Engine Control Module (ECM) Diagnostic Trouble Codes (Xc) - 1 of 9: Other Volvo V70 II

Fault-tracing information

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

1. Continue Refer to «Information»(ref-430960-S39152794802011101900000)

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/signal too low. Intermittent fault

See Signal too high/signal too low. Intermittent fault

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 too high/signal too low. Permanent fault

See Signal too high/signal too low. Permanent fault

Checking components and connectors

Check the connector for the outside temperature sensor. Check for contact resistance and oxidation.

The 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 and replace the outside temperature sensor for other models, see «Outside temperature sensor door mirror, replacing»(ref-451706-S29619527482012020900000)
2. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

Scheme 488

1. Continue Refer to «Verification»(ref-430960-S15262719102011101900000)

Verification

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

Scheme 489

Scheme 490

Scheme 491

1. Ignition off.
2. Reconnect connectors, reinstall components.
3. Ignition on.
4. Read off outside temperature.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S20598495802011101900000)

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

See Faulty signal

Resistance values

1. For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) .
2. For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) .
3. For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) .
4. For 5-cylinder normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000)

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 outside temperature.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S22877831502011101900000)

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

Checking cables and connectors

Check signal cable between control module #B29 (#B39) and outside temperature 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-430911-S30587875092011101900000) .
2. To access/replace the outside temperature sensor, see «Outside temperature sensor door mirror, replacing»(ref-451706-S29619527482012020900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «Signal specification (B5204T5, B5234T3, B5234T7 and B5244T3 -2004)»(ref-430960-S07426811312012010900000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430960-S22796688192012010900000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .

1. Continue Refer to «Information»(ref-430960-S25302704802011101900000)

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 outside temperature.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S09863730332011101900000)

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 outside temperature.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S22605121242011101900000)

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

Checking connector

1. Ignition off
2. Check wiring and connectors for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-451698-S16578065902012020900000) .
3. Reinstall components, reconnect connectors etc.
4. Ignition on.
5. Read off outside temperature. If the temperature is now within its permitted range, the fault was caused by loose connections in the connector. Other information To access/replace the outside temperature sensor see «Outside temperature sensor door mirror, replacing»(ref-451706-S29619527482012020900000) .

Is the temperature within its permitted range?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking wiring and components»(ref-430960-S34037237822011101900000)

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 outside temperature.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S18282344202011101900000)

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

Check signal cable between control module #B29 (#B39) and outside temperature #1 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 ground lead between control module #B2 (#B12) and outside temperature sensor #2 for an intermittent open-circuit according to Open-circuit, intermittent faults

Other information

1. Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) .
2. To access/replace the outside temperature sensor, see «Outside temperature sensor door mirror, replacing»(ref-451706-S29619527482012020900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «Signal specification (B5204T5, B5234T3, B5234T7 and B5244T3 -2004)»(ref-430960-S07426811312012010900000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430960-S22796688192012010900000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .

1. Continue Refer to «Information»(ref-430960-S03719504122011101900000)

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 ECM

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), replacing

Remedy as necessary.

1. Continue Refer to «Information»(ref-430960-S32827430042011101900000)

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

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
4. 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-430960-S34068217672011101900000)

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 intake air temperature (IAT). The Intake Air Temperature (IAT) sensor is integrated into the Mass Air Flow (MAF) sensor.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S01002689002011101900000)

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

1. Ignition off
2. Check the boost pressure sensor connector. Check for contact resistance and oxidation. NOTE: The intake air temperature (IAT) sensor is integrated in the boost pressure sensor
3. Reinstall the components, reconnect the connectors etc.
4. Ignition on
5. Read off the intake air temperature (IAT). Check that the intake air temperature (IAT) is within its permitted range. If the intake air temperature (IAT) is now within its permitted range, the fault was caused by loose connections in the connector. Other information: For B5xx4T -2004, see «Intake Air Temperature Sensor (IAT Sensor), replacing»(ref-430961-S37786365552011101900000) For B5xx4T 2005-, see «Temperature and pressure sensors, replacing»(ref-430961-S28993638692011101900000) .

Is the temperature within its permitted range?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking the wiring and component»(ref-430960-S05767797842011101900000)

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
4. 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-430960-S22214564242011101900000)

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).

1. Ignition off
2. Check the intake air temperature (IAT) sensor connector. Check for contact resistance and oxidation
3. Reinstall the components, reconnect the connectors etc.
4. Ignition on
5. Read off the signal from the intake air temperature (IAT) sensor. Check that the signal is within its permitted range. The voltage may vary between 0.17 V and 4.9 V depending on the air temperature. At 20° C voltage should be approximately 3.5 V. If the signal is now OK, the fault was caused by poor contact in the connector. Other information For B5xx4T -2004, see «Intake Air Temperature Sensor (IAT Sensor), replacing»(ref-430961-S37786365552011101900000) For B5xx4T 2005-, see «Temperature and pressure sensors, replacing»(ref-430961-S28993638692011101900000) . See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

Is the signal OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking the wiring and component»(ref-430960-S17949769152011101900000)

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 intake air temperature (IAT). The Intake Air Temperature (IAT) sensor is integrated into the Mass Air Flow (MAF) sensor.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S25878637802011101900000)

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 and terminal. Check for contact resistance and oxidation. NOTE: The intake air temperature (IAT) sensor is integrated in the boost pressure sensor. If no errors are found and the fault is permanent, replace the intake air temperature (IAT) sensor. Remedy as necessary. Other information: See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) For resistance values, see «Resistance values»(ref-430960-S21506212742012010900000) For B5xx4T -2004, see «Intake Air Temperature Sensor (IAT Sensor), replacing»(ref-430961-S37786365552011101900000) For B5xx4T 2005-, see «Temperature and pressure sensors, replacing»(ref-430961-S28993638692011101900000) .

1. Continue Refer to «Verification»(ref-430960-S04908022882011101900000)

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

Scheme 492

1. Ignition off
2. Reconnect the connectors, reinstall components etc.
3. Start the engine. Allow the engine to idle for 5 minutes
4. Read off diagnostic trouble codes (DTCs). The fault has been remedied if status of the diagnostic trouble code (DTC) is intermittent.

Is the status of the diagnostic trouble code (DTC) intermittent?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S20803730872011101900000)

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 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 inside of the throttle body (TB). Check for contamination. When the throttle body (TB) is contaminated, the air flow to the engine is impaired and diagnostic trouble code (DTCs) or fault symptoms can occur.

Clean the throttle body (TB) if needed.

If no fault is found, try a new mass air flow(MAF) sensor.

Remedy as necessary.

Other information

1. See «Air leakage in the intake system, checking»(ref-430964-S09157528512011101900000)
2. See «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000)
3. See «Mass air flow (MAF) sensor, replacing»(ref-430965-S11807502952011101900000)
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430960-S00363332602011101900000)

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 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-430960-S34550718922011101900000)

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

Check the induction system for air leaks. 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 inside of the throttle body (TB). Check for contamination. When the throttle body (TB) is contaminated, the air flow to the engine is impaired and diagnostic trouble code (DTCs) or fault symptoms can occur. Clean the throttle body (TB) if needed.

Remedy as necessary.

Other information

1. See «Air leakage in the intake system, checking»(ref-430964-S09157528512011101900000)
2. See «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000)
3. See «Mass air flow (MAF) sensor, replacing»(ref-430965-S11807502952011101900000)
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430960-S39314460032011101900000)

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 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-430960-S41598600472011101900000)

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 or too high

See Flow too low or too high

See Flow too low or too high

Installing the mass air flow (MAF) sensor

Note. Apply water to the O-ring in the air filter cover to facilitate installation of the mass air flow sensor.

Install the new mass air flow (MAF) sensor.

Press the mass air flow (MAF) sensor into place.

Install the screws. Tighten.

Install the pipe on the mass air flow (MAF) sensor.

Connect the mass air flow (MAF) sensor connector.

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 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 may vary by between 12-20 kg/h at idle speed, depending on the engine load and temperature. The value may be in excess of 20 kg/h if the engine is cold
6. Increase the engine speed (RPM) and check that the air flow increases with increased engine speed.

Are the values correct?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S37267898552011101900000)

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.

Preparations

Check that all hoses are undamaged and are in place with their hose clips tightened.

Connecting

Remove fresh air hose from mass air flow (MAF) sensor.

Install tool 9995545 with pressure regulator 9995544 on fresh air hose and tighten hose clamp.

Use hose clip to seal crankcase ventilation hose.

Remove oil filler cap.

Remove the lower hose from the canister purge (CP) valve.

Scheme 493

Connect the compressed air hose and adjust the regulator to obtain a pressure of maximum 0.3 bar .

A gentle hissing sound can be heard from the oil filler opening. This is due to the opening of an intake valve and the leakage of cylinder pressure past the piston rings.

If a leak is suspected spray a soap solution onto the area.

Small bubbles are permissible between throttle body (TB) and intake hose (if made of plastic). No bubbles are permissible with rubber hose.

Check for air leakage from canister purge (CP) valve. No leakage is permissible.

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 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 may vary by between 12-20 kg/h at idle speed, depending on the engine load and temperature. The value may be in excess of 20 kg/h if the engine is cold
6. Increase the engine speed (RPM) and check that the air flow increases with increased engine speed.

Are the values correct?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S05879158862011101900000)

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. 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-430960-S41277745802011101900000)

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. 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-430960-S17680035562011101900000)

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. 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-430960-S18980977832011101900000)

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. 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-430960-S28464629852011101900000)

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 / signal too high

See Signal too low / signal too high

Check signal cable between engine control module (ECM) #A22 (#A22) and mass air flow (MAF) sensor #5 for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Check power supply cable between engine control module (ECM) #A58 (#A58) and mass air flow (MAF) sensor #3 for an intermittent open-circuit according to Open-circuit, intermittent faults

Other information

1. Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) .
2. To access/replace the Mass Air Flow (MAF) sensor, see «Mass air flow sensor (MAF), replacing»(ref-430960-S30927504012012010900000) .
3. With the ignition on and mass air flow (MAF) sensor connector connected the voltage at mass air flow (MAF) sensor #2 should be approximately U bat , mass air flow (MAF) sensor #3 should be ground and mass air flow (MAF) sensor #5 should be approximately 1 volt.
4. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «Signal specification (B5204T5, B5234T3, B5234T7 and B5244T3 -2004)»(ref-430960-S07426811312012010900000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430960-S22796688192012010900000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .

1. Continue Refer to «Information»(ref-430960-S41825410572011101900000)

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).

Identifying upgraded software ECM/ETM

Upgraded software for the engine control module (ECM) and electronic throttle module (ETM), available during 2006 or later, can be identified. The updated software has the diagnostic number/software number as set out in the table under USA/Canada market .

The differences between the first version , which is identified by the software number, and the second version , which is identified by the diagnostic number, include the following

1. Improved driveability after engine control module (ECM) reset. The start values for some system adaptations are adjusted to facilitate handling of aged/worn systems/components after diagnostic trouble code deletion or when the control module has been without power.
2. Increased hardiness to certain combinations of aging/wear in the system. The work areas for some adaptations are adjusted to better match the aging of certain components.
3. Supplements as to which faults are to generate a message to the driver.
4. Improved serviceability (diagnostic trouble code generation) for some intermittent faults that generate driveability problems.

The electronic throttle module (ETM) is identified solely by the diagnostic number.

If the diagnostic number/software number is within the following series, it is the latest software downloaded

1. 5-cyl non-turbo engines B5244SG/B5244SG2 (Bifuel) , (all markets excluding USA/Canada): Engine control module (ECM) diagnostic number 31219965 - 31219968 or 30788502 and Electronic throttle module (ETM) diagnostic number 30785387.
2. Other 5-cyl non-turbo engines , (all markets): Engine control module (ECM) diagnostic number 30785129 - 30785132 or 30785667 and electronic throttle module (ETM) 30785387.

USA/Canada market

Flow too high. Intermittent fault

See Flow too high. Intermittent fault

See Flow too high. Intermittent fault

Checking cables

Check the cable between engine control module (ECM) #A22 (#A22) and mass air flow (MAF) sensor #5 for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Check the ground lead between #A58 (#A58) and mass air flow (MAF) sensor #3 for an open-circuit according to Open-circuit, permanent faults

Remedy as necessary

Other information

1. Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) .
2. To access/replace the Mass Air Flow (MAF) sensor, see «Mass air flow sensor (MAF), replacing»(ref-430960-S30927504012012010900000) .
3. With the ignition on and the mass air flow (MAF) sensor connector connected the voltage at mass air flow (MAF) sensor #2 should be approximately U batt , mass air flow (MAF) sensor #3 should be ground and mass air flow (MAF) sensor #5 should be approximately 1 V.
4. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «Signal specification (B5204T5, B5234T3, B5234T7 and B5244T3 -2004)»(ref-430960-S07426811312012010900000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430960-S22796688192012010900000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .

1. Continue Refer to «Verification»(ref-430960-S34930401362011101900000)

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 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 may vary by between 12-20 kg/h at idle speed, depending on the engine load and temperature. The value may be in excess of 20 kg/h if the engine is cold
6. Increase the engine speed (RPM) and check that the air flow increases with increased engine speed.

Are the values correct?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S04548263252011101900000)

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 high. Permanent fault

See Flow too high. Permanent fault

See Flow too high. Permanent fault

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 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 may vary by between 12-20 kg/h at idle speed, depending on the engine load and temperature. The value may be in excess of 20 kg/h if the engine is cold
6. Increase the engine speed (RPM) and check that the air flow increases with increased engine speed.

Are the values correct?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S35746161862011101900000)

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).

Flow too low

See Flow too low

See Flow too low

1. Ignition off
2. Check mass air flow (MAF) sensor connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-451698-S16578065902012020900000) .
3. Reinstall components, reconnect connectors etc.
4. Ignition on.
5. Check that the air flow corresponds, the value should be approximately 0 kg/h with engine switched off.
6. Start the engine and read off the air flow which should be approximately 14 kg/h (30.9 lb) when idling.
7. Increase the engine speed (RPM) and check that the air flow increases with increased engine speed. If the values correspond it means that the cause of the fault has been loose connections in the connector. Other information To access/replace the mass air flow (MAF) sensor, see «Mass air flow sensor (MAF), replacing»(ref-430960-S30927504012012010900000) .

Is the function OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking component and wiring»(ref-430960-S18430331562011101900000)

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 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 may vary by between 12-20 kg/h at idle speed, depending on the engine load and temperature. The value may be in excess of 20 kg/h if the engine is cold
6. Increase the engine speed (RPM) and check that the air flow increases with increased engine speed.

Are the values correct?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S21120837382011101900000)

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 Flow too low

Read off fault type

Actual fault type with data.

Previous fault type

This fault type may be the same as above, although not necessarily.

All read off data is based on this fault type.

Time before the data was frozen

How long the fault existed before the frozen values were created.

Time after engine start

How long since the engine was started.

Outside temperature

Displays the actual outside temperature when the frozen values were created. The value is given in °C.

Atmospheric pressure

Displays the actual atmospheric pressure when the frozen values were created. The value is given in hPa.

Vehicle speed

Displays the actual vehicle speed when the frozen values were created. The value is given in km/h.

Engine speed

Displays the actual engine speed (RPM) when the frozen values were created. The value is given in RPM.

Mass air flow g/stroke

Displays the actual mass air flow in g/stroke when the frozen values were created.

Intake pressure

Displays the actual pressure in the intake manifold when the frozen values were created. The value is given in hPa.

Engine coolant temperature (ECT)

Displays the actual engine temperature when the frozen values were created. The value is given in °C.

Lambda compensation

Lambda compensation is rapid adjustment of the fuel adaptation value which continually adjusts the fuel air mixture. The area of adjustment is between 0-2. The normal value is 1 (no adaptation).

Long term fuel trim

Long term fuel trim is slow adjustment of the fuel trim value that is used to adapt the fuel / air mixture during longer periods. This value takes into consideration factors such as the aging of components and component tolerances etc. The area of adjustment is between 0-2. The normal value is 1 (no adaptation).

Accelerator pedal (AP) affected

Indicates whether the accelerator pedal (AP) was depressed or not when the frozen values were created.

Probe control

Indicates whether the engine was regulated using fuel trim or not when the frozen values were created.

Fuel shut-off system

Indicates whether the fuel shut-off system was active or not when the frozen values were created.

Operating cycle

Indicates whether the engine was active or not when the frozen values were created.

This happens when the engine speed (RPM) exceeds 600 RPM

Warm-up cycle

Indicates whether a warm-up cycle had been run or not when the frozen values were created.

A warm-up cycle is run if the engine coolant temperature (ECT) is between -7° C and +35° C when the engine is started.

Gear selected

Indicates whether a gear was selected or not when the frozen values were created.

Engine cooling fan (FC)

Indicates whether the engine cooling fan (FC) was active or not when the frozen values were created.

A/C requested

Indicates whether the air conditioning (A/C) was selected or not when the frozen values were created.

Air-conditioning: (A/C) compressor active

Indicates whether the air conditioning (A/C) compressor was active or not when the frozen values were created.

Brake pedal switch

Indicates whether the brake pedal was affected or not when the frozen values were created.

EVAP canister purge valve active

Indicates whether the EVAP canister purge valve was active or not when the frozen values were created.

Cruise control active

Indicates whether the cruise control was active or not when the frozen values were created.

EVAP canister shut-off valve

Indicates whether the EVAP canister shut-off valve was active or not when the frozen values were created.

State, fuel trim

Depending on the prevailing circumstances when the frozen values were created, one of the following alternatives may be stored.

1. no fuel trim, the start conditions have not been met . This condition occurs at the crank or immediately after start before fuel trim has started
2. fuel trim with two probes . This situation occurs during driving when both probes are used during fuel trim (part load)
3. no fuel trim, operation with predefined values . This situation occurs during hard acceleration or during fuel shut-off when there is no fuel trim and operation is under predefined values
4. no fuel trim, operation with a system fault . This situation occurs when an earlier diagnostic trouble code (DTC) was stored that caused the fuel trim to be disabled
5. fuel trim with one probe (front) . This situation occurs at idling speed or during light acceleration when one probe (front) is used during fuel trim.

Battery voltage

Displays the actual battery voltage when the frozen values were created.

Passenger compartment temperature

Displays the temperature in the passenger compartment in the instant the frozen values were created.

Odometer setting

Displays the odometer setting in the instant the frozen values were created.

Example of use of the frozen values

Faults can be intermittent, which is important to remember when fault-tracing for possible causes. If the fault is not present when the vehicle is in the workshop, a fault cause can be missed as the values can be correct when fault-tracing is carried out. A good indication of when the fault occurred the first time are the frozen values that can be read out using VIDA/Details.

The frozen values are stored immediately after a fault has been detected. Most parameters in the frozen values are the same for all faults and indicates a general status when a fault has been detected, e. g. engine speed, load, coolant temperature, vehicle speed and battery voltage. Some of them have been selected to give a better understanding of the specific fault. Diagnostic Trouble Code (DTC) ECM-903F Throttle position (TP) can be used as an example of how the frozen values can be used (this is only one example and there may be deviations in reality).

One of the checks given in fault-tracing is "voltage supply to throttle unit" and continues with a suggestion to check the battery and charging system. However, the battery's condition, with the vehicle in the workshop, does not show the battery voltage when the fault was detected. The best information is in the frozen values, i. e. the voltage that the Engine control module (ECM) detected, when the Electronic throttle module (ETM) indicated the fault.

However, remember that this is not an indication of the voltage supply to the Electronic throttle module (ETM), but to the Engine control module (ECM). If the Engine control module (ECM), according to the frozen values, had a good voltage, the battery worked. The voltage supply to the Electronic throttle module (ETM) should therefore be checked separately.

In this case, we assume that the vehicle had a low battery voltage in the workshop. As seen in the frozen values however, the battery voltage was correct when the fault occurred, and this was therefore probably not the cause. This is an example of how the frozen values can be used, to make fault-tracing more efficient and prevent taking too much time fault-tracing incorrectly. This prevents fault-tracing and correcting a fault that was not actually the cause of the problem, which was originally to be solved.

The odometer setting (km) is included among the frozen values in the Engine control module (ECM). This makes a fast comparison with the odometer counter possible, so that one can determine if the fault occurred as part of the fault-tracing and can be ignored.

For example, the CAN related diagnostic Trouble Codes (DTCs) can be detected when the battery voltage drops when working on the vehicle, by the passenger compartment lighting and other loads draining the battery. The frozen values indicate the odometer setting in km. Multiplying this value by 0.62 gives the distance in miles. The current distance in miles and km can be read out using VIDA.

The following should be taken into account when using frozen values for fault-tracing. The frozen values, that should be used with care, are those that have been stored for CAN and are related to Diagnostic Trouble Codes (DTCs) for the Electronic throttle module (ETM).

If the Electronic throttle module (ETM) detects that the communication to the Engine control module (ECM) is interrupted, error flags are stored in the Electronic throttle module (ETM). These error flags are sent to the Engine control module (ECM) as soon as communication on the CAN is working again. This means that the Engine control module (ECM) stores the Diagnostic Trouble Codes (DTCs) as soon as the Electronic throttle module (ETM) supplies them.

This, in turn means that it is at this time that the frozen values are stored. For the Electronic throttle module (ETM) this means that the frozen values occur from a point in time after the fault first occurred.

Checking components, intake system

Check using information about combined diagnostic trouble codes if this trouble code is a root problem or not. If the diagnostic trouble code is stored as lone diagnostic trouble code or if it is indicated as a root problem, continue with the troubleshooting below, otherwise follow troubleshooting for the diagnostic trouble code pointed out as root problem.

ECM-130A can be generated due to a damaged mass air flow sensor. An indication of this is that the engine control system has increased the fuel amount at partial load and then primarily the value for "Lambda adaption, upper partial load". If any of the diagnostic trouble codes ECM-260A, ECM-261A, ECM-270A and/or ECM-271A with trouble type Upper limit is stored together with ECM-130A, troubleshoot according to any of these diagnostic trouble codes, otherwise continue according to the following.

Read off "Air mass, correction value" and check in which way the air adaption has gone. A low value, less than approx. 0.85 indicates a clogged crankcase ventilation and/or dirty throttle module. A higher value, greater than approximately 1.15, indicates a (smaller) air leak somewhere in the intake system.

High value

Check the induction system for air leaks.

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

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

Low value

For markets where upgraded software, released during year 2006 or later, is available, then if ECM-91A7 and/or ECM-91B7 is stored together with ECM-130A, then the throttle module shall be cleaned.

Otherwise, the solution to the diagnostic trouble code/symptom is to load the upgraded software in the vehicle.

For markets where upgraded software, released during year 2006 or later, is not available, the solution is to clean the throttle module and the crankcase ventilation.

See Identifying upgraded software ECM/ETM

Remedy as necessary.

Other information

1. See «Information about combined diagnostic trouble codes (DTCs)»(ref-430960-S06965984952012011000000)
2. See «Air leakage in the intake system, checking»(ref-430964-S09157528512011101900000)
3. See «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000)
4. See «Mass air flow (MAF) sensor, replacing»(ref-430965-S11807502952011101900000)

1. Continue Refer to «Information»(ref-430960-S10262970742011101900000)

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.

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-430960-S06965984952012011000000)
2. See «Air leakage in the intake system, checking»(ref-430964-S09157528512011101900000)
3. See «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000)
4. See «Mass air flow (MAF) sensor, replacing»(ref-430965-S11807502952011101900000)

1. Continue Refer to «Verification»(ref-430960-S38693214102011101900000)

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 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-430960-S19909275942011101900000)

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 that the hoses and hose connectors between the mass air flow (MAF) sensor and the throttle unit are not leaking or defective.

Check that the boost pressure sensor is correctly mounted. Check for air leakage around the component.

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

Remedy as necessary.

Other information

1. See «Check for air leaks in the intake system»(ref-430960-S11506455582012010900000)
2. See «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000)
3. See «Mass air flow (MAF) sensor, replacing»(ref-430965-S11807502952011101900000)

1. Continue Refer to «Verification»(ref-430960-S04484932492011101900000)

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 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-430960-S10138066842011101900000)

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

See Signal too low

See Faulty signal

1. Ignition off
2. Check the boost pressure sensor connector and terminal. Check for contact resistance and oxidation. NOTE: The intake air temperature (IAT) sensor is integrated in the boost pressure sensor. If no errors are found and the fault is permanent, replace the intake air temperature (IAT) sensor. Remedy as necessary. Other information: See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) For resistance values: «Resistance values»(ref-430960-S21506212742012010900000) For B5xx4T -2004, see «Intake Air Temperature Sensor (IAT Sensor), replacing»(ref-430961-S37786365552011101900000) For B5xx4T 2005-, see «Temperature and pressure sensors, replacing»(ref-430961-S28993638692011101900000) .

1. Continue Refer to «Verification»(ref-430960-S25698758252011101900000)

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. Allow the engine to idle for 5 minutes
4. Read off diagnostic trouble codes (DTCs). The fault has been remedied if status of the diagnostic trouble code (DTC) is intermittent.

Is the status of the diagnostic trouble code (DTC) intermittent?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S01970111682011101900000)

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

Checking the status

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-430960-S09568730382011101900000)

Scheme 494

Scheme 495

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-430911-S30587875092011101900000) For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «Signal specification (B5204T5, B5234T3, B5234T7 and B5244T3 -2004)»(ref-430960-S07426811312012010900000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430960-S22796688192012010900000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . See «Resistance values»(ref-430960-S21506212742012010900000) For B5xx4T -2004, see «Intake Air Temperature Sensor (IAT Sensor), replacing»(ref-430961-S37786365552011101900000) For B5xx4T 2005-, see «Temperature and pressure sensors, replacing»(ref-430961-S28993638692011101900000) . See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)

1. Continue Refer to «Verification»(ref-430960-S05188164262011101900000)

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-430960-S40707329462011101900000)

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 Signal too high

See Signal too low

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 outside temperature.

Is the temperature within its permitted range?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S04385430962011101900000)

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 or signal missing

See Faulty signal or signal missing

Information

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.

For further information on this diagnostic trouble code, see Diagnostic trouble code (DTC) information.

See Fault-tracing information

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

For further information on this diagnostic trouble code, see Diagnostic trouble code (DTC) information.

See Fault-tracing information

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. For B5xx4T -2004, see «Intake Air Temperature Sensor (IAT Sensor), replacing»(ref-430961-S37786365552011101900000)
2. For B5xx4T 2005-, see «Temperature and pressure sensors, replacing»(ref-430961-S28993638692011101900000) .
3. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Verification»(ref-430960-S33558136092011101900000)

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

Scheme 496

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-430960-S15918511472011101900000)

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. 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 be due to 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: For B5xx4T -2004, see «Intake Air Temperature Sensor (IAT Sensor), replacing»(ref-430961-S37786365552011101900000) For B5xx4T 2005-, see «Temperature and pressure sensors, replacing»(ref-430961-S28993638692011101900000) . See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Verification»(ref-430960-S36378724782011101900000)

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

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-430960-S29261404472011101900000)

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: For B5xx4T -2004, see «Intake Air Temperature Sensor (IAT Sensor), replacing»(ref-430961-S37786365552011101900000) For B5xx4T 2005-, see «Temperature and pressure sensors, replacing»(ref-430961-S28993638692011101900000) . See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

Is the signal OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking components and wiring»(ref-430960-S07763594002011101900000)

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 signal. With the ignition on the voltage should be approximately 1.9 V.

Is the signal OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S08468934782011101900000)

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).

Signal too high. Intermittent fault

See Signal too high. Intermittent fault

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 For B5xx4T -2004, see «Intake Air Temperature Sensor (IAT Sensor), replacing»(ref-430961-S37786365552011101900000) For B5xx4T 2005-, see «Temperature and pressure sensors, replacing»(ref-430961-S28993638692011101900000) . See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

Is the signal OK?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking components and wiring»(ref-430960-S01033985182011101900000)

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-430960-S14632866562011101900000)

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

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 signal. With the ignition on the voltage should be approximately 1.9 V.

Is the signal OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S08039942292011101900000)

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).

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-430960-S17840147752011101900000)

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

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. Read off the boost pressure and the atmospheric pressure. The difference in pressure must not be greater than 140 hPa. If the difference is less than 140 hPa, the cause of the fault was loose connections in the connector. Other information: For B5xx4T -2004, see «Intake Air Temperature Sensor (IAT Sensor), replacing»(ref-430961-S37786365552011101900000) For B5xx4T 2005-, see «Temperature and pressure sensors, replacing»(ref-430961-S28993638692011101900000) .

Is the difference between the pressures less than 140 hPa?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Replacing the boost pressure sensor»(ref-430960-S22364698132011101900000)

Replacing the boost pressure sensor

If the difference between the pressures is greater than 140 hPa, try replacing the boost pressure sensor.

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).

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 B5xx4T -2004, see «Intake Air Temperature Sensor (IAT Sensor), replacing»(ref-430961-S37786365552011101900000)
3. For B5xx4T 2005-, see «Temperature and pressure sensors, replacing»(ref-430961-S28993638692011101900000) .
4. To access or replace the engine control module (ECM), see «Engine control module (ECM), replacing»(ref-430961-S10976842282011101900000)
5. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «Signal specification (B5204T5, B5234T3, B5234T7 and B5244T3 -2004)»(ref-430960-S07426811312012010900000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430960-S22796688192012010900000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .

1. Continue Refer to «Verification»(ref-430960-S27218094102011101900000)

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-430960-S23738680312011101900000)

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 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-430961-S06986295272011101900000) .
2. To access/replace the engine control module (ECM), see «Engine control module (ECM), replacing»(ref-430961-S10976842282011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «Signal specification (B5204T5, B5234T3, B5234T7 and B5244T3 -2004)»(ref-430960-S07426811312012010900000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430960-S22796688192012010900000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .

1. Continue Refer to «Information»(ref-430960-S10994759772011101900000)

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 boost pressure sensor connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-451698-S16578065902012020900000) .
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-430961-S06986295272011101900000) .

Is the difference between the pressures less than 140 hPa?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Replacing MAP Sensor»(ref-430960-S06221274762011101900000)

Replacing MAP Sensor

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: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «Signal specification (B5204T5, B5234T3, B5234T7 and B5244T3 -2004)»(ref-430960-S07426811312012010900000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430960-S22796688192012010900000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .

1. Continue Refer to «Verification»(ref-430960-S25546781282011101900000)

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-430960-S41821339402011101900000)

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 engine coolant temperature (ECT)

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 reasonable?

1. YES Refer to «Checking the thermostat»(ref-430960-S39949548242011101900000)
2. NO Refer to «Replacing the ECT»(ref-430960-S34649138092011101900000)

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 the temperature 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-430960-S06867380342011101900000)
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

Try a new thermostat.

1. For B5xx4Tx 1999-, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-430971-S38695460582011101900000)
2. For B5xx4Tx -2002, see «Replacing the thermostat and/or engine coolant temperature sensor»(ref-430971-S11844984362011101900000)
3. For B5xx4Tx 2005-, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-430971-S36682453302011101900000) .

Scheme 497

Replacing the ECT

Try a new engine coolant temperature (ECT) sensor.

1. For B5xx4x -2001, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-430971-S38695460582011101900000)
2. For B5xx4x 2002-2004, see «Replacing the thermostat and/or engine coolant temperature sensor»(ref-430971-S11844984362011101900000)
3. For B5xx4Tx 2005-, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-430971-S36682453302011101900000) .

1. Continue Refer to «Verification»(ref-430960-S10113622602011101900000)

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-430960-S31245751142011101900000)

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).

Scheme 498

1. Jack up the car.
2. Remove protection cover from under engine.
3. Drain the coolant as described in «Replacing radiator/charge air cooler (CAC)»(ref-430960-S03240542202012011000000) .
4. Lower the car.
5. Release coolant hose from thermostat housing using pliers.
6. Remove thermostat housing.
7. Remove sensor.

Follow-on work

1. Fill up coolant.
2. Warm the engine until the thermostat opens. Switch engine off and check the level. Re-fill if necessary.
3. Check for leaks.
4. Check in VIDA vehicle communication (read-out of parameter values), for current engine system, that the engine temperature shown appears correct.

Replacing radiator/charge air cooler (CAC)

Special tools

9995972

Scheme 499

Applies to cars with air conditioning (A/C)

Drain A/C system according to Draining/vacuum pumping/filling with coolant and leak-finding .

Remove the condenser hoses at the compressor and at the drier.

Remove

1. the negative battery cable. First read «Battery, disconnecting»(ref-430959-S32245976082011101900000) .
2. air duct to control module box.
3. air cleaner (ACL) housing intake pipe from connection above radiator. Twist the pipe up.
4. The canister purge (CP) valve from mounting on the fan shroud.
5. release wiring from fan shroud.

Lift out expansion tank hose from the holders on top of fan shroud.

Disconnect both engine cooling fan (FC) connectors.

Remove

1. the charge air pipe over the engine.
2. both screws holding fan shroud. Carefully lift engine cooling fan (FC).
3. expansion tank cap.

Block upper radiator hose with lock grip pliers.

Scheme 500

1. the splash guard under the engine
2. screw for engine wiring cable duct mounting at front edge of subframe.

Scheme 501

Drain coolant

1. Remove front splash guard and air baffles.
2. Block lower hose with lock grip pliers.
3. Apply a hose on nipple at radiator.
4. Feed the hose down to a container.
5. Open nipple and drain off coolant.

Scheme 502

Remove

1. upper radiator hose. Put to one side
2. expansion tank hose at tank. Disconnect hose from clip so that it comes with the radiator
3. intake hose to and outlet hose from charge air cooler (CAC). HINT: When disconnecting outlet hose it is easier if the connection is heated with hot air gun 115 82 84 around the terminal.

Scheme 503

Remove

1. drain hose and tighten nipple on radiator
2. lower radiator hose. Place to one side and seal openings.
3. container

Position a mobile jack with universal plate 9995972 under the radiator assembly.

1. both mounting screws

Hold the radiator assembly and carefully lower it.

Scheme 504

Place the air conditioning aggregate on a level surface.

Remove the four screws holding the air conditioning aggregate together.

Replace cooler unit/charge air cooler (CAC).

Assemble air conditioning aggregate with the four screws.

Installing cooler unit

Position the radiator assembly on the mobile jack's universal plate 9995972 .

Hold cooler unit and carefully raise it into position in the bodywork.

Install both the mounting screws and tighten to 25 Nm .

Install

1. lower radiator hose. Remove lock grip pliers
2. screw for engine wiring cable duct mounting at front edge of subframe
3. front splash guard and air baffles.

Scheme 505

Install

1. upper radiator hose. Remove lock grip pliers
2. hose to expansion tank. Secure hose with clips
3. the plastic pipe to the charge air cooler (CAC)
4. the condenser hoses at the compressor and at the drier.

Scheme 506

Carefully lower the fan shroud and align it with the holes at the sides of the radiator.

Tighten both mounting screws.

Connect engine cooling fan (FC) connectors.

Install charge air pipe over engine.

Press hose down from expansion tank into holder on fan shroud.

Secure wiring with tie straps as before.

Press canister purge (CP) valve into holder on fan shroud.

Turn down air cleaner (ACL) intake manifold and locate against sleeve connector above air conditioning aggregate.

Connect the negative battery cable. First read Battery, disconnecting .

Fill the AC system. See Draining/vacuum pumping/filling with coolant and leak-finding .

Fill coolant

Install expansion tank cap.

Run the engine until the thermostat has opened.

Stop engine and top up coolant if 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-430960-S27925130072011101900000)
2. NO Refer to «Replacing the ECT»(ref-430960-S14677872922011101900000)

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-430960-S31798683412011101900000)
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 .

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

1. Continue Refer to «Verification»(ref-430960-S35174391242011101900000)

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-430960-S04078602782011101900000)

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-430960-S18628367142011101900000)

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-430911-S30587875092011101900000) .
2. To access the engine coolant temperature (ECT) sensor, see «Engine temperature sensor»(ref-430960-S26945617692012011000000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «Signal specification (B5204T5, B5234T3, B5234T7 and B5244T3 -2004)»(ref-430960-S07426811312012010900000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430960-S22796688192012010900000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. For information about the resistance values, see «Resistance values»(ref-430960-S21506212742012010900000) .

1. Continue Refer to «Information»(ref-430960-S12795645412011101900000)

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. 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-430960-S20894917832011101900000)

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 connector on the engine coolant temperature (ECT) sensor. Check for contact resistance and oxidation
3. Reinstall the components, reconnect the 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 See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) To access the engine coolant temperature (ECT) sensor: For B5xx4x -2001, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-430971-S38695460582011101900000) For B5xx4x 2002-2004, see «Replacing the thermostat and/or engine coolant temperature sensor»(ref-430971-S11844984362011101900000) For B5xx4Tx 2005-, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-430971-S36682453302011101900000) .

Is the temperature within its permitted range?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking the wiring and component»(ref-430960-S09299181352011101900000)

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-430960-S02158660622011101900000)

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).

1. Ignition off
2. Check the engine coolant temperature (ECT) sensor connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-451698-S16578065902012020900000) .
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-430960-S26945617692012011000000) .

Is the temperature within its permitted range?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Checking wiring and components»(ref-430960-S11291001762011101900000)

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-430960-S42705559482011101900000)

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. Activate the relevant injector. A "click" should be heard when the injector is activated.

Is the injector working?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S08914019562011101900000)

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. Activate the relevant injector. A "click" should be heard when the injector is activated.

Is the injector working?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S31864078342011101900000)

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. Activate the relevant injector. A "click" should be heard when the injector is activated.

Is the injector working?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430960-S39379238102011101900000)

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.

1. For B5xx4x -2001, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-430971-S38695460582011101900000)
2. For B5xx4x 2002-2004, see «Replacing the thermostat and/or engine coolant temperature sensor»(ref-430971-S11844984362011101900000)
3. For B5xx4Tx 2005-, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-430971-S36682453302011101900000) .

1. Continue Refer to «Information»(ref-430960-S15863153432011101900000)

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 Faulty signal

Signal missing

See Signal missing

See Signal too high

See Signal too low

See Signal missing

See Signal too high

See Signal too low

See Signal missing

See Signal too high

See Signal too low

See Signal missing

See Signal too high

See Signal too low

Checking the fuel injection system

Check the intake system for air leakage.

HINT: Air leakage in the intake system can occur through the evaporative emission system (EVAP) valve, the secondary air solenoid valve or the power brake booster.

Check the fuel pressure.

Test drive the car for approximately 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.

Remedy as necessary.

Other information

1. See «Check for air leaks in the intake system»(ref-430960-S11506455582012010900000)
2. See «Checking fuel and residual pressures»(ref-430972-S11080112202011101900000)
3. See «Mass air flow sensor (MAF), replacing»(ref-430960-S30927504012012010900000)

1. Continue Refer to «Verification»(ref-430960-S03600843162011101900000)

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. Run a TRIP schedule so that the engine control module (ECM) compares the diagnostics. To run a TRIP schedule, see: «Verifying repairs»(ref-430972-S31879278172011101900000)
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 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-430960-S04675835102011101900000)

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 intake system for air leakage.

HINT: Air leakage in the intake system can occur through the evaporative emission system (EVAP) valve, the secondary air solenoid valve or the power brake booster.

Check the exhaust system for leakage.

Check the fuel pressure and residual pressure.

Check that the oil level is within the minimum and maximum markings.

Check the viscosity of the engine oil by reading off the short-term fuel trim with the engine running. Plug the crankcase ventilation and read off the short-term fuel trim again. The value must be more or less unchanged.

Remedy as necessary.

Other information

1. See «Check for air leaks in the intake system»(ref-430960-S11506455582012010900000)
2. For 1999 model year cars, see «Checking for air leakage in the exhaust system (1999)»(ref-430960-S03955675762012011000000)
3. For 2000- model year cars, see «Checking for air leakage in the exhaust system (2000-)»(ref-430960-S28378481652012011000000) .
4. See «Checking fuel and residual pressures»(ref-430972-S11080112202011101900000)

Was a fault detected?

1. YES Refer to «Verification»(ref-430960-S04277416532011101900000)
2. NO Refer to «Checking the mass air flow (MAF) sensor»(ref-430960-S40950561992011101900000)

Checking the mass air flow (MAF) sensor

Test drive the car for approximately 10 minutes.

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

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

Remedy as necessary.

Other information

1. See «Mass air flow sensor (MAF), replacing»(ref-430960-S30927504012012010900000) .

1. Continue Refer to «Verification»(ref-430960-S04277416532011101900000)

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. Run a TRIP schedule so that the engine control module (ECM) compares the diagnostics. To run a TRIP schedule, see: «Verifying repairs»(ref-430972-S31879278172011101900000)
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 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-430960-S14173958002011101900000)

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 intake system for air leakage.

HINT: Air leakage in the intake system can occur through the evaporative emission system (EVAP) valve, the secondary air solenoid valve or the power brake booster.

Check the fuel pressure.

Test drive the car for approximately 10 minutes.

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

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

Remedy as necessary.

Other information

1. See «Check for air leaks in the intake system»(ref-430960-S11506455582012010900000)
2. See «Checking fuel and residual pressures»(ref-430972-S11080112202011101900000)
3. See «Mass air flow sensor (MAF), replacing»(ref-430960-S30927504012012010900000)

1. Continue Refer to «Verification»(ref-430960-S31465962442011101900000)

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. Run a TRIP schedule so that the engine control module (ECM) compares the diagnostics. To run a TRIP schedule, see: «Verifying repairs»(ref-430972-S31879278172011101900000)
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 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-430960-S12944375122011101900000)

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 intake system for air leakage.

HINT: Air leakage in the intake system can occur through the evaporative emission system (EVAP) valve, the secondary air solenoid valve or the power brake booster.

Check the exhaust system for leakage.

Check the fuel pressure and residual pressure.

Check that the oil level is within the minimum and maximum markings.

Check the viscosity of the engine oil by reading off the short-term fuel trim with the engine running. Plug the crankcase ventilation and read off the short-term fuel trim again. The value must be more or less unchanged.

Remedy as necessary.

Other information

1. See «Check for air leaks in the intake system»(ref-430960-S11506455582012010900000)
2. For 1999 model year cars, see «Checking for air leakage in the exhaust system (1999)»(ref-430960-S03955675762012011000000)
3. For 2000- model year cars, see «Checking for air leakage in the exhaust system (2000-)»(ref-430960-S28378481652012011000000) .
4. See «Checking fuel and residual pressures»(ref-430972-S11080112202011101900000)

Was a fault detected?

1. YES Refer to «Verification»(ref-430960-S22520895172011101900000)
2. NO Refer to «Checking the mass air flow (MAF) sensor»(ref-430960-S17764181632012011000000)

Checking for air leakage in the exhaust system (2000-)

Special tools

9995544

9995546

Scheme 507

Install tool 9995546 and pressure regulator 9995544 on the exhaust system.

Adjust the pressure to 0.4 bar . Depending on the condition of the exhaust system a lower pressure may be necessary.

Scheme 508

Check the exhaust system. Spray a soap solution on all joints and connections between the cylinder head and the rear heated oxygen sensor (HO2S).

Only very small and slow bubbles are permissible.

Checking for air leakage in the exhaust system (1999)

Special tools

9995544

9997085

Note. The illustrations in this service information are used for different model years and / or models. Some variation may occur. However, the essential information in the illustrations is always correct.

Scheme 509

Remove

1. the nut where the three-way catalytic converter (TWC) and exhaust system separate
2. the gasket. Separate the exhaust system from the three-way catalytic converter (TWC).

Scheme 510

Install

1. The tool (1) «9997085»(ref-403953-S05162907402011061000000) using a new gasket
2. pressure regulator «9995544»(ref-403953-S05241159092011061000000) on tool «9997085»(ref-403953-S05162907402011061000000) . Adjust the pressure to 0.4 bar .

Check

Check the exhaust system by spraying a soap solution on all joints and connections between the cylinder head and the rear heated oxygen sensor (HO2S). Only very small and slow bubbles are permissible.

Removing tools

Remove

1. pressure regulator «9995544»(ref-403953-S05241159092011061000000)
2. tool «9997085»(ref-403953-S05162907402011061000000) .

Installing components

Install

1. a new gasket where the exhaust system and three-way catalytic converter (TWC) divide
2. a new nut for the exhaust system. Tighten.

Start the engine. Check for leaks where the three-way catalytic converter (TWC) and the exhaust system divide.

Test drive the car for approximately 10 minutes.

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

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

Remedy as necessary.

Other information

1. See «Mass air flow sensor (MAF), replacing»(ref-430960-S30927504012012010900000) .

1. Continue Refer to «Verification»(ref-430960-S22520895172011101900000)

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. Run a TRIP schedule so that the engine control module (ECM) compares the diagnostics. To run a TRIP schedule, see: «Verifying repairs»(ref-430972-S31879278172011101900000)
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 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-430960-S07702828392011101900000)

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

Check the intake system for air leakage.

HINT: Air leakage in the intake system can occur through the evaporative emission system (EVAP) valve, the secondary air solenoid valve or the 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 2 and 12.

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

Remedy as necessary.

Other information

1. See «Check for air leaks in the intake system»(ref-430960-S11506455582012010900000)
2. See «Mass air flow sensor (MAF), replacing»(ref-430960-S30927504012012010900000) .

1. Continue Refer to «Verification»(ref-430960-S00789954322011101900000)

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. Run a TRIP schedule so that the engine control module (ECM) compares the diagnostics. To run a TRIP schedule, see: «Verifying repairs»(ref-430972-S31879278172011101900000)
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 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-430960-S33760681102011101900000)

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 intake system for air leakage.

HINT: Air leakage in the intake system can occur through the evaporative emission system (EVAP) valve, the secondary air solenoid valve or the power brake booster.

Check the exhaust system for leakage.

Check the fuel pressure and residual pressure.

Check that the oil level is within the minimum and maximum markings.

Check the viscosity of the engine oil by reading off the short-term fuel trim with the engine running. Plug the crankcase ventilation and read off the short-term fuel trim again. The value must be more or less unchanged.

Remedy as necessary.

Other information

1. See «Check for air leaks in the intake system»(ref-430960-S11506455582012010900000)
2. For 1999 model year cars, see «Checking for air leakage in the exhaust system (1999)»(ref-430960-S03955675762012011000000)
3. For 2000- model year cars, see «Checking for air leakage in the exhaust system (2000-)»(ref-430960-S28378481652012011000000) .
4. See «Checking fuel and residual pressures»(ref-430972-S11080112202011101900000)

1. Continue Refer to «Checking the mass air flow (MAF) sensor»(ref-430960-S17989011972011101900000)

Read off the correction factor of the mass air flow (MAF) sensor. The value must be between 2 and 12.

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

Remedy as necessary.

Other information

1. See «Mass air flow sensor (MAF), replacing»(ref-430960-S30927504012012010900000) .

1. Continue Refer to «Verification»(ref-430960-S13924984282011101900000)

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. Run a TRIP schedule so that the engine control module (ECM) compares the diagnostics. To run a TRIP schedule, see: «Verifying repairs»(ref-430972-S31879278172011101900000)
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 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-430960-S18989758632011101900000)

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

See Fault-tracing information

See Fault-tracing information

See Fault-tracing information

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. For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000)
2. For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430960-S27249940002011101900000)

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. 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. Increase the engine speed to 2500 RPM until the diagnostic is "Complete". 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-430960-S18899254092011101900000)

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 the connectors, reinstall components etc.
3. Start the engine. Allow the engine to idle for at least 1 minute
4. Test drive the car at an even speed (approximately 80 km/h for at least 5 minutes)
5. 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 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-430960-S17872904132011101900000)

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/Signal missing

See Signal too high/Signal too low/Signal missing

See Signal too high/Signal too low/Signal missing

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 run it until the engine coolant temperature exceeds 60 °C
4. Switch off the engine and allow it to cool (below 40 °C)
5. Test drive the car on the road (engine speed (RPM) above 2000 RPM, never idling) for at least 15 minutes
6. 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 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-430960-S02964756892011101900000)

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 the connectors, reinstall components etc.
3. Start the engine and run it until the engine coolant temperature exceeds 60 °C
4. Switch off the engine and allow it to cool (below 40 °C)
5. Test drive the car on the road (engine speed (RPM) above 2000 RPM, never idling) for at least 15 minutes
6. 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 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-430960-S39303911822011101900000)

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.