500000) (B5254T7; 2008-2012) see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S26615323332012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, reinstall components etc.
  3. Test drive the vehicle on the road. Ensure that high boost pressure is reached (high load) so that the engine control module (ECM) can run the diagnostic.
  4. Connect VCT2000 to the data link connector (DLC) without switching off the engine. NOTE: If the engine is switched off, the stored fault status will be erased and the test drive will have to be repeated. Read off the diagnostic status and fault status for the diagnostic trouble code (DTC) by selecting the relevant diagnostic trouble code (DTC) from the list. Check the fault status for the diagnostic trouble code (DTC) when the diagnostic is "Complete". If the diagnostic is not complete after the test drive, further test driving is required. If the function is correct, the fault status must be "No fault found" when the diagnostic is complete.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S04370843962012042500000)

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.

SIGNAL TOO HIGH / SIGNAL TOO LOW

See SIGNAL TOO HIGH / SIGNAL TOO LOW

See SIGNAL TOO HIGH / SIGNAL TOO LOW

See SIGNAL TOO HIGH / SIGNAL TOO LOW

See SIGNAL TOO HIGH

See SIGNAL TOO HIGH

See SIGNAL TOO HIGH

See SIGNAL TOO LOW

SIGNAL TOO LOW (2006-2007)

See SIGNAL TOO LOW (2006)

  1. Start the engine. Check whether the fault is permanent or intermittent by reading off the signal from the mass air flow (MAF) sensor. Check that the signal is between 0.5 - 4.5 V. The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S19385118922012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the mass air flow (MAF) sensor. Check that the signal is between 0.5 - 4.5 V.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S03730740842012042500000)

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.

  1. Start the engine. Check whether the fault is permanent or intermittent by reading off the signal from the mass air flow (MAF) sensor. Check that the signal is between 0.5 - 4.5 V. The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S24678096142012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the mass air flow (MAF) sensor. Check that the signal is between 0.5 - 4.5 V.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S24605424582012042500000)

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.

  1. Start the engine. Check whether the fault is permanent or intermittent by reading off the signal from the mass air flow (MAF) sensor. Check that the signal is between 0.5 - 4.5 V. The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S12541575122012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the mass air flow (MAF) sensor. Check that the signal is between 0.5 - 4.5 V.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S02559972312012042500000)

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.

  1. Start the engine. Check whether the fault is permanent or intermittent by reading off the signal from the mass air flow (MAF) sensor. Check that the signal is between 0.5 - 4.5 V. The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S12077664972012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the mass air flow (MAF) sensor. Check that the signal is between 0.5 - 4.5 V.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S03800225042012042500000)

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.

  1. Start the engine. Check whether the fault is permanent or intermittent by reading off the signal from the mass air flow (MAF) sensor. Check that the signal is between 0.5 - 4.5 V. The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE CONNECTOR»(ref-466646-S01263191612012042500000)

Check the connector and terminals for the mass air flow (MAF) sensor. Check for contact resistance. Check for oxidation.

Remedy as necessary.

Other information

  1. see «MASS AIR FLOW (MAF) SENSOR»(ref-466648-S27926788382012042500000)
  2. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «CHECKING THE INTAKE SYSTEM»(ref-466646-S30940256152012042500000)

Check the intake system for leaks and damage.

Check the intake system for blockages (e. g. contaminants in the throttle).

Remedy as necessary.

Other information

  1. see «AIR LEAKS IN THE INTAKE SYSTEM, CHECKING»(ref-479169-S42610968362012061200000)
  2. see «MASS AIR FLOW (MAF) SENSOR»(ref-466648-S27926788382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S33802128522012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the mass air flow (MAF) sensor. Check that the signal is between 0.5 - 4.5 V.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S15672784672012042500000)

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.

SIGNAL TOO HIGH (2005-2007)

See SIGNAL TOO HIGH (2005-2007)

SIGNAL TOO HIGH (2008-2010)

See SIGNAL TOO HIGH (2008-2010)

SIGNAL TOO LOW (2005-2007)

See SIGNAL TOO LOW (2005-2007)

SIGNAL TOO LOW (2008-2010)

See SIGNAL TOO LOW (2008-2010)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, reinstall components etc.
  3. Ignition on. Read off the intake air temperature (IAT).

Is the temperature within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S31370553832012042500000)

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.

See SIGNAL TOO HIGH

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, reinstall components etc.
  3. Ignition on. Read off the intake air temperature (IAT).

Is the temperature within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S14510757592012042500000)

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.

See SIGNAL TOO LOW

HINT: The intake air temperature (IAT) sensor is integrated in the boost pressure sensor.

  1. Check the boost pressure sensor connector and terminals. Check for contact resistance and oxidation. If the diagnostic trouble code (DTC) for this fault returns after erasing diagnostic trouble codes (DTCs) and test driving, trying using a new boost pressure sensor. Remedy as necessary. Other information see «TEMPERATURE AND MANIFOLD ABSOLUTE PRESSURE SENSOR (MAPT)»(ref-466594-S34563894352012042500000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000) .
  1. Continue Refer to «VERIFICATION»(ref-466646-S14426379602012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, reinstall components etc.
  3. Ignition on. Read off the intake air temperature (IAT).

Is the temperature within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S19369727612012042500000)

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.

See FAULTY SIGNAL

HINT: The intake air temperature (IAT) sensor is integrated in the boost pressure sensor.

  1. Check the boost pressure sensor connector and terminals. Check for contact resistance and oxidation. If the diagnostic trouble code (DTC) for this fault returns after erasing diagnostic trouble codes (DTCs) and test driving, trying using a new boost pressure sensor. Remedy as necessary. Other information see «TEMPERATURE AND MANIFOLD ABSOLUTE PRESSURE SENSOR (MAPT)»(ref-466594-S34563894352012042500000) (B5254T3; 2005-2007), or «TEMPERATURE AND MANIFOLD ABSOLUTE PRESSURE SENSOR (MAPT)»(ref-466594-S37555462532012042500000) (B5254T7; 2008-2012) see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000) .
  1. Continue Refer to «VERIFICATION»(ref-466646-S12989588082012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, reinstall components etc.
  3. Ignition on. Read off the intake air temperature (IAT).

Is the temperature within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S36521458982012042500000)

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.

See SIGNAL TOO HIGH / SIGNAL TOO LOW

See SIGNAL TOO HIGH / SIGNAL TOO LOW

Check whether the fault is permanent or intermittent by reading the signals from the fuel, outside and engine temperature sensors.

Note. In order for the correct values to be shown, reading of the temperatures must take place at the moment of start.

  1. Start the engine.

Check that the intake temperature is reasonable. The temperature must correspond to the ambient temperature.

The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.

HINT: Remove the air temperature sensor, but let the connector remain connected. Let the hood remain open, the sensor should then indicate the same temperature as the outdoor temperature.

  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S17308143762012042500000)

Scheme 32

Scheme 32: CHECKING THE COMPONENT AND WIRING
Scheme 32: CHECKING THE COMPONENT AND WIRING

Scheme 33

Scheme 33
Scheme 33
  1. Ignition off.
  2. Unplug the air temperature sensor connectors.
  3. Check the connectors. Check for loose connections. Check for contact resistance. Check for oxidation. Check the resistance of the sensor between #1 and #2 (to the sensor). Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000) see «COMPONENT SPECIFICATIONS»(ref-466592-S02390340522012042500000) see «TEMPERATURE AND MANIFOLD ABSOLUTE PRESSURE SENSOR (MAPT)»(ref-466594-S34563894352012042500000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S11315461112012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, reinstall components etc.
  3. Ignition on. Read off the air temperature sensor signal. Check that the signal is plausible, compare with the external temperature.

Is the value OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S06283591892012042500000)

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.

See FAULT-TRACING

See FAULT-TRACING

See FAULT-TRACING

No fault-tracing has been developed for this diagnostic trouble code (DTC). The diagnostic trouble code (DTC) for this fault is first stored in the Central electronic module (CEM), then in the Engine control module (ECM). This diagnostic trouble code (DTC) can not be erased before the diagnostic trouble codes (DTC) in the central electronic module (CEM) has been remedied and erased.

Therefore, first read off diagnostic trouble codes in Central electronic module (CEM), perform troubleshooting and perform actions as needed. This diagnostic trouble code (DTC) can then be erased.

  1. Ignition on. Check whether the fault is permanent or intermittent by reading off the signal from the manifold absolute pressure (MAP) sensor. Check that the signal is within its permitted range. HINT: The normal value (atmospheric pressure at sea level) is approximately 3.6 V at ignition on (open throttle). The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S24416854202012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the manifold absolute pressure (MAP) sensor. Check that the signal is within its permitted range. HINT: The normal value (atmospheric pressure at sea level) is approximately 3.6 V at ignition on (open throttle).

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S09507216342012042500000)

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.

  1. Ignition on. Check whether the fault is permanent or intermittent by reading off the signal from the manifold absolute pressure (MAP) sensor. Check that the signal is within its permitted range. HINT: The normal value (atmospheric pressure at sea level) is approximately 3.6 V at ignition on (open throttle). The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S34097101382012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the manifold absolute pressure (MAP) sensor. Check that the signal is within its permitted range. HINT: The normal value (atmospheric pressure at sea level) is approximately 3.6 V at ignition on (open throttle).

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S27793133082012042500000)

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.

  1. Ignition on. Check whether the fault is permanent or intermittent by reading off the signal from the manifold absolute pressure (MAP) sensor. Check that the signal is within its permitted range. HINT: The normal value (atmospheric pressure at sea level) is approximately 3.6 V at ignition on (open throttle). The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S22883257842012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the manifold absolute pressure (MAP) sensor. Check that the signal is within its permitted range. HINT: The normal value (atmospheric pressure at sea level) is approximately 3.6 V at ignition on (open throttle).

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S04731407542012042500000)

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.

  1. Ignition on. Check whether the fault is permanent or intermittent by reading off the signal from the manifold absolute pressure (MAP) sensor. Check that the signal is within its permitted range. HINT: The normal value (atmospheric pressure at sea level) is approximately 3.6 V at ignition on (open throttle). The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S04563485952012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the manifold absolute pressure (MAP) sensor. Check that the signal is within its permitted range. HINT: The normal value (atmospheric pressure at sea level) is approximately 3.6 V at ignition on (open throttle).

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S04258107792012042500000)

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.

CHECKING THE CONNECTORS AND HOSE CONNECTOR

Check the hose connectors on the intake manifold for damage and leakage.

Check the connector and terminals on the pressure sensor. Check for contact resistance. Check for oxidation.

Remedy as necessary.

Other information

  1. see «MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR»(ref-466594-S21304092802012042500000)
  2. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S10121142602012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the manifold absolute pressure (MAP) sensor. Check that the signal is within its permitted range. HINT: The normal value (atmospheric pressure at sea level) is approximately 3.6 V at ignition on (open throttle).

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S04074199422012042500000)

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.

See SIGNAL TOO HIGH (2005-2007)

See SIGNAL TOO HIGH (2008-2010)

See SIGNAL TOO LOW (2005-2007)

See SIGNAL TOO LOW (2008-2010)

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Activate reading off the position of the throttle. Check that both sensors indicate values within the permitted range at different deployments.

Are these values within their permitted ranges?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S16109327382012042500000)

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.

CHECKING COMPONENTS AND CONNECTIONS

  1. Ignition on
  2. Activate reading off the position of the throttle
  3. Check that both sensors indicate give values within the permitted range for different deployments
  4. Ignition off. Check the engine control module (ECM) and the throttle unit connector. Check for contact resistance. Check for oxidation. Check if the throttle unit is blocked. Press the throttle disc to check for jamming. Clean the throttle unit if necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000) see «THROTTLE BODY»(ref-466651-S01198376532012042500000) see «THROTTLE BODY, CLEANING»(ref-479168-S41077336502012061200000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S14717299992012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Activate reading off the position of the throttle. Check that both sensors indicate values within the permitted range at different deployments.

Are these values within their permitted ranges?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S05892117022012042500000)

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.

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the engine coolant temperature (ECT) sensor. Check that the signal is within its permitted range.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S41645147052012042500000)

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.

  1. Ignition on. Check whether the fault is permanent or intermittent by reading off the signal from the engine coolant temperature (ECT) sensor. Check that the signal is within its permitted range. The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S19631594362012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the engine coolant temperature (ECT) sensor. Check that the signal is within its permitted range.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S17741611422012042500000)

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.

  1. Ignition on. Check whether the fault is permanent or intermittent by reading off the signal from the engine coolant temperature (ECT) sensor. Check that the signal is within its permitted range. The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S28128553682012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the engine coolant temperature (ECT) sensor. Check that the signal is within its permitted range.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S07594591642012042500000)

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.

  1. Ignition on. Check whether the fault is permanent or intermittent by reading off the signal from the engine coolant temperature (ECT) sensor. Check that the signal is within its permitted range. The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
  1. Continue Refer to «CHECKING THE COMPONENT AND WIRING»(ref-466646-S37887506772012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the engine coolant temperature (ECT) sensor. Check that the signal is within its permitted range.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S24221419152012042500000)

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.

Check the connector and terminals on the engine coolant temperature (ECT) sensor. Check for contact resistance. Check for oxidation.

Remedy as necessary.

Other information

  1. see «ENGINE COOLANT TEMPERATURE SENSOR (ECT)»(ref-466594-S14102833002012042500000)
  2. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S24755947742012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

Note. Some diagnostics for the engine coolant temperature (ECT) sensor are only performed under certain specific temperature conditions. This verification will not necessarily cover all types of detectable fault.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the engine coolant temperature (ECT) sensor. Check that the signal is within its permitted range.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S37353964502012042500000)

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.

In case of this defect, troubleshooting is not followed by verification.

The information can be displayed again or the fault-tracing for this fault can be interrupted.

SIGNAL MISSING

See SIGNAL MISSING

In case of this defect, troubleshooting is not followed by verification.

The information can be displayed again or the fault-tracing for this fault can be interrupted.

See SIGNAL TOO HIGH

In case of this defect, troubleshooting is not followed by verification.

The information can be displayed again or the fault-tracing for this fault can be interrupted.

See SIGNAL TOO LOW

Check the connector and terminals on the engine coolant temperature (ECT) sensor. Check for contact resistance. Check for oxidation.

Remedy as necessary.

Other information

  1. see «ENGINE COOLANT TEMPERATURE SENSOR (ECT)»(ref-466594-S14102833002012042500000)
  2. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S01970297712012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

Note. Some diagnostics for the engine coolant temperature (ECT) sensor are only performed under certain specific temperature conditions. This verification will not necessarily cover all types of detectable fault.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Ignition on. Read off the signal from the engine coolant temperature (ECT) sensor. Check that the signal is within its permitted range.

Is the signal within its permitted range?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S39164158542012042500000)

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.

REPLACING THE THERMOSTAT

Note. This diagnostic trouble code (DTC) is stored if the engine coolant temperature (ECT) sensor freezes. This may happen if the coolant level is low or there is too little glycol in the coolant. Check the engine coolant level and its freezing point. Remedy as necessary.

The engine control module (ECM) has registered that the actual temperature increase has deviated from the calculated temperature increase. This deviation is due to a damaged thermostat.

Other information

  1. see «ENGINE COOLANT TEMPERATURE SENSOR (ECT)»(ref-466594-S14102833002012042500000)
  2. see «THERMOSTAT»(ref-466652-S40777500182012042500000)
  1. Continue Refer to «INFORMATION»(ref-466646-S33382937582012042500000)

In case of this defect, troubleshooting is not followed by verification.

The information can be displayed again or the fault-tracing for this fault can be interrupted.

  1. The ignition must be on to perform the diagnostic. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected".
  1. Continue Refer to «CHECKING COMPONENTS»(ref-466646-S19217312662012042500000)

CHECKING COMPONENTS

CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the connector for the front heated oxygen sensor (HO2S). Check for contact resistance. Check for oxidation.

Try a new heated oxygen sensor (HO2S) if the above fault-tracing does not remedy the fault.

Remedy as necessary.

Other information

  1. see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000)
  2. see «OXYGEN SENSOR (CATALYST MONITOR SENSOR)»(ref-466651-S32701656862012042500000)
  3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

Scheme 34

Scheme 34
Scheme 34
  1. Continue Refer to «VERIFICATION»(ref-466646-S28730333862012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Start the engine to perform the diagnostic. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".

Is the fault status "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S35644513282012042500000)

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.

  1. The ignition must be on to perform the diagnostic. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected".
  1. Continue Refer to «CHECKING COMPONENTS»(ref-466646-S04892823972012042500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the connector for the front heated oxygen sensor (HO2S). Check for contact resistance. Check for oxidation.

Try a new heated oxygen sensor (HO2S) if the above fault-tracing does not remedy the fault.

Remedy as necessary.

Other information

  1. see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000)
  2. see «OXYGEN SENSOR (CATALYST MONITOR SENSOR)»(ref-466651-S32701656862012042500000)
  3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S25780402942012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Start the engine to perform the diagnostic. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".

Is the fault status "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S06831759812012042500000)

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.

CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the exhaust system for air leakage.

Try a new heated oxygen sensor (HO2S) if the above fault-tracing does not remedy the fault.

Remedy as necessary.

Other information

  1. see «AIR LEAKAGE EXHAUST SYSTEM, CHECK»(ref-479169-S27670670192012061200000)
  2. see «OXYGEN SENSOR (CATALYST MONITOR SENSOR)»(ref-466651-S32701656862012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S14550991962012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Test drive the car and perform a TRIP schedule, see: «VERIFYING REPAIRS»(ref-479169-S35307607582012061200000)
  2. Connect VCT2000 to the data link connector (DLC) without switching off the engine. NOTE: If the engine is switched off, the stored fault status will be erased and the test drive will have to be repeated. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".

Is the status of the fault "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S00609500552012042500000)

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.

  1. The ignition must be on to perform the diagnostic. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected".
  1. Continue Refer to «CHECKING THE COMPONENTS AND WIRING»(ref-466646-S29345766412012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Start the engine to perform the diagnostic. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".

Is the fault status "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S04892667592012042500000)

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.

  1. The ignition must be on to perform the diagnostic. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected".
  1. Continue Refer to «CHECKING THE COMPONENTS AND WIRING»(ref-466646-S18027042862012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Start the engine to perform the diagnostic. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".

Is the fault status "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S20162847782012042500000)

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.

  1. The ignition must be on to perform the diagnostic. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected".
  1. Continue Refer to «CHECKING FUSES»(ref-466646-S00994151212012042500000)

CHECKING FUSES

All heated oxygen sensors are supplied with voltage with the same lead. If the lead is damaged, e. g., fuse on the lead, then diagnostic code for heating for all heated oxygen sensors will be stored.

Therefore, check first if diagnostic trouble codes for heating are also stored for other heated oxygen sensors.

HINT: Brake vacuum pump is supplied with voltage via the same lead as the heated oxygen sensors. A damaged brake vacuum contact can lead to the pump running continuously and in the long-term be overheated and damaged. In turn, this leads to damaged fuse.

HINT: Therefore, check the brake vacuum switch and pump before any continued troubleshooting is done on the heated oxygen sensors.

  1. Continue Refer to «CHECKING THE COMPONENTS AND WIRING»(ref-466646-S32794428782012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Start the engine to perform the diagnostic. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".

Is the fault status "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S36571005692012042500000)

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.

  1. The ignition must be on to perform the diagnostic. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected".
  1. Continue Refer to «CHECKING FUSES»(ref-466646-S05037188032012042500000)

All heated oxygen sensors are supplied with voltage with the same lead. If the lead is damaged, e. g., fuse on the lead, then diagnostic code for heating for all heated oxygen sensors will be stored.

Therefore, check first if diagnostic trouble codes for heating are also stored for other heated oxygen sensors.

HINT: Brake vacuum pump is supplied with voltage via the same lead as the heated oxygen sensors. A damaged brake vacuum contact can lead to the pump running continuously and in the long-term be overheated and damaged. In turn, this leads to damaged fuse.

HINT: Therefore, check the brake vacuum switch and pump before any continued troubleshooting is done on the heated oxygen sensors.

  1. Continue Refer to «CHECKING THE COMPONENTS AND WIRING»(ref-466646-S08009649902012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Start the engine to perform the diagnostic. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".

Is the fault status "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S40178205372012042500000)

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.

Note. When reading off the diagnostic trouble code (DTC) status, other stored diagnostic trouble codes (DTCs) and their status will also be listed.

  1. The ignition must be on to perform the diagnostic. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected".
  1. Continue Refer to «CHECKING THE COMPONENTS AND WIRING»(ref-466646-S23891118742012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Start the engine to perform the diagnostic. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".

Is the fault status "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S15653738802012042500000)

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.

Note. When reading off the diagnostic trouble code (DTC) status, other stored diagnostic trouble codes (DTCs) and their status will also be listed.

  1. The ignition must be on to perform the diagnostic. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected".
  1. Continue Refer to «CHECKING THE COMPONENTS AND WIRING»(ref-466646-S14954071152012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Start the engine to perform the diagnostic. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".

Is the fault status "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S29436412132012042500000)

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.

Note. When reading off the diagnostic trouble code (DTC) status, other stored diagnostic trouble codes (DTCs) and their status will also be listed.

  1. The ignition must be on to perform the diagnostic. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected".
  1. Continue Refer to «CHECKING THE COMPONENTS AND WIRING»(ref-466646-S06425515222012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Start the engine to perform the diagnostic. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".

Is the fault status "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S02923626302012042500000)

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.

Note. When reading off the diagnostic trouble code (DTC) status, other stored diagnostic trouble codes (DTCs) and their status will also be listed.

  1. The ignition must be on to perform the diagnostic. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected".
  1. Continue Refer to «CHECKING THE COMPONENTS AND WIRING»(ref-466646-S34450846192012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Start the engine to perform the diagnostic. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".

Is the fault status "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S07145233682012042500000)

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.

This diagnostic trouble code can only be stored during lambda regulation quick tests. The test is normally run as verification after faults have been rectified. If the diagnostic trouble code is stored during the test, this means that faults remain to be remedied that can cause problems with lambda regulation. Continue with/return to manual navigation for fault tracing under the diagnostic trouble code related to lambda regulation.

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

See FAULT-TRACING INFORMATION

Check the exhaust system for air leakage.

Check for too low fuel pressure.

HINT: If the above fault-tracing does not remedy the fault, try replacing the heated oxygen sensor (HO2S), as the diagnostic trouble code (DTC) can also be stored by a damaged heated oxygen sensor (HO2S).

Remedy as necessary.

Other information

  1. see «AIR LEAKAGE EXHAUST SYSTEM, CHECK»(ref-479169-S27670670192012061200000)
  2. see «FUEL SYSTEM PRESSURE, CHECKING»(ref-466653-S05384690992012042500000)
  3. see «OXYGEN SENSOR (CATALYST MONITOR SENSOR)»(ref-466651-S03920303172012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S27065113362012042500000)

Read out and note the adaptation value for the vehicle.

Note. Do not erase diagnostic trouble codes (DTCs) as this also resets the adaptation values

Test drive the car and perform a TRIP schedule.

see VERIFYING REPAIRS

Read off the fuel trim.

Check that the adaptation value has approached 1 compared with the noted value.

Check that the adaptation value is between 0.9 and 1.1.

Is the value OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S13977531512012042500000)

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.

UPPER LIMIT

See UPPER LIMIT

Check the intake system for air leakage

Check the fuel and residual pressure. Check for high fuel pressure. Check for leaking injectors.

Check the mass air flow (MAF) sensor. Read off its correction factor. The value must be between 0.8 and 1.2.

Check the engine oil visually for contaminants.

Check that the oil level is between the minimum and maximum markings on the dipstick.

Note. There must not be any air leakage when this test is carried out.

HINT: If the above fault-tracing does not remedy the fault, try replacing the heated oxygen sensor (HO2S), as the diagnostic trouble code (DTC) can also be stored by a damaged heated oxygen sensor (HO2S).

Remedy as necessary.

Other information

  1. see «AIR LEAKS IN THE INTAKE SYSTEM, CHECKING»(ref-479169-S42610968362012061200000)
  2. see «FUEL SYSTEM PRESSURE, CHECKING»(ref-466653-S05384690992012042500000)
  3. see «MASS AIR FLOW (MAF) SENSOR»(ref-466648-S11977590702012042500000)
  4. see «OXYGEN SENSOR (CATALYST MONITOR SENSOR)»(ref-466651-S03920303172012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S39520868442012042500000)

Read out and note the adaptation value for the vehicle.

Note. Do not erase diagnostic trouble codes (DTCs) as this also resets the adaptation values

Test drive the car and perform a TRIP schedule.

see VERIFYING REPAIRS

Read off the fuel trim.

Check that the adaptation value has approached 1 compared with the noted value.

Check that the adaptation value is between 0.9 and 1.1.

Is the value OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S36092967032012042500000)

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.

LOWER LIMIT

See LOWER LIMIT

CHECKING ETHANOL CONTENT

HINT: The cause of the symptom and/or diagnostic trouble code may be that the vehicle has been refuelled with incorrect fuel for that vehicle. The fuel system contains fuel with too high ethanol content.

The energy content in ethanol-diluted fuel is lower than in pure gasoline. This means that the control module compensates for the lower energy content, by increasing the injection volume, to be able to reach lambda=1 at the front heated oxygen sensor. This compensation is normally called "Front lambda control slow" or "Lambda integrator", and varies to compensate for the vehicle's status in the form of component spread, small air leaks, wear, etc. The value of this compensation in the ideal case is 1.0 for pure gasoline. Increased ethanol content of the fuel increases the compensation by approx. 0.05 per 10% ethanol dilution.

The control module is designed to handle an ethanol dilution up to 25%. In combination with other deviations from the ideal case, however, lower ethanol content may be enough to cause customer symptoms. This mainly occurs at engine start with cool engine at outdoor temperatures below 0 °C. Then the diagnostic trouble code may also be set for the engine running on too lean mixture.

Note. In a vehicle intended for gasoline, only pure gasoline shall be used. Even if engine start/operation works, other fuel-related components in the vehicle may be damaged by too high ethanol content.

  1. Measure the ethanol content of the fuel according to the instructions below. If measured ethanol content is above 25%, then ethanol dilution is the likely cause of the symptom and/or to the diagnostic trouble code being stored. If measured ethanol content is below 25%, symptoms and/or diagnostic trouble code may have been caused by earlier occurrence of incorrect fuel in the system for that vehicle. HINT: Check refuelling history by talking to customer. If nothing indicates incorrect fuel, neither now nor earlier, continue troubleshooting to check other possible causes of faults.

Other information

  1. see «MEASURING THE ETHANOL CONTENT»(ref-466591-S09065369922012042500000)
  1. Continue Refer to «CHECKING THE FUEL INJECTION SYSTEM»(ref-466646-S30180052852012042500000)

CHECKING THE FUEL INJECTION SYSTEM

Check the intake system for air leakage.

HINT: Air leakage in the intake system can occur through the canister purge (CP) valve, the secondary air solenoid valve and power brake booster.

Start the engine. Allow the engine to run at idle speed for 10 minutes.

Check the mass air flow (MAF) sensor. Read off its correction factor. The value must be between 0.8 and 1.2.

Note. There must not be any air leakage when this test is carried out.

HINT: If the above fault-tracing does not remedy the fault, try replacing the heated oxygen sensor (HO2S), as the diagnostic trouble code (DTC) can also be stored by a damaged heated oxygen sensor (HO2S).

Remedy as necessary.

Other information

  1. see «AIR LEAKS IN THE INTAKE SYSTEM, CHECKING»(ref-479169-S42610968362012061200000)
  2. see «MASS AIR FLOW (MAF) SENSOR»(ref-466648-S11977590702012042500000)
  3. see «OXYGEN SENSOR (CATALYST MONITOR SENSOR)»(ref-466651-S03920303172012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S01368710472012042500000)

Read out and note the adaptation value.

Note. Do not erase diagnostic trouble codes (DTCs) as this also resets the adaptation values

Test drive the car and perform a TRIP schedule.

see VERIFYING REPAIRS

Read off the fuel trim.

Check that the adaptation value is approaching 0 compared with the noted value. Check that the adaptation value is within the range 0 ±10 %.

Is the value OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S21381175362012042500000)

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.

See UPPER LIMIT

Check the fuel and residual pressure for leaking injectors.

Check that the oil level is between the minimum and maximum markings on the dipstick.

Check the engine oil visually for contaminants.

Check the mass air flow (MAF) sensor. Read off its correction factor. The value must be between 0.8 and 1.2.

Note. There must not be any air leakage when this test is carried out.

HINT: If the above fault-tracing does not remedy the fault, try replacing the heated oxygen sensor (HO2S), as the diagnostic trouble code (DTC) can also be stored by a damaged heated oxygen sensor (HO2S).

Remedy as necessary.

Other information

  1. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) (B5254T3; 2005), or «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000) (B5254T3; 2006-2007)
  2. see «FUEL SYSTEM PRESSURE, CHECKING»(ref-466653-S05384690992012042500000)
  3. see «MASS AIR FLOW (MAF) SENSOR»(ref-466648-S11977590702012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S14811678922012042500000)

Read out and note the adaptation value.

Note. Do not erase diagnostic trouble codes (DTCs) as this also resets the adaptation values

Test drive the car and perform a TRIP schedule.

see VERIFYING REPAIRS

Read off the fuel trim.

Check that the adaptation value is approaching 0 compared with the noted value. Check that the adaptation value is within the range 0 ±10 %.

Is the value OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S15499673202012042500000)

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.

See LOWER LIMIT

See FAULT-TRACING INFORMATION

Check power cable terminal #1 in the rear heated oxygen sensor (HO2S) connector. Check for contact resistance. Check for oxidation.

Check ground lead terminal #2 in the rear heated oxygen sensor (HO2S) connector. Check for contact resistance. Check for oxidation.

Try a new heated oxygen sensor (HO2S) if the above fault-tracing does not remedy the fault.

Remedy as necessary.

Other information

  1. see «OXYGEN SENSOR (CATALYST MONITOR SENSOR)»(ref-466651-S03920303172012042500000)
  2. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466646-S22852023382012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reconnect the connectors, reinstall components etc.
  3. Start the engine
  4. Allow the engine to idle for at least 5 minutes. Read off the diagnostic status and fault status for the diagnostic trouble code (DTC) by selecting the relevant diagnostic trouble code (DTC) from the list. Check the fault status for the diagnostic trouble code (DTC) when the diagnostic is "Complete". If the function is correct, the fault status must be "No fault found" when the diagnostic is complete.

Is the function OK?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S37160854472012042500000)

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.

See FAULTY SIGNAL

  1. Start the engine to perform the diagnostic. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected".
  1. Continue Refer to «CHECKING THE COMPONENTS AND WIRING»(ref-466646-S10791639652012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Start the engine to perform the diagnostic. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".

Is the fault status "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S14943193132012042500000)

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.

  1. Start the engine to perform the diagnostic. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected".
  1. Continue Refer to «CHECKING THE COMPONENTS AND WIRING»(ref-466646-S00300929552012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Start the engine to perform the diagnostic. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found".

Is the fault status "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S24429499112012042500000)

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.

  1. Start the engine to perform the diagnostic. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected". see scheme 517: Identifying VCT2000 see scheme 518: Identifying Rear Heated Oxygen Sensor
  1. Continue Refer to «CHECKING THE COMPONENTS AND WIRING»(ref-466646-S37279301472012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Start the engine to perform the diagnostic. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found". see scheme 524: Identifying VCT2000

Is the fault status "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S24677393912012042500000)

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.

  1. Start the engine to perform the diagnostic. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". The fault is permanent if the fault status is "Fault found". The fault is intermittent if the fault status is "No fault detected". see scheme 526: Identifying VCT2000 see scheme 527: Identifying Rear Heated Oxygen Sensor
  1. Continue Refer to «CHECKING THE COMPONENTS AND WIRING»(ref-466646-S33298619962012042500000)

HINT: After carrying out the repair, check that the fault has been remedied.

  1. Ignition off
  2. Reinstall the connectors, components etc.
  3. Start the engine to perform the diagnostic. Read off the diagnostic status and the fault status for the diagnostic trouble code (DTC). Check that the diagnostic is "Completed" and that the fault status is "No fault detected". The function is faulty if the fault status is "Fault found". see scheme 533: Identifying VCT2000

Is the fault status "No fault detected"?

  1. YES VERIFIED: Troubleshooting has been completed.
  2. NO Refer to «INFORMATION»(ref-466646-S03184607312012042500000)

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.

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