Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 5 of 14 (Convertible): Other Volvo C70 I

Checking components, intake system

HINT: This diagnostic trouble code can be caused by a damaged mass air flow sensor.

Check that lambda adaptations are within the specified normal values.

Incorrect lambda adaptations can indicate a faulty mass air flow (MAF) sensor.

HINT: Use the adaptations for the mass air flow (MAF) sensor and leak flow (parameter read out) to determine how much the system has adapted.

An adaptation on one or both parameters that is less than approximately 0.85 indicates blocked crankcase ventilation and/or a dirty electronic throttle module (ETM).

Adaptations greater than approximately 1.15 indicate a (smaller) air leak somewhere in the intake system.

Note. Even extremely small air leaks can cause this diagnostic trouble code (DTC) to be stored.

Check that the intake air temperature (IAT) sensor and boost pressure sensor are correctly installed. Check for air leakage around the components.

Check the crankcase ventilation for blockage. In particular check the positive crankcase ventilation (PCV) valve on turbocharged engines.

HINT: Indications of a blocked positive crankcase ventilation (PCV) valve include contamination or oil on components in the intake system.

Remedy as necessary.

Other information

1. See «Information about combined diagnostic trouble codes (DTCs)»(ref-404036-S28837778002011061000000)
2. See «Air leakage in the intake system, checking»(ref-404039-S19460685632011061000000)
3. See «Throttle body (TB), cleaning»(ref-438325-S23458107292011120100000)
4. See «Mass air flow (MAF) sensor, replacing»(ref-403955-S20239705332011061000000)

Scheme 308

1. Continue Refer to «Verification»(ref-404040-S08849333652011061000000)

Verification

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

Scheme 309

Scheme 310

Scheme 311

1. Ignition off.
2. Reinstall the connectors, components etc.
3. Ignition on.
4. Read off and make a note of the adaptation value.
5. Start the engine. Increase the engine speed (RPM) a couple of times.
6. Read off the adaptation value and check that the adaptation value approaches 1.

Does the adaptation value approach 1?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S28818960552011061000000)

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.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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

1. Ignition off.
2. Reconnect connectors, reinstall components.
3. Ignition on.
4. Read off the manifold absolute pressure (MAP) sensor signal.
5. Start the engine. Check that the signal varies (sinks) during acceleration. Check that the signal is within its permitted range. The manifold absolute pressure (MAP) sensor voltage is compared to the table value: «Air pressure sensor intake manifold (MAP)»(ref-403971-S24151482382011061000000) Check that the signal is OK.

Is the signal OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S42507944832011061000000)

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.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Checking connector

1. Ignition off.
2. Check manifold absolute pressure (MAP) sensor connector for contact resistance and oxidation according to «Short-circuit to ground, permanent faults»(ref-403956-S06142553522011061000000) . Remedy as necessary. Other information: For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000) To localize the manifold absolute pressure (MAP) sensor, see «Location of components»(ref-403970-S02481495422011061000000) .

1. Continue Refer to «Checking manifold absolute pressure (MAP) sensor signal»(ref-404040-S17022553642011061000000)

Checking manifold absolute pressure (MAP) sensor signal

1. Ignition off.
2. Reinstall components, reconnect connectors etc.
3. Ignition on.
4. Read off the manifold absolute pressure (MAP) sensor signal. Check that the signal is within its permitted range. The manifold absolute pressure (MAP) sensor voltage is compared to the table value: «Air pressure sensor intake manifold (MAP)»(ref-403971-S24151482382011061000000) . If signal is now OK this indicates that the fault was caused by poor contact in the connector. Other information: For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000) To localize the manifold absolute pressure (MAP) sensor, see «Location of components»(ref-403970-S02481495422011061000000) .

Is the signal OK?

1. YES Refer to «Verification»(ref-404040-S40930370202011061000000)
2. NO Refer to «Checking wiring and components»(ref-404040-S27077381902011061000000)

Checking cables and connectors

Check reference voltage cable between control module connector #A58 (#A60) and manifold absolute pressure (MAP) sensor connector terminal 3 for an intermittent open-circuit according to Open-circuit, intermittent faults or an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

HINT: With the ignition on and manifold absolute pressure (MAP) sensor connector disconnected the voltage between terminal 3 and ground terminal should be approximately 5 V.

Check signal cable between control module connector #A23 (#A23) and manifold absolute pressure (MAP) sensor connector terminal 1 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

HINT: With the ignition on and manifold absolute pressure (MAP) sensor connector disconnected the voltage between terminal 1 and ground terminal should be approximately 5 V.

Other information

1. To connect the breakout box, see «Connecting the breakout box»(ref-403956-S00897666572011061000000)
2. To access/replace the control module, see «Replacing the engine control module (ECM)»(ref-404033-S34042663912011061000000)
3. For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000)
4. To localize the manifold absolute pressure (MAP) sensor, see «Location of components»(ref-403970-S02481495422011061000000) .

1. Continue Refer to «Information»(ref-404040-S36005696642011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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

1. Ignition off.
2. Reconnect connectors, reinstall components.
3. Ignition on.
4. Read off the manifold absolute pressure (MAP) sensor signal.
5. Start the engine. Check that the signal varies (sinks) during acceleration. Check that the signal is within its permitted range. The manifold absolute pressure (MAP) sensor voltage is compared to the table value: «Air pressure sensor intake manifold (MAP)»(ref-403971-S24151482382011061000000) Check that the signal is OK.

Is the signal OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S24406300742011061000000)

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 reference voltage cable between control module connector #A58 (#A60) and manifold absolute pressure (MAP) sensor connector terminal 3 for an intermittent open-circuit according to Open-circuit, intermittent faults or an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

HINT: With the ignition on and manifold absolute pressure (MAP) sensor connector disconnected the voltage between terminal 3 and ground terminal should be approximately 5 V.

Check signal cable between control module connector #A23 (#A23) and manifold absolute pressure (MAP) sensor connector terminal 1 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

HINT: With the ignition on and manifold absolute pressure (MAP) sensor connector disconnected the voltage between terminal 1 and ground terminal should be approximately 5 V.

Other information

1. To connect the breakout box, see «Connecting the breakout box»(ref-403956-S00897666572011061000000)
2. To access/replace the control module, see «Replacing the engine control module (ECM)»(ref-404033-S34042663912011061000000)
3. For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000)
4. To localize the manifold absolute pressure (MAP) sensor, see «Location of components»(ref-403970-S02481495422011061000000) .

1. Continue Refer to «Information»(ref-404040-S10330999502011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Checking the connector

1. Ignition off
2. Check the pressure sensor connector. Check for contact resistance and oxidation. See «Contact resistance and oxidation»(ref-403956-S32156020042011061000000) . Ignition on Read off the pressure in the pressure sensor Start the engine. Depress and release the accelerator pedal (AP). Check that the voltage of the pressure sensor changes.

Does the pressure change by more than 0.1 Volt?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking the component»(ref-404040-S33731567472011061000000)

Checking the component

Check that the hose between the pressure gauge and intake pipe. Check for damage and leakage.

Remedy as necessary.

Other information

1. For information about signals / resistance values, see «Signal specification»(ref-403973-S19941283772011061000000)
2. To access or replace the pressure sensor, see «Location of components»(ref-403970-S02481495422011061000000) .

1. Continue Refer to «Information»(ref-404040-S19798881242011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

1. Ignition off.
2. Check mass air flow (MAF) sensor and pressure sensor connectors for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-403956-S32156020042011061000000) .

1. Continue Refer to «Check the values for the mass air flow (MAF) and pressure sensors»(ref-404040-S05230482572011061000000)

Check the values for the mass air flow (MAF) and pressure sensors

1. Start engine and run to normal operating temperature.
2. Switch off all large power consuming components, for example the air conditioning (A/C) compressor, defroster and seat heaters.
3. Read off the mass air flow (MAF) and pressure sensors values.
4. Check that the mass air flow (MAF) and pressure sensor values are within their various ranges at different engine speeds (RPM) according to: Mass air flow (MAF) sensor values, see «Mass air flow (MAF) sensor»(ref-403971-S06501795622011061000000) . Manifold absolute pressure (MAP) sensor values, see «Air pressure sensor intake manifold (MAP)»(ref-403971-S24151482382011061000000) .

Are these values OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking component»(ref-404040-S13622103972011061000000)

Checking component

Check for air leakage in the intake system. In particular check the hose between mass air flow (MAF) sensor and throttle body (TB) for leakage and damage according to Check for air leaks in the intake system .

Check that the hose between the manifold absolute pressure (MAP) sensor and manifold is airtight and is not trapped.

Remedy as necessary.

Other information

1. To localize the manifold absolute pressure (MAP) sensor and manifold, see «Location of components»(ref-403970-S02481495422011061000000) .
2. For information about the signals/resistance values, see «Signal specification»(ref-403973-S19941283772011061000000) .
3. To access/replace the Mass Air Flow (MAF) sensor, see «Replacing the mass air flow (MAF) sensor»(ref-438318-S20858943492011120100000) .

1. Continue Refer to «Information»(ref-404040-S25611637962011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

1. Ignition off.
2. Check mass air flow (MAF) sensor and pressure sensor connectors for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-403956-S32156020042011061000000) .

1. Continue Refer to «Check the values for the mass air flow (MAF) and pressure sensors»(ref-404040-S07098305832011061000000)

1. Start engine and run to normal operating temperature.
2. Switch off all large power consuming components, for example the air conditioning (A/C) compressor, defroster and seat heaters.
3. Read off the mass air flow (MAF) and pressure sensors values.
4. Check that the mass air flow (MAF) and pressure sensor values are within their various ranges at different engine speeds (RPM) according to: Mass air flow (MAF) sensor, table values, see «Mass air flow (MAF) sensor»(ref-403971-S06501795622011061000000) . Manifold absolute pressure (MAP) sensor, table values, see «Air pressure sensor intake manifold (MAP)»(ref-403971-S24151482382011061000000) .

Are these values OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking component»(ref-404040-S18316283202011061000000)

Check for air leakage in the intake system. In particular check the hose between mass air flow (MAF) sensor and throttle body (TB) for leakage and damage according to Check for air leaks in the intake system .

Check that the hose between the manifold absolute pressure (MAP) sensor and manifold is airtight and is not trapped.

Remedy as necessary.

Other information

1. To localize the manifold absolute pressure (MAP) sensor and manifold, see «Location of components»(ref-403970-S02481495422011061000000) .
2. For information about the signals/resistance values, see «Signal specification»(ref-403973-S19941283772011061000000) .
3. To access/replace the Mass Air Flow (MAF) sensor, see «Replacing the mass air flow (MAF) sensor»(ref-438318-S20858943492011120100000) .

1. Continue Refer to «Information»(ref-404040-S33105128212011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Checking components and connectors

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 fault may also be caused by a defective boost pressure sensor. The boost pressure sensor may be defective if the above fault tracing and corrective action does not remedy the fault.

Remedy as necessary.

Other information

1. To access or replace the boost pressure sensor, see «Temperature and pressure sensor, replacing»(ref-438319-S03698622212011120100000)
2. See «Contents»(ref-438291-S00903409402011120100000) .

1. Continue Refer to «Verification»(ref-404040-S41397503912011061000000)

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

Scheme 312

1. Reinstall the connectors, components etc.
2. Test drive the car to reach different boost pressures
3. Read off the diagnostic status and the fault status for diagnostic trouble code (DTC) ECM-1600. NOTE: Do not switch off the engine before VCT2000 has been connected and the status of the fault has been read off. Check that the fault status is "NO FAULT FOUND" when the diagnostic status is COMPLETED. If the fault status is "FAULT FOUND" when the diagnostic status is COMPLETED there is a fault.

Is the fault status "NO FAULT FOUND"?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S02771649792011061000000)

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 boost pressure sensor connector for contact resistance and oxidation according to Contact resistance and oxidation and loose connections according to Loose connections (terminals)

Check the signal cable between control module #A23 (#A23) and boost pressure sensor terminal 3 for an intermittent open-circuit according to Open-circuit, intermittent faults and an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults

Check the ground lead between control module #A60 (#A60) and boost pressure sensor terminal 2 for an intermittent open-circuit according to Open-circuit, intermittent faults

Other information

1. To connect the breakout box / access the control module, see «Connecting the breakout box»(ref-403956-S37247582692011061000000) .
2. To access / replace the boost pressure sensor, see «Manifold absolute pressure (MAP) sensor, replacing»(ref-404035-S00760000652011061000000) .
3. For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

Scheme 313

1. Continue Refer to «Information»(ref-404040-S00297760742011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Signal too high. Intermittent fault

See Signal too high. Intermittent fault

See Signal too high. Intermittent fault

1. Ignition off
2. Check boost pressure sensor connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-403956-S41958999262011061000000) .
3. Reinstall components, reconnect connectors etc.
4. Ignition on.
5. Read off boost pressure sensor signal. Check that the signal is within its permitted range. With engine switched off voltage should be approximately 1.9 V. If signal is now OK this indicates that the fault was caused by poor contact in the connector. Other information To access/replace the boost pressure sensor, see «Manifold absolute pressure (MAP) sensor, replacing»(ref-404035-S00760000652011061000000) .

Is the signal OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking wiring and components»(ref-404040-S42947261702011061000000)

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

1. Ignition off.
2. Reconnect connectors, reinstall components
3. Ignition on.
4. Read off boost pressure sensor signal. With the ignition on voltage should be approximately 1.9 V.

Is the signal OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S41246069152011061000000)

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 off
2. Check the boost pressure sensor connector. Check for contact resistance and oxidation
3. Reinstall the components, reconnect the connectors etc.
4. Ignition on
5. Read off the boost pressure sensor signal. Check that the signal is within its permitted range. With the engine switched off, the voltage should be approximately 1.9 V. If the signal is now OK, the fault was caused by poor contact in the connector. Other information To access or replace the boost pressure sensor, see «Temperature and pressure sensor, replacing»(ref-438319-S03698622212011120100000) See «Contents»(ref-438291-S00903409402011120100000) .

Is the signal OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking components and wiring»(ref-404040-S15718367542011061000000)

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

1. Ignition off.
2. Reconnect connectors, reinstall components
3. Ignition on.
4. Read off boost pressure sensor signal. With the ignition on voltage should be approximately 1.9 V.

Is the signal OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S15040386262011061000000)

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. Permanent fault

See Signal too high. Permanent fault

See Signal too high. Permanent fault

Check signal cable between control module #A23 (#A23) and boost pressure sensor terminal 1 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults

Other information

1. Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-403956-S37247582692011061000000) .
2. To access/replace the boost pressure sensor, see «Manifold absolute pressure (MAP) sensor, replacing»(ref-404035-S00760000652011061000000) .
3. For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

1. Continue Refer to «Information»(ref-404040-S10918466992011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Signal too low. Intermittent fault

See Signal too low. Intermittent fault

See Signal too low. Intermittent fault

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

1. Ignition off.
2. Reconnect connectors, reinstall components
3. Ignition on.
4. Read off boost pressure sensor signal. With the ignition on voltage should be approximately 1.9 V.

Is the signal OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S07954524012011061000000)

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. Reconnect connectors, reinstall components
3. Ignition on.
4. Read off boost pressure sensor signal. With the ignition on voltage should be approximately 1.9 V.

Is the signal OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S30489347732011061000000)

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. Permanent fault

See Signal too low. Permanent fault

See Signal too low. Permanent fault

Checking connectors

Check boost pressure sensor connector for intermittent contact resistance, oxidation according to Contact resistance and oxidation .

Other information

1. To access/replace the boost pressure sensor, see «Manifold absolute pressure (MAP) sensor, replacing»(ref-404035-S00760000652011061000000) .
2. To access/replace the engine control module (ECM), see «Engine control module (ECM), replacing»(ref-404026-S05981562602011061000000) .
3. For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

1. Continue Refer to «Information»(ref-404040-S42850934592011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Check boost pressure sensor connector for intermittent contact resistance, oxidation according to Contact resistance and oxidation .

Other information

1. To access/replace the boost pressure sensor, see «Manifold absolute pressure (MAP) sensor, replacing»(ref-404035-S00760000652011061000000) .
2. To access/replace the engine control module (ECM), see «Engine control module (ECM), replacing»(ref-404026-S05981562602011061000000) .
3. For information about signals on 5-cyl, see «Signal specification»(ref-438318-S23639998362011120100000) .
4. For information about signals on 6-cyl, see «Signal specification»(ref-438318-S29219213252011120100000) .

1. Continue Refer to «Information»(ref-404040-S26972635262011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Faulty signal. Intermittent fault

See Faulty signal. Intermittent fault

See Faulty signal. Intermittent fault

1. Ignition off
2. Check boost pressure sensor connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-403956-S41958999262011061000000) .
3. Reinstall components, reconnect connectors etc.
4. Ignition on.
5. Read boost pressure and atmospheric pressure.
6. The difference in pressure should not be greater than 140 hPa (2.0 psi). If the difference is less than 140 hPa (2.0 psi) it means that the cause of the fault has been loose connections in the connector. Other information Normal atmospheric pressure is 1013 hPa (14.7 psi). To access/replace the boost pressure sensor, see «Manifold absolute pressure (MAP) sensor, replacing»(ref-404035-S00760000652011061000000) .

Is the difference between the pressures less than 140 hPa? (2.0 psi)

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Replacing ECM»(ref-404040-S01720585642011061000000)

Replacing ECM

If the difference between the pressures is greater than 140 hPa (2.0 psi), try replacing the boost pressure sensor according to Manifold absolute pressure (MAP) sensor, replacing .

HINT: Normal atmospheric pressure is 1013 hPa (14.7 psi). Check which of the sensors appears to display the incorrect reading.

If the fault is not in the boost pressure sensor, replace the engine control module (ECM) according to Engine control module (ECM), replacing .

Note. The atmospheric pressure sensor is built into the engine control module (ECM) and therefore cannot be replaced as a separate item.

Remedy as necessary.

Other information

1. Normal atmospheric pressure is 1013 hPa (14.7 psi).
2. For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

1. Continue Refer to «Verification»(ref-404040-S20685849462011061000000)

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 boost pressure sensor pressure and atmospheric pressure sensor pressure
5. The difference between the pressure sensors should not be greater than 140 hPa.

Is the difference between the pressure sensors less than 140 hPa?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S12876933352011061000000)

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 off.
2. Check boost pressure sensor connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-403956-S41958999262011061000000) .
3. Reinstall components, reconnect connectors etc.
4. Ignition on.
5. Read boost pressure and atmospheric pressure.
6. The difference in pressure should not be greater than 140 hPa. If the difference is less than 140 hPa it means that the cause of the fault has been loose connections in the connector. Other information To access/replace the boost pressure sensor, see «Manifold absolute pressure (MAP) sensor, replacing»(ref-404035-S00760000652011061000000) .

Is the difference between the pressures less than 140 hPa?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Replacing ECM»(ref-404040-S33880873862011061000000)

If the difference between the pressures is greater than 140 hPa, try replacing the boost pressure sensor according to Manifold absolute pressure (MAP) sensor, replacing .

HINT: Normal atmospheric pressure is 1013 hPa. Check which of the sensors appears to display the incorrect reading.

If the fault is not in the boost pressure sensor, replace the engine control module (ECM) according to Engine control module (ECM), replacing .

Note. The atmospheric pressure sensor is built into the engine control module (ECM) and therefore cannot be replaced as a separate item.

Remedy as necessary.

Other information

1. Normal atmospheric pressure is 1013 hPa.
2. For information about signals on 5-cylinder engines, see «Signal specification»(ref-438318-S23639998362011120100000) .
3. For information about signals on 6-cylinder engines, see «Signal specification»(ref-438318-S29219213252011120100000) .

1. Continue Refer to «Verification»(ref-404040-S20591973202011061000000)

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 boost pressure sensor pressure and atmospheric pressure sensor pressure
5. The difference between the pressure sensors should not be greater than 140 hPa.

Is the difference between the pressure sensors less than 140 hPa?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S37270889182011061000000)

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.

Faulty signal. Permanent fault

See Faulty signal. Permanent fault

See Faulty signal. Permanent fault

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

See Faulty signal. Intermittent fault

See Faulty signal. Intermittent fault

Checking the engine coolant temperature (ECT)

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.

1. Fault-tracing must begin with the engine cold (+20 °C) so that the engine coolant temperature (ECT) sensor can be tested over as wide a temperature range as possible
2. Switch off the climate control unit
3. Start the engine. Read off the engine coolant temperature (ECT). Check that the engine coolant temperature (ECT) is within its permitted range and corresponds with the engine warming up.

Is the temperature within its permitted range?

1. YES Refer to «Checking the thermostat»(ref-404040-S29096991852011061000000)
2. NO Refer to «Replacing the ECT sensor»(ref-404040-S24101885022011061000000)

Checking the thermostat

1. Start the engine. Run the engine until the engine coolant temperature (ECT) reaches approximately 100 °C
2. Activate the engine cooling fan (FC) with the engine running
3. Wait approximately 90 seconds and then shut-off the engine cooling fan (FC). Read off the engine coolant temperature (ECT). If it is 85 °C or lower when the fan stops, the thermostat is defective.

Is the temperature 85 °C or lower when the fan stops?

1. YES Refer to «Replacing the thermostat»(ref-404040-S32833100762011061000000)
2. NO FAULT TRACING 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.

Replacing the thermostat

Replace the thermostat. See Check/replacing thermostat .

Scheme 314

1. Continue OKAY: Troubleshooting has been completed.

Replacing the ECT sensor

Replace engine coolant temperature (ECT) sensor. See Engine temperature sensor .

1. Continue Refer to «Verification»(ref-404040-S36445438342011061000000)

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

1. Fault-tracing must begin with the engine cold (+20 °C) so that the engine coolant temperature (ECT) sensor can be tested over as wide a temperature range as possible
2. Ignition off
3. Reconnect connectors, reinstall components etc.
4. Start the engine
5. Read off the engine coolant temperature. Check that the engine coolant temperature (ECT) is within its permitted range and corresponds with the engine warming up.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S39850492442011061000000)

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. Fault-tracing must begin with the engine cold (+20 °C) so that the engine coolant temperature (ECT) sensor can be tested over as wide a temperature range as possible
2. Switch off the climate control unit
3. Start the engine. Read off the engine coolant temperature (ECT). Check that the engine coolant temperature (ECT) is within its permitted range and corresponds with the engine warming up.

Is the temperature within its permitted range?

1. YES Refer to «Checking the thermostat»(ref-404040-S26947418212011061000000)
2. NO Refer to «Replacing the ECT sensor»(ref-404040-S14805369012011061000000)

1. Start the engine. Run the engine until the engine coolant temperature (ECT) reaches approximately 100 °C
2. Activate the engine cooling fan (FC) with the engine running
3. Wait approximately 90 seconds and then shut-off the engine cooling fan (FC). Read off the engine coolant temperature (ECT). If it is 85 °C or lower when the fan stops, the thermostat is defective.

Is the temperature lower than 86 °C?

1. YES Refer to «Replacing the thermostat»(ref-404040-S27174847682011061000000)
2. NO FAULT TRACING 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.

Try a new thermostat. See Thermostat / temperature sensor, engine coolant, replacing .

1. Continue OKAY: Troubleshooting has been completed.

Replace engine coolant temperature (ECT) sensor. See Engine temperature sensor .

1. Continue Refer to «Verification»(ref-404040-S20758965172011061000000)

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

1. Fault-tracing must begin with the engine cold (+20 °C) so that the engine coolant temperature (ECT) sensor can be tested over as wide a temperature range as possible
2. Ignition off
3. Reconnect connectors, reinstall components etc.
4. Start the engine
5. Read off the engine coolant temperature. Check that the engine coolant temperature (ECT) is within its permitted range and corresponds with the engine warming up.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S14653497902011061000000)

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. Permanent fault

See Faulty signal. Permanent fault

1. Ignition off
2. Check the connector on the engine coolant temperature (ECT) sensor. Check for contact resistance and oxidation. Remedy as necessary. Other information To access or replace the engine coolant temperature (ECT) sensor, see «Engine coolant temperature (ECT) sensor, replacing»(ref-404026-S29654956492011061000000) For information about signals see «Signal specification»(ref-403973-S19941283772011061000000) See «Checking wiring and terminals»(ref-438291-S01987812252011120100000) .

1. Continue Refer to «Checking the connector»(ref-404040-S04868510192011061000000)

1. Ignition off
2. Reinstall the components, reconnect the connectors etc.
3. Ignition on
4. Read off the engine coolant temperature (ECT) sensor signal. Check that the signal is within its permitted range - compare with the value in the table: «Engine coolant temperature (ECT) sensor»(ref-403971-S05545493992011061000000) . If the temperature reading is now OK, the fault was probably caused by poor contact in the connector. Other information To access or replace the engine coolant temperature (ECT) sensor, see «Engine coolant temperature (ECT) sensor, replacing»(ref-404026-S29654956492011061000000) For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000) .

Is the temperature reading OK?

1. YES Refer to «Verification»(ref-404040-S01051388282011061000000)
2. NO Refer to «Checking the wiring and component»(ref-404040-S38477830452011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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

1. Ignition off.
2. Reconnect connectors, reinstall components.
3. Start the engine and let it idle.
4. Read off engine coolant temperature (ECT) sensor signal. Compare the engine coolant temperature (ECT) sensor signal with the table value according to: «Engine coolant temperature (ECT) sensor»(ref-403971-S05545493992011061000000) . Let the engine run at idling speed, check that the signal sinks when the engine warms up.

Is the engine coolant temperature (ECT) sensor signal OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S03963629012011061000000)

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 cable between control module #A4 (#A4) and engine coolant temperature (ECT) sensor #1 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults

Other information

1. Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-403956-S37247582692011061000000) .
2. To access the engine coolant temperature (ECT) sensor, see «Engine temperature sensor»(ref-404026-S01967580252011061000000) .
3. For resistance values, see «Component specifications»(ref-403971-S01187285952011061000000) .
4. For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

1. Continue Refer to «Information»(ref-404040-S29421337252011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Check the cable between control module #A4 (#A4) and engine coolant temperature (ECT) sensor #1 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults

Other information

1. Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-403956-S37247582692011061000000) .
2. To access the engine coolant temperature (ECT) sensor, see «Engine temperature sensor»(ref-404026-S01967580252011061000000) .
3. For information about signals, see «Signal specification»(ref-438318-S23639998362011120100000) .
4. For information about the resistance values, see «Component specifications»(ref-403972-S40713314922011061000000) .

1. Continue Refer to «Information»(ref-404040-S27652792842011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

See Signal too high. Intermittent fault

See Signal too high. Intermittent fault

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

1. Ignition off
2. Reconnect connectors, reinstall components etc.
3. Ignition on
4. Read off the engine coolant temperature (ECT) sensor.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S41597739532011061000000)

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. Reconnect connectors, reinstall components etc.
3. Ignition on
4. Read off the engine coolant temperature (ECT) sensor.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S31076252442011061000000)

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. Permanent fault

See Signal too high. Permanent fault

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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

1. Ignition off.
2. Reconnect connectors, reinstall components.
3. Start the engine and let it idle.
4. Read off engine coolant temperature (ECT) sensor signal. Compare the engine coolant temperature (ECT) sensor signal with the table value according to: «Engine coolant temperature (ECT) sensor»(ref-403971-S05545493992011061000000) . Let the engine run at idling speed, check that the signal sinks when the engine warms up.

Is the engine coolant temperature (ECT) sensor signal OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S05540359202011061000000)

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.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

See Signal too low. Intermittent fault

See Signal too low. Intermittent fault

1. Ignition off
2. Check the engine coolant temperature (ECT) sensor connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-403956-S41958999262011061000000) .
3. Reinstall components, reconnect connectors etc.
4. Ignition on.
5. Read off the engine coolant temperature (ECT) sensor. If the temperature is now within its permitted range, the fault was caused by loose connections in the connector. Other information To access the engine coolant temperature (ECT) sensor, see «Engine temperature sensor»(ref-404026-S01967580252011061000000) .

Is the temperature within its permitted range?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking wiring and components»(ref-404040-S19869326432011061000000)

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

1. Ignition off
2. Reconnect connectors, reinstall components etc.
3. Ignition on
4. Read off the engine coolant temperature (ECT) sensor.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S20885356222011061000000)

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 off
2. Check the engine coolant temperature (ECT) sensor connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-403956-S41958999262011061000000) .
3. Reinstall components, reconnect connectors etc.
4. Ignition on.
5. Read off the engine coolant temperature (ECT) sensor. If the temperature is now within its permitted range, the fault was caused by loose connections in the connector. Other information To access the engine coolant temperature (ECT) sensor, see «Engine temperature sensor»(ref-404026-S01967580252011061000000) .

Is the temperature within its permitted range?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking wiring and components»(ref-404040-S41384220632011061000000)

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

1. Ignition off
2. Reconnect connectors, reinstall components etc.
3. Ignition on
4. Read off the engine coolant temperature (ECT) sensor.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S04150805272011061000000)

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. Permanent fault

See Signal too low. Permanent fault

1. Fault-tracing must begin with the engine cold (+20 °C) so that the engine coolant temperature (ECT) sensor can be tested over as wide a temperature range as possible
2. Switch off the climate control system
3. Start the engine. Read off the engine coolant temperature (ECT). Check that the engine coolant temperature (ECT) is within its permitted range and corresponds with the engine warming up.

Is the temperature within its permitted range?

1. YES Refer to «Checking the thermostat»(ref-404040-S32969204422011061000000)
2. NO Refer to «Replacing ECT Sensor»(ref-404040-S15950654242011061000000)

1. Start the engine. Run the engine until the engine coolant temperature (ECT) reaches approximately 100 °C
2. Activate the engine cooling fan (FC) with the engine running
3. Wait approximately 90 seconds and then shut-off the engine cooling fan (FC). Read off the engine coolant temperature (ECT). If it is 85 °C or lower when the fan stops, the thermostat is defective.

Is the engine coolant temperature (ECT) 85 °C or lower?

1. YES Refer to «Replacing thermostat»(ref-404040-S05500976992011061000000)
2. NO Refer to «Information»(ref-404040-S29844522772011061000000)

Replacing ECT Sensor

Try a new engine coolant temperature (ECT) sensor.

Other information

1. To access or replace the engine coolant temperature (ECT) sensor, see «Engine coolant temperature (ECT) sensor, replacing»(ref-404026-S29654956492011061000000) .

1. Continue Refer to «Verification»(ref-404040-S01644886762011061000000)

Replacing thermostat

Try a new thermostat.

Other information

1. To access or replace the thermostat see «Engine coolant temperature (ECT) sensor, replacing»(ref-404026-S29654956492011061000000) .

1. Continue Refer to «Verification»(ref-404040-S01644886762011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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

1. Ignition off.
2. Reconnect connectors, reinstall components
3. Verification must begin with cold engine (+20 °C (68 °F)) so that the engine coolant temperature (ECT) sensor can be tested over as wide a temperature range as possible.
4. Turn off climate control.
5. Start the engine. Read off engine coolant temperature (ECT). Check that the engine coolant temperature (ECT) is within its permitted range and corresponds with the engine warming up.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S29844522772011061000000)

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. Fault-tracing must begin with the engine cold (+20 °C) so that the engine coolant temperature (ECT) sensor can be tested over as wide a temperature range as possible
2. Switch off the climate control system
3. Start the engine. Read off the engine coolant temperature (ECT). Check that the engine coolant temperature (ECT) is within its permitted range and corresponds with the engine warming up.

Is the temperature within its permitted range?

1. YES Refer to «Checking the thermostat»(ref-404040-S05775503712011061000000)
2. NO Refer to «Replacing ECT thermostat»(ref-404040-S16928952142011061000000)

1. Start the engine. Run the engine until the engine coolant temperature (ECT) reaches approximately 100 °C
2. Activate the engine cooling fan (FC) with the engine running
3. Wait approximately 90 seconds and then shut-off the engine cooling fan (FC). Read off the engine coolant temperature (ECT). If it is 85 °C or lower when the fan stops, the thermostat is defective.

Is the engine coolant temperature (ECT) 85 °C or lower?

1. YES Refer to «Replacing thermostat»(ref-404040-S08842418622011061000000)
2. NO Refer to «Information»(ref-404040-S11023344122011061000000)

Replacing ECT thermostat

Try a new engine coolant temperature (ECT) sensor.

Other information

1. To access or replace the engine coolant temperature (ECT) sensor, see «Engine coolant temperature (ECT) sensor, replacing»(ref-404026-S29654956492011061000000) .

1. Continue Refer to «Verification»(ref-404040-S35705426932011061000000)

Try a new thermostat.

Other information

1. To access or replace the thermostat see «Engine coolant temperature (ECT) sensor, replacing»(ref-404026-S29654956492011061000000) .

1. Continue Refer to «Verification»(ref-404040-S35705426932011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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

1. Ignition off.
2. Reconnect connectors, reinstall components
3. Verification must begin with cold engine (+20 °C (68 °F)) so that the engine coolant temperature (ECT) sensor can be tested over as wide a temperature range as possible.
4. Turn off climate control.
5. Start the engine. Read off engine coolant temperature (ECT). Check that the engine coolant temperature (ECT) is within its permitted range and corresponds with the engine warming up.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S11023344122011061000000)

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. 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 defective thermostat.

Try replacing the thermostat. See Temperature sensor engine coolant, replacing .

1. Continue Refer to «Information»(ref-404040-S00926934992011061000000)

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.

Temperature sensor engine coolant, replacing

S60, V70 2000-, V70 XC2001-/XC70

1. For B5xx4x -2001, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-403969-S34824642562011061000000)
2. For B5xx4x 2002-2004, see «Replacing the thermostat and/or engine coolant temperature sensor»(ref-403969-S21007574872011061000000)
3. For B5xx4Tx 2005-, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-438319-S30985992742011120100000) .

S80

1. For B5xx4x -2001, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-403969-S34824642562011061000000)
2. For B5xx4x 2002-2004, see «Replacing the thermostat and/or engine coolant temperature sensor»(ref-403969-S21007574872011061000000)
3. For B5xx4Tx 2005-, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-438319-S30985992742011120100000)
4. For B6xx4x -2001, see «Replacing engine coolant temperature (ECT) sensor»(ref-438318-S41061164292011120100000)
5. For B6xx4x 2002-, see «Replacing the engine coolant temperature (ECT) sensor»(ref-438318-S28623103882011120100000) .

XC90

1. For B5xx4T, see «Replacing the thermostat and/or engine coolant temperature sensor»(ref-403969-S21007574872011061000000)
2. For B6xx4T, see «Engine coolant temperature (ECT) sensor, replacing»(ref-404026-S00524350732011061000000) .

C70

1. For B5xx4T -2002, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-403969-S34824642562011061000000)
2. For B5xx4T 2003-, see «Replacing the thermostat and/or engine coolant temperature sensor»(ref-403969-S21007574872011061000000) .

Faulty signal

See Faulty signal

Checking software

Note. The information below only applies to modal year 2003-2004. For other model years, select the alternative "No".

It may be possible to remedy the fault by downloading new software into the control module.

Action

1. Go to the tab software and program the control module with the latest software.

Other information

1. For more information, see Design and Function.

Scheme 315

Has the fault been remedied?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Diagnostic trouble code (DTC) status ECM-2100, Front heated oxygen sensor (HO2S). Current too high»(ref-404040-S28235780642011061000000)

Checking cables

Check signal cable (+) between control module #A42 and heated oxygen sensor (HO2S) connector terminal 4 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Check signal cable (-) between control module #A41 and heated oxygen sensor (HO2S) connector terminal 3 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Other information

1. To connect the breakout box, see «Connecting the breakout box»(ref-403956-S00897666572011061000000)
2. To access the control module, see «Replacing the engine control module (ECM)»(ref-404033-S34042663912011061000000)
3. To access/replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-404033-S34986958782011061000000)
4. For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000)

1. Continue Refer to «Information»(ref-404040-S21449311542011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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 and let it idle.
4. Read off front heated oxygen sensor (HO2S) signal. Check that the signal is within its permitted range according to: «Signal specification»(ref-403973-S19941283772011061000000) .

Is the signal OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S19413318942011061000000)

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 signal cable (+) between control module #A42 and heated oxygen sensor (HO2S) connector terminal 4 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Check signal cable (-) between control module #A41 and heated oxygen sensor (HO2S) connector terminal 3 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Other information

1. To connect the breakout box, see «Connecting the breakout box»(ref-403956-S00897666572011061000000)
2. To access the control module, see «Replacing the engine control module (ECM)»(ref-404033-S34042663912011061000000)
3. To access/replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-404033-S34986958782011061000000)
4. For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000)

1. Continue Refer to «Information»(ref-404040-S33991030512011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Note. The information below only applies to modal year 2003-2004. For other model years, select the alternative "No".

It may be possible to remedy the fault by downloading new software into the control module.

Action

1. Go to the tab software and program the control module with the latest software.

Other information

1. For more information, see Design and Function.

Has the fault been remedied?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Diagnostic trouble code (DTC) status ECM-2100, Front heated oxygen sensor (HO2S). Current too low»(ref-404040-S42720405132011061000000)

1. Ignition off.
2. Check front heated oxygen sensor (HO2S) connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-403956-S41958999262011061000000) . CAUTION: Do not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector. If wiring is OK, try another heated oxygen sensor (HO2S). Other information To access/replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-404033-S34986958782011061000000)

1. Continue Refer to «Checking connector»(ref-404040-S00972832782011061000000)

1. Ignition off.
2. Reinstall components, reconnect connectors etc.
3. Start the engine and let it idle.
4. Read off front heated oxygen sensor (HO2S) signal. Check that the signal is within its permitted range according to «Signal specification»(ref-403973-S19941283772011061000000) . If signal is now OK this indicates that the fault was caused by poor contact in the connector. Other information To access/replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-404033-S34986958782011061000000) .

Is the signal OK?

1. YES Refer to «Verification»(ref-404040-S24398406392011061000000)
2. NO Refer to «Checking wiring and components»(ref-404040-S11491913512011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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 and let it idle.
4. Read off front heated oxygen sensor (HO2S) signal. Check that the signal is within its permitted range according to: «Signal specification»(ref-403973-S19941283772011061000000) .

Is the signal OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S02421530082011061000000)

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.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Replacing front heated oxygen sensor

Try a new front heated oxygen sensor (HO2S) and select Continue when this has been done.

1. To access/replace the front heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-404033-S34986958782011061000000) .

1. Continue Refer to «Verification»(ref-404040-S22435412822011061000000)

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

1. Ignition off.
2. Reconnect connectors, reinstall components.
3. Start the engine and let it idle.
4. Read off the lambda value for the rear heated oxygen sensor (HO2S). After 25 seconds idling, the value should stabilize at 0.8 - 1.2.

Is the value OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S27949248682011061000000)

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. The information below only applies to modal year 2003-2004. For other model years, select the alternative "No".

It may be possible to remedy the fault by downloading new software into the control module.

Action

1. Go to the tab software and program the control module with the latest software.

Other information

1. For more information, see Design and Function.

Has the fault been remedied?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking for air leakage in the exhaust system»(ref-404040-S17664701652011061000000)

Checking for air leakage in the exhaust system

Check for air leakage according to Checking for air leakage in the exhaust system

Remedy as necessary.

Was there any air leakage?

1. YES Refer to «Verification»(ref-404040-S25627410892011061000000)
2. NO Refer to «Replacing front heated oxygen sensor»(ref-404040-S20103002652011061000000)

Try a new front heated oxygen sensor (HO2S) and select Continue when this has been done.

1. To access/replace the front heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-404033-S34986958782011061000000) .

1. Continue Refer to «Verification»(ref-404040-S25627410892011061000000)

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

1. Ignition off.
2. Reconnect connectors, reinstall components.
3. Start the engine and let it idle.
4. Read off the lambda value for the rear heated oxygen sensor (HO2S). After 25 seconds idling, the value should stabilize at 0.8 - 1.2.

Is the value OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S30960600772011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Note. The information below only applies to modal year 2003-2004. For other model years, select the alternative "No".

It may be possible to remedy the fault by downloading new software into the control module.

Action

1. Go to the tab software and program the control module with the latest software.

Other information

1. For more information, see Design and Function.

Has the fault been remedied?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Diagnostic trouble code status ECM-2110, front heated oxygen sensor, warming»(ref-404040-S42761858002011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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

1. Ignition off
2. Reconnect connectors, reinstall components
3. Ignition on
4. Read off the heater element resistance in the front heated oxygen sensor (HO2S). The resistance should be 0.5-3 ohms at 20 °C.

Is the value correct?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S20979131292011061000000)

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.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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

1. Ignition off
2. Reconnect connectors, reinstall components
3. Ignition on
4. Read off the heater element resistance in the front heated oxygen sensor (HO2S). The resistance should be 0.5-3 ohms at 20 °C.

Is the value correct?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S30142727062011061000000)

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. The information below only applies to modal year 2003-2004. For other model years, select the alternative "No".

It may be possible to remedy the fault by downloading new software into the control module.

Action

1. Go to the tab software and program the control module with the latest software.

Other information

1. For more information, see Design and Function.

Has the fault been remedied?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «DTC status ECM-2120, Front heated oxygen sensor (HO2S), control Signal too high»(ref-404040-S07668742862011061000000)

Check signal cable (+) between control module #A42 and transmission connector #4 for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults and an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Check signal cable (-) between control module #A41 and transmission connector #3 for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults and an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Other information

1. To connect the breakout box, see «Connecting the breakout box»(ref-403956-S00897666572011061000000)
2. To access the control module, see «Replacing the engine control module (ECM)»(ref-404033-S34042663912011061000000)
3. To access/replace the heated oxygen sensor (HO2S) «Heated oxygen sensor (HO2S), replacing»(ref-404033-S34986958782011061000000)
4. For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000) .

1. Continue Refer to «Information»(ref-404040-S33795180942011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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

1. Ignition off.
2. Reconnect connectors, reinstall components
3. Start the engine and let it idle.
4. Read off the lambda value for the rear heated oxygen sensor (HO2S). NOTE: It takes approximately 25 seconds before fuel trim starts. Check that the value is within its permitted range. The value should be approximately 0.98 -1.02.

Is the value OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S13467040832011061000000)

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. The information below only applies to modal year 2003-2004. For other model years, select the alternative "No".

It may be possible to remedy the fault by downloading new software into the control module.

Action

1. Go to the tab software and program the control module with the latest software.

Other information

1. For more information, see Design and Function.

Has the fault been remedied?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «DTC status ECM-2120, front heated oxygen sensor (HO2S), control»(ref-404040-S37191484052011061000000)

Check front heated oxygen sensor (HO2S) connector for contact resistance and oxidation according to Contact resistance and oxidation .

Check signal cable (+) between control module #A42 and heated oxygen sensor (HO2S) connector terminal 4 for an intermittent open-circuit according to Open-circuit, intermittent faults .

Check signal cable (-) between control module #A41 and heated oxygen sensor (HO2S) connector terminal 3 for an intermittent open-circuit according to Open-circuit, intermittent faults .

Other information

1. To connect the breakout box, see «Connecting the breakout box»(ref-403956-S00897666572011061000000)
2. To access the control module, see «Replacing the engine control module (ECM)»(ref-404033-S34042663912011061000000)
3. To access/replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-404033-S34986958782011061000000)
4. For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000) .

1. Continue Refer to «Information»(ref-404040-S14808837842011061000000)

1. Ignition off. Check front heated oxygen sensor (HO2S) connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-403956-S41958999262011061000000) . CAUTION: Do not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector. Remedy as necessary. Other information To access/replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-404033-S34986958782011061000000) For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000)

1. Continue Refer to «Checking connector»(ref-404040-S39396271952011061000000)

1. Ignition off.
2. Reinstall components, reconnect connectors etc.
3. Start the engine and let it idle.
4. Read off the lambda value for the rear heated oxygen sensor (HO2S). NOTE: It takes approximately 25 seconds before fuel trim starts. Check that the value is within its permitted range. The value should be approximately 0.98 and 1.02. If the value is now OK it means that the cause of the fault has been loose connections in connector. Other information To access/replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-404033-S34986958782011061000000) For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000) .

Is the value OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking wiring and components»(ref-404040-S14552914132011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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

1. Ignition off.
2. Reconnect connectors, reinstall components
3. Start the engine and let it idle.
4. Read off the lambda value for the rear heated oxygen sensor (HO2S). NOTE: It takes approximately 25 seconds before fuel trim starts. Check that the value is within its permitted range. The value should be approximately 0.98 -1.02.

Is the value OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S16477028272011061000000)

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. The information below only applies to modal year 2003-2004. For other model years, select the alternative "No".

It may be possible to remedy the fault by downloading new software into the control module.

Action

1. Go to the tab software and program the control module with the latest software.

Other information

1. For more information, see Design and Function.

Has the fault been remedied?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Diagnostic trouble code (DTC) status ECM-2200, Rear heated oxygen sensor (HO2S), control. Signal too high»(ref-404040-S02388639022011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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

1. Ignition off.
2. Reconnect connectors, reinstall components etc.
3. Start the engine and let it idle.
4. Read off the signal from the rear heated oxygen sensor (HO2S). NOTE: It takes approximately 50 seconds before fuel trim starts. Check that the signal is within its permitted range. The signal should rise and exceed 0.67 V.

Is the value OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S30188804462011061000000)

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. The information below only applies to modal year 2003-2004. For other model years, select the alternative "No".

It may be possible to remedy the fault by downloading new software into the control module.

Action

1. Go to the tab software and program the control module with the latest software.

Other information

1. For more information, see Design and Function.

Has the fault been remedied?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Diagnostic trouble code (DTC) status ECM-2200, Rear heated oxygen sensor (HO2S), control. Signal too low»(ref-404040-S34470459982011061000000)

1. Ignition off. Check the rear heated oxygen sensor (HO2S) connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-403956-S41958999262011061000000) . CAUTION: Do not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector. Remedy as necessary. Other information To access / replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-404033-S34986958782011061000000) For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000) .

1. Continue Refer to «Checking the connector»(ref-404040-S11533039422011061000000)

1. Ignition off.
2. Reinstall the components, reconnect the connectors etc.
3. Start the engine and let it idle.
4. Read off the signal for the rear heated oxygen sensor (HO2S). NOTE: It takes approximately 50 seconds before fuel trim starts. Check that the signal is within its permitted range. The signal should rise and exceed 0.67 V. If the value is now OK, the cause of the fault was loose connections in the connector. Other information To access / replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-404033-S34986958782011061000000) For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000) .

Is the value OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking wiring and components»(ref-404040-S02025411472011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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

1. Ignition off.
2. Reconnect connectors, reinstall components etc.
3. Start the engine and let it idle.
4. Read off the signal from the rear heated oxygen sensor (HO2S). NOTE: It takes approximately 50 seconds before fuel trim starts. Check that the signal is within its permitted range. The signal should rise and exceed 0.67 V.

Is the value OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S04998121812011061000000)

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. The information below only applies to modal year 2003-2004. For other model years, select the alternative "No".

It may be possible to remedy the fault by downloading new software into the control module.

Action

1. Go to the tab software and program the control module with the latest software.

Other information

1. For more information, see Design and Function.

Has the fault been remedied?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Replacing rear heated oxygen sensor»(ref-404040-S39995142942011061000000)

Replacing rear heated oxygen sensor

Try a new rear heated oxygen sensor (HO2S) and select Continue when this has been done.

1. To access/replace the rear heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-404033-S34986958782011061000000) .

1. Continue Refer to «Verification»(ref-404040-S34890839232011061000000)

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

1. Ignition off.
2. Reconnect connectors, reinstall components
3. Start the engine and let it idle.
4. Read off the value of rear heated oxygen sensor (HO2S) target voltage. The value should increase and exceed 0.67 V within 5 minutes.

Is the value OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S31995026622011061000000)

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. The information below only applies to modal year 2003-2004. For other model years, select the alternative "No".

It may be possible to remedy the fault by downloading new software into the control module.

Action

1. Go to the tab software and program the control module with the latest software.

Other information

1. For more information, see Design and Function.

Has the fault been remedied?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking for air leakage in the exhaust system»(ref-404040-S30276801672011061000000)

Check for air leakage according to Checking for air leakage in the exhaust system .

Remedy as necessary.

Was there any air leakage?

1. YES Refer to «Verification»(ref-404040-S19633823302011061000000)
2. NO Refer to «Replacing rear heated oxygen sensor»(ref-404040-S34928222492011061000000)

Try a new rear heated oxygen sensor (HO2S) and select Continue when this has been done.

1. To access/replace the rear heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-404033-S34986958782011061000000) .

1. Continue Refer to «Verification»(ref-404040-S19633823302011061000000)

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

1. Ignition off.
2. Reconnect connectors, reinstall components
3. Start the engine and let it idle.
4. Read off the value of rear heated oxygen sensor (HO2S) target voltage. The value should increase and exceed 0.67 V within 5 minutes.

Is the value OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S30653454002011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Note. The information below only applies to modal year 2003-2004. For other model years, select the alternative "No".

It may be possible to remedy the fault by downloading new software into the control module.

Action

1. Go to the tab software and program the control module with the latest software.

Other information

1. For more information, see Design and Function.

Has the fault been remedied?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Diagnostic trouble code status ECM-2210, rear heated oxygen sensor, warming»(ref-404040-S10109387072011061000000)

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

1. Ignition off.
2. Reconnect connectors, reinstall components
3. Start the engine and let it idle.
4. Read off the signal for the rear heated oxygen sensor (HO2S). NOTE: It takes approximately 50 seconds before fuel trim starts. Check that the signal is within its permitted range. The signal should rise and exceed 0.67 V.

Is the value OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S09768054742011061000000)

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.

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Note. The information below only applies to modal year 2003-2004. For other model years, select the alternative "No".

It may be possible to remedy the fault by downloading new software into the control module.

Action

1. Go to the tab software and program the control module with the latest software.

Other information

1. For more information, see Design and Function.

Has the fault been remedied?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Diagnostic trouble code (DTC) status ECM-2210 Rear heated oxygen sensor (HO2S), heating»(ref-404040-S10711176012011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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

1. Ignition off.
2. Reconnect connectors, reinstall components
3. Start the engine and let it idle.
4. Read off the signal for the rear heated oxygen sensor (HO2S). NOTE: It takes approximately 50 seconds before fuel trim starts. Check that the signal is within its permitted range. The signal should rise and exceed 0.67 V.

Is the value OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S30614699522011061000000)

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 for intermittent faults

1. Activate the relevant injector. A click should be heard from the injector when it is activated.

Is the injector working?

1. YES Refer to «Fault-tracing information»(ref-404040-S32954433042011091500000)
2. NO Refer to «Checking the connector»(ref-404040-S30319584892011091500000)

1. Ignition off. Check the injector connector. Check for contact resistance and oxidation. Remedy as necessary. Other information To access or replace the injector, see «Injector/pulse damper, replacement»(ref-404036-S08834393832011061000000) See «Checking wiring and terminals»(ref-438291-S01987812252011120100000) .

1. Continue Refer to «Checking the connector»(ref-404040-S14165534712011091500000)

1. Ignition off
2. Reinstall the components, reconnect the connectors etc.
3. Ignition on
4. Activate the injector which caused the diagnostic trouble code (DTC) to be stored
5. A click should be heard from the injector when it is activated. If the injector is now OK, the fault was caused by poor contact in the connector. Other information To access or replace the injector, see «Injector/pulse damper, replacement»(ref-404036-S08834393832011061000000) .

Is the injector working?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking injectors»(ref-404040-S12762481702011091500000)

Scheme 316

Check the cable between injector terminal 2 and the control module

1. terminal #16 for ECM-2300
2. terminal #34 for ECM-2310
3. terminal #15 for ECM-2320
4. terminal #33 for ECM-2330
5. terminal #14 for ECM-2340.

Check for an open-circuit. Check for short-circuit to supply voltage. Check for a short-circuit to ground.

Check the resistance between terminals #1 and #2 on the injector. It should be 10-20 ohms at approximately 20 °C.

Check the cable between injector connector terminal #1 and fuse 3 in the integrated relay / fusebox in the engine compartment. Check for an open-circuit.

HINT: With the ignition on, the voltage between injector terminal 1 and ground terminal must be battery voltage.

Remedy as necessary.

Other information

1. See «Checking wiring and terminals»(ref-438291-S01987812252011120100000) .

Scheme 317

1. Continue Refer to «Verification»(ref-404040-S35058824862011091500000)

The control module has previously registered a fault. The fault is now no longer present.

1. Continue Refer to «Information»(ref-404040-S27944143382011091500000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

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

1. Ignition off.
2. Reconnect connectors, reinstall components
3. Ignition on.
4. Activate the relevant injector. A click should be heard from the injector when it is activated.

Is the injector working?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-404040-S24989052372011091500000)

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.