Engine Control Module (ECM) Diagnostic Trouble Codes (Xc) - 8 of 9: Other Volvo V70 II

Faulty signal

See Faulty signal

See Faulty signal

Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)

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 806

Remove the hose clamp from the mass air flow (MAF) sensor. Disconnect the connector from the mass air flow (MAF) sensor.

Remove

1. the 4 x screws for the fresh air intake (1) between the front cover plate and the air cleaner (ACL). Remove the hose
2. the 3 x screws for the air cleaner (ACL)
3. the air cleaner (ACL) (2) assembly
4. the charge air pipe between the charge air cooler (CAC) and the electronic throttle module (ETM).

Scheme 807

Disconnect the connector for the electronic throttle module.

Remove the 4 x screws for the electronic throttle module (ETM).

Lift out the electronic throttle module (ETM). Discard the gasket.

Replacing the electronic throttle module (ETM)

Install a new electronic throttle module (ETM). Use a new gasket. Tighten the 4 screws.

Installing the air cleaner (ACL)

HINT: Heat the pipe at the connections to facilitate installation.

Install

1. the charge air pipe between the electronic throttle module (ETM) and the charge air cooler (CAC). Tighten the hose clamps
2. the air cleaner (ACL) (2) assembly. Tighten the screws
3. the fresh air intake (1) between the air cleaner (ACL) and the front cover plate. Tighten the screws. Connect the connector to the mass air flow (MAF) sensor. Tighten the hose clamp.

Finishing

After replacing the electronic throttle module (ETM), the electronic throttle module (ETM) must be adapted. See: VIDA vehicle communication: "Adaptation of the electronic throttle unit".

Start the vehicle. Check the function.

Verification

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

Scheme 808

Scheme 809

Scheme 810

1. Ignition off
2. Reinstall the connectors, components etc.
3. Start the engine
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-430995-S26231417792011101900000)

Fault-tracing information

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Signal too high

See Signal too high

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

1. Ignition off
2. Reinstall the connectors, components etc.
3. Start the engine
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-430995-S25075295742011101900000)

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

See Fault-tracing information

See Fault-tracing information

Checking components

Diagnostic trouble code (DTC) ECM-917F may be stored alone but it is very unusual. Usually it is stored together with one or more other diagnostic trouble codes (DTCs) that indicate faults in any of the signals from the accelerator pedal. If one or several of the diagnostic trouble codes (DTCs) ECM-9180, ECM-918F, ECM-950F, ECM-951F, ECM-9520, ECM-958F and/or ECM-959F are stored together with ECM-917F, continue fault-tracing according to one of these diagnostic trouble codes (DTCs). Otherwise, continue as follows.

Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. The values show the problem's current status and how intermittent the problem is. If the diagnostic trouble code (DTC) was stored under operating conditions that means external factors, such as low battery voltage during engine start-up, are suspected to be the cause fault-trace and remedy as necessary. Otherwise, continue as follows.

1. Check the cable for the pulse width modulated (PWM) signal between Electronic throttle module (ETM) terminal #1 and Engine control module (ECM) terminal #A56. Check for an open-circuit.

For markets where upgraded software, released during year 2006 or later, is available, the solution may be to download the upgraded software. As the detection time has increased from 0.4to 0.9 seconds, the upgraded software becomes more tolerant towards short intermittent interferences, delays in communication between other CAN connected control modules etc. among other things.

Remedy as necessary.

Other information

1. See «Identifying upgraded software ECM/ETM»(ref-430995-S36282700162012011100000)
2. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)

1. Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
2. Then turn on the ignition and turn it off again.
3. Wait another three minutes. If the electric cooling fan is running, you have to wait another two minutes after the electric cooling fan has stopped, to make sure that Electronic throttle module (ETM) has been shut off correctly.

If this is not done correctly, diagnostic trouble codes may remain even after deleting diagnostic trouble codes and any reconfiguration may remain, despite the problem being fixed.

Scheme 811

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. Non-turbo engines : Engine control module (ECM) diagnostic number 30785129 - 30785132 or 30785667 and electronic throttle module (ETM) 30785387.
2. Turbocharged engines : First version, engine control module (ECM) software number 30785203 - 30785240 and electronic throttle module (ETM) diagnostic number 30785388. Second version, engine control module (ECM) diagnostic number 30785372 - 30785378 and electronic throttle module (ETM) diagnostic number 30785388.

USA/Canada market

See Faulty signal

Checking components and connections

Non-turbo engines

Diagnostic trouble code ECM-9180 is always stored together with ECM-918F. Fault trace for ECM-918F.

Turbo engines

Check whether the engine control module (ECM) has stored any other diagnostic trouble codes that indicate a fault in the pulse width modulated (PWM) signal from the accelerator pedal position sensor. Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. The values show the problem's current status and how intermittent the problem is.

If, for example, diagnostic trouble code (DTC), ECM-9520 is stored and it was stored at approximately the same time as ECM-9180, this indicates that the Engine control module (ECM) and Electronic throttle module (ETM) have detected a problem with the pulse width modulated (PWM) signal from the accelerator pedal position sensor. Then use the diagnostic trouble code (DTC) information from ECM-9520 to determine which type of fault cause could have caused the diagnostic trouble codes (DTCs).

If, however, ECM-959F is stored together with ECM-9180 and ECM-958F is not stored, this indicates that the Engine control module (ECM) has detected that the pulse width modulated (PWM) signal is OK, but that the Electronic throttle module (ETM) has detected that the signal is incorrect. Due to this, it is possible to determine if the fault has occurred for longer than 0.5 seconds (1 second for upgraded software), because the signal from the Electronic throttle module (ETM) must be incorrect for more than 0.5 seconds, for ECM-959F to be stored.

1. Check the cable between Engine control module (ECM) terminal #A56 (#A56) and Electronic throttle module (ETM) terminal #1. Check for an open-circuit.

If there is not another diagnostic trouble code (DTC) that indicates that the pulse width modulated (PWM) signal is incorrect stored, this means that the signal that reaches the Engine control module (ECM) is OK. It may also be the case that the fault is so short-term that the other diagnostics in the Engine control module (ECM) have not managed to detect the fault. This can depend on whether the engine has been started or not when the fault was detected. If the engine speed was at 0 RPM in the frozen values, this indicates that the fault has been stored for longer than 0.1 seconds, but for less than 0.4 seconds, otherwise ECM-958F would have been stored. If, however the frozen values show that the engine speed was greater than 0 RPM, when the fault occurred, this indicates that the signal that the Engine control module (ECM) receives is OK. Otherwise ECM-9520 would have been stored together with ECM-9180.

1. Check the cable between Engine control module (ECM) terminal #A56 (#A56) and Electronic throttle module (ETM) terminal #1. Check for an intermittent open-circuit.

Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. If the fault was stored at a battery voltage lower than 10 V with engine speed at 0 RPM, this indicates that the fault may have occurred when the engine was started. This, in turn, indicates that the battery's charging status is not OK.

1. Check the battery status.

For markets where upgraded software, released during year 2006 or later, is available, the solution may be to download the upgraded software. As the detection time has increased from 0.1 to 0.9 seconds, the upgraded software becomes much more tolerant towards short intermittent interference among other things.

Remedy as necessary.

Other information

1. See «Identifying upgraded software ECM/ETM»(ref-430995-S36282700162012011100000)
2. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)

1. Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
2. Then turn on the ignition and turn it off again.
3. Wait another three minutes. If the electric cooling fan is running, you have to wait another two minutes after the electric cooling fan has stopped, to make sure that Electronic throttle module (ETM) has been shut off correctly.

If this is not done correctly, diagnostic trouble codes may remain even after deleting diagnostic trouble codes and any reconfiguration may remain, despite the problem being fixed.

See Fault-tracing information

See Fault-tracing information

Programming or replacing the engine control module (ECM)

1. Ignition off. The engine control module (ECM) has registered an internal fault. Replace the engine control module (ECM). See «Engine control module (ECM), replacing»(ref-430961-S10976842282011101900000) . NOTE: After replacing the engine control module (ECM), the throttle unit must be adapted using the vehicle communication input: "Throttle unit adaptation". Remedy as necessary.

Internal fault. Permanent fault

See Internal fault. Permanent fault

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 the throttle unit

Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. The values show the problem's current status and how intermittent the problem is. Check if the diagnostic trouble code has been generated during engine start and if the battery voltage was very low at that time.

If the trouble code was stored when battery voltage was low and engine speed was close to 0 RPM when the fault occurred, it could indicate that the fault arose when the vehicle was stationary with the ignition on for a long period, thereby draining the battery, or that the fault arose due to battery voltage becoming low when the customer started the engine. This, in turn, indicates that the battery's charging status is not OK.

Check the battery charge status, connections to the battery and chassis and the battery cables for contact resistance and oxidation.

Remedy as necessary. Otherwise, continue as follows.

If the frozen values indicate that battery voltage was OK, try a new throttle unit (ETM).

Remedy as necessary.

Other information

1. To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) .
2. See «Identifying upgraded software ECM/ETM»(ref-430995-S36282700162012011100000)
3. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)

If this is not done correctly, diagnostic trouble codes may remain even after deleting diagnostic trouble codes and any reconfiguration may remain, despite the problem being fixed.

Checking the fault status

1. Ignition off
2. Start the engine
3. Read off the diagnostic status and the fault status for diagnostic trouble code (DTC) ECM-919A. Check the fault status when the status of the diagnostic is COMPLETED. If the fault status is "NO FAULT FOUND" when the diagnostic status is COMPLETED the fault is intermittent at the moment.

1. Continue Refer to «Checking components and wiring»(ref-430995-S06805863452011101900000)

Throttle body (TB), cleaning (2005- B5244T5)

Remove the throttle body Throttle body (electronic throttle module (ETM)), replacing (2005- B5244T5) .

Scheme 812

Clean the throttle body with a brush.

Use: Cleaner, 1161826

Ensure that all deposits are removed from the marked surfaces.

Scheme 813

Carefully wipe clean the air duct on both sides of the throttle disc. Also wipe clean the edge of the throttle disc.

Install the throttle body Throttle body (electronic throttle module (ETM)), replacing (2005- B5244T5)

Throttle body (electronic throttle module (ETM)), replacing (2005- B5244T5)

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.

Removing the air cleaner (ACL)

Remove the hose clamp from the mass air flow (MAF) sensor. Disconnect the connector from the mass air flow (MAF) sensor.

Remove

1. the 4 x screws for the fresh air intake (1) between the front cover plate and the air cleaner (ACL). Remove the hose
2. the 3 x screws for the air cleaner (ACL)
3. the air cleaner (ACL) (2) assembly
4. the charge air pipe between the charge air cooler (CAC) and the electronic throttle module (ETM).

Removing the electronic throttle module (ETM)

Disconnect the connector for the electronic throttle module.

Remove the 4 x screws for the electronic throttle module (ETM).

Lift out the electronic throttle module (ETM). Discard the gasket.

Install a new electronic throttle module (ETM). Use a new gasket. Tighten the 4 screws.

HINT: Heat the pipe at the connections to facilitate installation.

Install

1. the charge air pipe between the electronic throttle module (ETM) and the charge air cooler (CAC). Tighten the hose clamps
2. the air cleaner (ACL) (2) assembly. Tighten the screws
3. the fresh air intake (1) between the air cleaner (ACL) and the front cover plate. Tighten the screws. Connect the connector to the mass air flow (MAF) sensor. Tighten the hose clamp.

After replacing the electronic throttle module (ETM), the electronic throttle module (ETM) must be adapted. See: VIDA vehicle communication: "Adaptation of the electronic throttle unit".

Start the vehicle. Check the function.

Adaptation of the throttle unit

Note. The ignition must be switched on for at least 30 seconds after the basic conditions are met in order for the adaptation to start. It takes approximately 10 seconds to run the adaptation.

Scheme 814

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on
4. Read off the parameters. Check that the following basic conditions for adaptation of the throttle unit are met. Ignition on / engine off Battery voltage above 10 V Accelerator pedal (AP) unaffected The car must be stationary (no vehicle speed signal) Engine coolant temperature (ECT) between 5-100 °C Intake air temperature (IAT) above 5 °C. Remedy as necessary. Check that the adaptation is correctly run after the "Adaptation of the throttle unit running" parameter changes status from "YES" to "NO". When all basic conditions are met, the adaptation must be completed after approximately 40 seconds. When the adaptation is completed correctly, the following information will be displayed: Adaptation of the throttle unit: OK Adaptation of the throttle unit running: NO.

1. Continue Refer to «Verification»(ref-430995-S42055234492011101900000)

1. Ignition off
2. Reinstall the connectors, components etc.
3. Start the engine
4. Read off the diagnostic status and the fault status for diagnostic trouble code (DTC) ECM-919A. 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" when the status of the diagnostic is completed?

1. YES OKAY: Troubleshooting has been completed.
2. NO Refer to «Programming the engine control module (ECM)»(ref-430995-S10065835712011101900000)

Programming the engine control module (ECM)

HINT: This diagnostic trouble code (DTC) may be caused by faulty software.

1. Ignition off. Try downloading new software into the engine control module (ECM). To download new software, see «Engine control module (ECM), replacing»(ref-430961-S10976842282011101900000) . Remedy as necessary.

1. Continue Refer to «Adaptation of the throttle unit»(ref-430995-S06335455512011101900000)

Note. The ignition must be switched on for at least 30 seconds after the basic conditions are met in order for the adaptation to start. It takes approximately 10 seconds to run the adaptation.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on
4. Read off the parameters. Check that the following basic conditions for adaptation of the throttle unit are met. Ignition on / engine off Battery voltage above 10 V Accelerator pedal (AP) unaffected The car must be stationary (no vehicle speed signal) Engine coolant temperature (ECT) between 5-100 °C Intake air temperature (IAT) above 5 °C. Remedy as necessary. Check that the adaptation is correctly run after the "Adaptation of the throttle unit running" parameter changes status from "YES" to "NO". When all basic conditions are met, the adaptation must be completed after approximately 40 seconds. When the adaptation is completed correctly, the following information will be displayed: Adaptation of the throttle unit: OK Adaptation of the throttle unit running: NO.

1. Continue Refer to «Verification»(ref-430995-S04644691752011101900000)

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

1. Ignition off
2. Reinstall the connectors, components etc.
3. Start the engine
4. Read off the diagnostic status and the fault status for diagnostic trouble code (DTC) ECM-919A. 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. Remedy as necessary.

Is the fault status is "NO FAULT FOUND"?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430995-S24835794712011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

See Faulty signal

Check whether the engine control module (ECM) has stored any diagnostic trouble codes that indicate a fault in the throttle position sensor of the throttle unit. If diagnostic trouble code ECM-9150 and/or ECM-9160 are stored, they are to be fault traced first. Otherwise, continue as follows.

Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. The values show the problem's current status and how intermittent the problem is. If the diagnostic trouble code (DTC) was stored under operating conditions that means external factors, such as low battery voltage during engine start-up, are suspected to be the cause fault-trace and remedy as necessary.

If the trouble code was stored when battery voltage was low and engine speed was close to 0 RPM when the fault occurred, it could indicate that the fault arose when the vehicle was stationary with the ignition on for a long period, thereby draining the battery, or that the fault arose due to battery voltage becoming low when the customer started the engine. This, in turn, indicates that the battery's charging status is not OK. Check the battery charge status, connections to the battery and chassis and the battery cables for contact resistance and oxidation. Remedy as necessary. Otherwise, continue as follows.

Thoroughly check the throttle for contaminants and seizing. Also check that no objects are blocking the throttle. If there is clear indication that the throttle disc has or has had contact with dirt or deposits in the throttle body, clean the throttle unit.

HINT: Small objects can cause the throttle disc to temporarily stick, which can generate this diagnostic trouble code.

Note. If the throttle is coated with an oil film, the nipple between the intake manifold and oil trap may require cleaning. Always clean the nipple if the throttle is coated with oil film.

If the trouble code recurs despite the checks/measures specified above, try replacing the throttle unit (ETM).

Other information

1. See «Identifying upgraded software ECM/ETM»(ref-430995-S36282700162012011100000)
2. See «Fault-tracing and testing the battery»(ref-430915-S36942689642011101900000)
3. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)
4. To clean the throttle unit: For -2004, see «Throttle body, cleaning»(ref-430964-S10707071812011101900000) For 2005- B5xx4T, does not apply to B5244T5, see «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000) For 2005- B5244T5, see «Throttle body (TB), cleaning (2005- B5244T5)»(ref-430995-S31105749172012011100000) .
5. See «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000)

See Faulty signal

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.

Explanation

Not all the parameters described need to be implemented in the control module. This varies from system to system.

Frozen values are parameter values that are stored when a diagnostic trouble code (DTC) is stored.

Bank 1 indicates cylinders 1-3 on 6 cylinder engines and all cylinders on 5-cylinder engines.

Bank 2 indicates cylinders 4-6 on 6-cylinder engines.

Condition, fuel trim bank X

Fuel trim can assume 5 different conditions

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 2 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 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.

Calculated load, %

Indicates the calculated engine load. The value is given as a percentage of full load.

Engine coolant temperature (ECT), °C

Indicates the engine temperature. The value is given in °C.

Engine speed, RPM

Indicates the engine speed (RPM). The value is given in RPM

Vehicle speed, km/h

Indicates the vehicle speed. The value is given in km/h.

Boost pressure

Indicates the engine volumetric efficiency. The value is given as a % compared to the atmospheric pressure (during positive boost pressure the value will be higher than 100%).

Battery voltage

Indicates the system voltage. The value is given in volts.

Throttle angle

Indicates the throttle angle. The value is given as a percentage of maximum reading.

Air mass

Indicates the mass air flow. The value is given in kg/h.

Outside temperature

Indicates the outside temperature. The value is given in °C.

Distance

Indicates the mileage when the diagnostic trouble code (DTC) was stored. The value is given in km.

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.

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.

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.

Check whether the engine control module (ECM) has stored any diagnostic trouble codes that indicate a fault in the throttle position sensor of the throttle unit. If diagnostic trouble code ECM-9150 and/or ECM-9160 are stored, they are to be fault traced first. Otherwise, continue as follows.

Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. The values show the problem's current status and how intermittent the problem is. If the diagnostic trouble code (DTC) was stored under operating conditions that means external factors, such as low battery voltage during engine start-up, are suspected to be the cause fault-trace and remedy as necessary.

If the trouble code was stored when battery voltage was low and engine speed was close to 0 RPM when the fault occurred, it could indicate that the fault arose when the vehicle was stationary with the ignition on for a long period, thereby draining the battery, or that the fault arose due to battery voltage becoming low when the customer started the engine. This, in turn, indicates that the battery's charging status is not OK. Check the battery charge status, connections to the battery and chassis and the battery cables for contact resistance and oxidation. Remedy as necessary. Otherwise, continue as follows.

For markets where upgraded software, released during year 2006 or later, is available, the solution may be to download the upgraded software. This is because the upgraded software allows a greater range for the throttle position sensor values while at the same time requiring that both throttle position sensors' values lie outside of this range for the diagnostic trouble code to be generated.

If the trouble code recurs despite the checks/measures specified above, try replacing the throttle unit (ETM).

Other information

1. See «Identifying upgraded software ECM/ETM»(ref-430995-S36282700162012011100000)
2. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)
3. See «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000)

See Faulty signal

See Faulty signal

See Faulty signal

See Faulty signal

For normally aspirated engines

If ECM-130A is stored together with ECM-91CF, ECM-130A must be fault-traced and remedied first. This is because ECM-91CF is incorrectly stored when ECM-130A, Permanent fault is stored, at the same time as cruise control is activated. This can be solved by fault-tracing and remedying ECM-130A. Otherwise, continue as follows.

For turbo engines

If ECM-91CF is stored but not ECM-130A, the solution for the markets where upgraded software, released during 2006 or later, is available, can be to download the upgraded software. Modifications have been made in the upgraded software, that do not place great demands on the Electronic throttle module (ETM) and Engine control module (ECM) reacting at precisely the same time, several seconds can now pass until the diagnostic trouble code (DTC) is stored. In other words, if cruise control is activated using the upgraded software, and then the brakes are applied, the Electronic throttle module (ETM) permits up to 2 seconds to pass before the Engine control module (ECM) signals that cruise control is no longer active. The diagnostic trouble code (DTC) is stored after 0.5 seconds in earlier software. Otherwise, continue as follows.

If there is another diagnostic trouble code (DTC) in the Engine control module (ECM) that indicates a brake fault, ECM-9400 and/or ECM-914F, this/these must be fault-traced first. Otherwise, continue as follows.

Check, using VIDA vehicle communication, that the Engine control module (ECM) receives the correct information about the status of the stop lamp switch and brake pedal position sensor. If the parameter for the brake light switch indicates the wrong status, check the signal cable between the brake light switch and the engine control module (ECM) for open circuit.

Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. The values show the problem's current status and how intermittent the problem is. If the counters show that the problem has occurred frequently in recent time, it is highly likely that the problem can be recreated during troubleshooting. If the counters show that the problem is extremely intermittent, it is not very likely that the problem can be recreated during troubleshooting.

Remedy as necessary.

Other information

1. See «Identifying upgraded software ECM/ETM»(ref-430995-S36282700162012011100000)
2. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)

Diagnostic trouble code (DTC) ECM-91DF is stored of the Electronic throttle module (ETM) receives information from the stop lamp switch that indicates that the brake pedal has been depressed, but the Engine control module (ECM) transmits information that the brake pedal has been released. The information that the Engine control module (ECM) transmits, based on the signal from the stop lamp switch. The diagnostic trouble code (DTC) can be stored alone, but it is more common that it has been stored due to no CAN communication with the Engine control module (ECM).

If one or several of the diagnostic trouble codes (DTCs) ECM-901A, ECM-902A, ECM-902B, ECM-911A, ECM-912A, ECM-E000 and/or ECM-E003 are stored at the same time as ECM-91DF, continue fault-tracing according to one of these diagnostic trouble codes (DTCs). If there is another diagnostic trouble code (DTC) in the Engine control module (ECM) that indicates a brake fault, ECM-9400 and/or ECM-914F, this/these must be fault-traced first. Otherwise, continue as follows.

Check, using VIDA vehicle communication, that the Engine control module (ECM) receives the correct information about the status of the stop lamp switch. If the parameter indicates the wrong status, check the signal cable between the brake light switch and the engine control module (ECM) for open circuit, short circuit to ground and short circuit to supply voltage.

Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. The values show the problem's current status and how intermittent the problem is. If the counters show that the problem has occurred frequently in recent time, it is highly likely that the problem can be recreated during troubleshooting. If the counters show that the problem is extremely intermittent, it is not very likely that the problem can be recreated during troubleshooting.

For markets where upgraded software, released during year 2006 or later, is available, the solution may be to download the upgraded software. As the detection time has increased from 0.3 to 5 seconds, the upgraded software becomes more tolerant towards short intermittent interferences, delays in communication between other CAN connected control modules etc. among other things.

Remedy as necessary.

Other information

1. See «Identifying upgraded software ECM/ETM»(ref-430995-S36282700162012011100000)
2. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)

1. Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
2. Then turn on the ignition and turn it off again.
3. Wait another three minutes, but if the electric cooling fan is running you have to wait another two minutes after the cooling fan has stopped, to ensure that Electronic throttle module (ETM) is shut off correctly.

If this is not done correctly, diagnostic trouble codes may remain even after deletion of diagnostic trouble codes as well as any reconfiguration, despite the problem being fixed.

Scheme 815

Checking the power supply and ground terminals

Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. The values show the problem's current status and how intermittent the problem is.

Driving conditions may be, e. g., if the engine was running, what speed the vehicle had/or if it was only Electronic throttle module (ETM) that experienced the low battery voltage.

Example of conclusions one can draw from information based on counters and frozen values

1. The diagnostic trouble code indicates that Electronic throttle module (ETM) has detected that the battery voltage was low, but it is unclear how Engine control module (ECM) has detected the battery voltage. The battery voltage accounted for in the frozen values is the voltage feed to Engine control module (ECM) and not Electronic throttle module (ETM). If the voltage feed to Engine control module (ECM) is low, this indicates that one should look for a problem that may affect both Engine control module (ECM) and Electronic throttle module (ETM) or may affect other control modules in the vehicle. If the battery voltage is OK in the frozen values, this indicates that the problem cause is isolated to the parts of the voltage feed or grounding point that only affects Electronic throttle module (ETM). Check that the connector connections for Electronic throttle module (ETM) are OK and that there is voltage and ground connection for Electronic throttle module (ETM).
2. If the counters shows that there has been a single occurrence of the problem before the last 25 driving cycles , or if the problem was generated when the engine speed was 0 RPM and battery voltage to Engine control module (ECM) was 8.9 V, then the vehicle may have stood with the ignition on for a longer time and the battery has been discharged. In this case, check that the battery and its charging status is OK.
3. If the battery voltage has been low or high in both Engine control module (ECM) and Electronic throttle module (ETM), when the engine has been running, this may indicate damaged charging regulator or alternator. At too high battery voltage, it may be an external start aid with too high voltage that has been connected to the vehicle.

For markets where the upgraded software, released during 2006 or later, is available, the solution may be to load the upgraded software for the times when the customer has stood with the ignition on and drained the battery or if anyone has connected a starting aid, which have given too high voltage for a short time. Since the upgraded software requires that the engine is running and that the battery voltage is incorrect for more than 30 seconds, then it will prevent the diagnostic trouble code from being generated in these cases.

Remedy as necessary.

Other information

1. See «Identifying upgraded software ECM/ETM»(ref-430995-S36282700162012011100000)
2. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)

1. Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
2. Then turn on the ignition and turn it off again.
3. Wait another three minutes, but if the electric cooling fan is running you have to wait another two minutes after the cooling fan has stopped, to ensure that Electronic throttle module (ETM) is shut off correctly.

If this is not done correctly, diagnostic trouble codes may remain even after deletion of diagnostic trouble codes as well as any reconfiguration, despite the problem being fixed.

Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. The values show the problem's current status and how intermittent the problem is.

Check if the diagnostic trouble code has been generated during engine start and if the battery voltage was very low at that time. If this is the case, this may indicate a poorly charged battery, corroded connections or poor battery cables.

1. Check that the connector connections for Electronic throttle module (ETM) are OK and that there is voltage and ground connection for Electronic throttle module (ETM). At ignition on, a beeping sound shall be heard from the throttle module for a short time, when it is supplied with voltage.
2. Check that the battery voltage in the vehicle is normal and that the battery's charging status is OK. Also check that the battery cables and their connections to the vehicle are in good condition as well as that connections to the battery are installed correctly and not corroded.
3. For markets where upgraded software, released during year 2006 or later, is available, the solution may be to download the upgraded software. Since detection time is increased from 0.13 to 10 seconds, the upgraded software is much more tolerant against brief intermittent interference.

Erase the diagnostic trouble codes (DTCs). If the problem still can be recreated, despite above actions, try with a new throttle module unit.

Other information

1. See «Identifying upgraded software ECM/ETM»(ref-430995-S36282700162012011100000)
2. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)
3. See «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000)

1. Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
2. Switch on the ignition again.
3. Wait another three minutes, but if the electric cooling fan is running you have to wait another two minutes after the cooling fan has stopped, to ensure that Electronic throttle module (ETM) is shut off correctly.

If this is not done correctly, diagnostic trouble codes may remain even after deletion of diagnostic trouble codes as well as any reconfiguration, despite the problem being fixed.

Removing

Disconnect the negative battery lead. Battery, disconnecting

Remove the dipstick tube.

Removing the throttle body

Scheme 816

Slacken off the hose clip for the charge air pipe on the throttle body.

Detach the charge air pipe from the throttle body.

Scheme 817

Remove

1. the intake manifold between the front and the air cleaner (ACL) housing
2. the 4 x screws holding the engine cooling fan (FC) shroud.

Push the shroud slightly to one side, pull up the relay holder and pull the connectors for the engine cooling fan (FC) apart.

Remove

1. the charge air hose from the charge air cooler
2. hoses and cables from their holders
3. the engine cooling fan relays, x 2, from the fan shroud by bending the relays into the engine compartment and pulling upwards.

Open the tie strap for the cables.

Remove

1. the connectors with holders on both sides of the fan shroud
2. the evaporative emission system (EVAP) valve from the engine cooling fan (FC) shroud
3. the fan with shroud.

Scheme 818

If the electrical cable to the throttle body is behind the bracket for the starter motor

Undo the 2 x nuts.

Remove the screw.

Remove any tie straps and disconnect the connector for the throttle body.

Route the cable for the throttle body from the rear side of the bracket for the starter motor.

Scheme 819

Remove the 4 x screws for the throttle body.

Installing

Note. For tightening torques, see: Tightening torque

Installing the throttle body

Install

1. the new throttle body with a new gasket
2. the screws, 4 x to contact.

Position the cable for the throttle body behind the bracket for the starter motor.

Install the screw in the cylinder block.

Tighten the nuts x 2 and the screw.

Install the connector and tie strap.

Note. If the cable was not behind the bracket for the starter motor the cable must be connected along the cable duct using two tie straps.

Raise the car.

Remove the splashguard under the engine

Tighten the 4 x screws for the throttle body.

Lower the car.

Install

1. the fan shroud with the screws, x 4
2. the holder for the connector before the lower screw on the fan shroud (vehicle's) left hand side. Tighten the lower screws. Thread the 2 x upper screws
3. the fan connectors
4. the engine cooling fan relays in the holder
5. the evaporative emission system (EVAP) valve to the engine cooling fan shroud
6. the connector and holder on the right hand side of the engine cooling fan shroud
7. the tie strap around the cables
8. the hoses and cables in their clips/holders
9. the charge air hose for the charge air cooler
10. the relay holder, tighten the upper screws.

Installing the charge air pipe

Install the charge air pipe on the throttle body.

Tighten the hose clip for the charge air pipe on the throttle body.

Install

1. the dipstick tube
2. the intake manifold between the front and the air cleaner housing.

Turn the ignition key to position 2.

Connect the negative battery lead. Battery, disconnecting

Ordering and downloading software

Note. After reprogramming the ETM the ECM must also be upgraded.

Order the software for ETM reprogramming and program the new control module according to the table below

Order the software for ECM gasoline upgrading and program the control module according to the table below.

Finishing

Carry out a function check.

Set the clock.

See Fault-tracing information

See Faulty signal

See Signal too high

See Signal too low

See Faulty signal

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. Reinstall the connectors, components etc.
3. Start the engine
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-430995-S31233130162011101900000)

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: Faults which caused this diagnostic trouble code (DTC) may affect the adaptation values for the throttle unit. Carry out adaptation of the throttle unit to update the adaptation values.

Note. The ignition must be switched on for at least 30 seconds after the basic conditions are met in order for the adaptation to start. It takes approximately 10 seconds to run the adaptation.

1. Ignition off
2. Reinstall the components and connectors etc.
3. Ignition on
4. Read off the parameters. Check that the following basic conditions for adaptation of the throttle unit are met. Ignition on / engine off Battery voltage above 10 V Accelerator pedal (AP) unaffected The vehicle must be stationary (no vehicle speed signal) Engine coolant temperature (ECT) between 5-100°C Intake air temperature (IAT) above 5 °C. Remedy as necessary. Check that the adaptation is correctly run after the "Adaptation of the throttle unit running" parameter changes status from "YES" to "NO". When all basic conditions are met, the adaptation must be completed after approximately 40 seconds. When the adaptation has been run correctly, the following information will be displayed: Adaptation of the throttle unit: OK Adaptation of the throttle unit running: NO.

1. Continue Refer to «Checking the function»(ref-430995-S11875761822011101900000)

Checking the function

1. Ignition on. 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 whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". HINT: In some cases several functions of the component will be diagnosed. The affects the amount of time taken to run the diagnostic. The fault is permanent if the fault status is "Fault found". If the fault status is "No fault found" the fault is intermittent and not presently active.

1. Continue Refer to «Replacing the throttle unit»(ref-430995-S10162089972011101900000)

Replacing the throttle unit

1. Ignition off.
2. To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) .

1. Continue Refer to «Verification»(ref-430995-S30195665482011101900000)

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 parameters. Check that the following basic conditions for adaptation of the throttle unit are met. Ignition on / engine off Battery voltage above 10 V Accelerator pedal (AP) unaffected The vehicle must be stationary (no vehicle speed signal) Engine coolant temperature (ECT) between 5-100°C Intake air temperature (IAT) above 5 °C. Remedy as necessary. Check that the adaptation is correctly run after the "Adaptation of the throttle unit running" parameter changes status from "YES" to "NO". When all basic conditions are met, the adaptation must be completed after approximately 40 seconds. When the adaptation has been run correctly, the following information will be displayed: Adaptation of the throttle unit: OK Adaptation of the throttle unit running: NO.

1. Continue Refer to «Verification, continued»(ref-430995-S21963021602011101900000)

Verification, continued

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

1. Ignition on. 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-430995-S17679371522011101900000)

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 if other control modules have diagnostic trouble codes (DTCs) for control area network (CAN) faults. If so, perform all troubleshooting according to these diagnostic trouble codes first. Otherwise, continue as follows.

ECM-928C is stored if the engine control module (ECM) does not receive steering wheel module (SWM) information on the cruise control buttons via the CAN network. The diagnostic trouble code is also generated if the information received by the engine control module (ECM) does not match that sent by the steering wheel module (SWM).

1. Using VIDA vehicle communication, check that the parameters "Cruise control resume", "Cruise control SET-" and "Cruise control SET+" indicate the correct values. If the buttons work and the information can be read out in the engine control module (ECM), the fault is intermittent. Otherwise the fault is permanent.

Permanent fault

Check whether the steering wheel module (SWM) has stored any diagnostic trouble codes that indicate a fault in the cruise control buttons. Any diagnostic trouble codes that are stored should be fault traced first.

Check whether any other control modules have stored diagnostic trouble codes that indicate that the steering wheel module (SWM) was not transmitting on the CAN network. Any diagnostic trouble codes that are stored should be fault traced first.

Intermittent fault

Check whether the steering wheel module (SWM) has stored any diagnostic trouble codes that indicate a fault in the cruise control buttons. Any diagnostic trouble codes that are stored should be fault traced first.

Check whether any other control modules have stored diagnostic trouble codes that indicate that the steering wheel module (SWM) was not transmitting on the CAN network. Any diagnostic trouble codes that are stored should be fault traced first.

Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. The values show the problem's current status and how intermittent the problem is. If the trouble code was stored when battery voltage was low and engine speed was close to 0 RPM when the fault occurred, it could indicate that the fault arose when the vehicle was stationary with the ignition on for a long period, thereby draining the battery, or that the fault arose due to battery voltage becoming low when the customer started the engine. At start, battery voltage may be low if the battery has been poorly charged. Check the speed at which the vehicle was travelling when the trouble code was stored as cruise control can only be activated at speeds above 30 km/h (18.6 mph).

For markets where the upgraded software, released during 2006 or later, is available, the solution may be to load the upgraded software. If the frozen values indicate that the diagnostic trouble code was generated due to low battery voltage during or just after engine start, new software is the solution. This is because the new software requires vehicle speed to be greater than 25 km/h (15 mph) for the test to be active.

If upgraded software is not available and the frozen values indicate that the fault occurred when battery voltage was low and engine speed was close to 0 RPM, fault tracing should focus on checking the vehicle's power supply, especially battery charge status.

HINT: Using VIDA vehicle communication, check that the parameters "Cruise control resume", "Cruise control SET-" and "Cruise control SET+" indicate the correct values. To aid fault tracing, use Component specifications when measuring and checking relevant components and use Wiring diagram, Signal description and Breakout box to measure and control signals to and front the control module or its components.

Remedy as necessary.

Other information

1. See «Identifying upgraded software ECM/ETM»(ref-430995-S36282700162012011100000)
2. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)

See Fault-tracing information

See Fault-tracing information

See Fault-tracing information

See Fault-tracing information

See Fault-tracing information

See Fault-tracing information

See Fault-tracing information

1. 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. Check whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". HINT: In some cases several functions of the component will be diagnosed. The affects the amount of time taken to run the diagnostic. The fault is permanent if the fault status is "Fault found". If the fault status is "No fault found" the fault is intermittent and not presently active.

1. Continue Refer to «Checking components and wiring»(ref-430995-S32304732662011101900000)

HINT: This diagnostic trouble code (DTC) may be caused by faulty software.

1. Ignition off. Try downloading new software to the engine control module (ECM). To download new software, see: «Engine control module (ECM), replacing»(ref-430961-S10976842282011101900000) Remedy as necessary.

1. Continue Refer to «Adaptation of the throttle unit»(ref-430995-S00226318172011101900000)

Note. The ignition must be switched on for at least 30 seconds after the basic conditions are met in order for the adaptation to start. It takes approximately 10 seconds to run the adaptation.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on
4. Read off the parameters. Check that the following basic conditions for adaptation of the throttle unit are met. Ignition on / engine off Battery voltage above 10 V Accelerator pedal (AP) unaffected The vehicle must be stationary (no vehicle speed signal) Engine coolant temperature (ECT) between 5-100°C Intake air temperature (IAT) above 5 °C. Remedy as necessary. Check that the adaptation is correctly run after the "Adaptation of the throttle unit running" parameter changes status from "YES" to "NO". When all basic conditions are met, the adaptation must be completed after approximately 40 seconds. When the adaptation has been run correctly, the following information will be displayed: Adaptation of the throttle unit: OK Adaptation of the throttle unit running: NO.

1. Continue Refer to «Verification»(ref-430995-S04472010472011101900000)

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. 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-430995-S39346320362011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

1. Start the engine. 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 whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". HINT: In some cases several functions of the component will be diagnosed. The affects the amount of time taken to run the diagnostic. The fault is permanent if the fault status is "Fault found". If the fault status is "No fault found" the fault is intermittent and not presently active.

1. Continue Refer to «Checking components and wiring»(ref-430995-S10564920632011101900000)

HINT: This diagnostic trouble code (DTC) may be caused by faulty software.

1. Ignition off. Try downloading new software to the engine control module (ECM). To download new software, see: «Engine control module (ECM), replacing»(ref-430961-S10976842282011101900000) Remedy as necessary.

1. Continue Refer to «Adaptation of the throttle unit»(ref-430995-S08235926812011101900000)

Note. The ignition must be switched on for at least 30 seconds after the basic conditions are met in order for the adaptation to start. It takes approximately 10 seconds to run the adaptation.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on
4. Read off the parameters. Check that the following basic conditions for adaptation of the throttle unit are met. Ignition on / engine off Battery voltage above 10 V Accelerator pedal (AP) unaffected The vehicle must be stationary (no vehicle speed signal) Engine coolant temperature (ECT) between 5-100°C Intake air temperature (IAT) above 5 °C. Remedy as necessary. Check that the adaptation is correctly run after the "Adaptation of the throttle unit running" parameter changes status from "YES" to "NO". When all basic conditions are met, the adaptation must be completed after approximately 40 seconds. When the adaptation has been run correctly, the following information will be displayed: Adaptation of the throttle unit: OK Adaptation of the throttle unit running: NO.

1. Continue Refer to «Verification»(ref-430995-S37454229072011101900000)

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. 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-430995-S16203269702011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

1. Start the engine. 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 whether the fault is permanent or intermittent. Read off the diagnostic trouble code (DTC) fault status when the diagnostic status is "Completed". HINT: In some cases several functions of the component will be diagnosed. The affects the amount of time taken to run the diagnostic. The fault is permanent if the fault status is "Fault found". If the fault status is "No fault found" the fault is intermittent and not presently active.

1. Continue Refer to «Checking components and wiring»(ref-430995-S13958134972011101900000)

HINT: This diagnostic trouble code (DTC) may be caused by faulty software.

1. Ignition off. Try downloading new software to the engine control module (ECM). To download new software, see: «Engine control module (ECM), replacing»(ref-430961-S10976842282011101900000) Remedy as necessary.

1. Continue Refer to «Adaptation of the throttle unit»(ref-430995-S05221524552011101900000)

Note. The ignition must be switched on for at least 30 seconds after the basic conditions are met in order for the adaptation to start. It takes approximately 10 seconds to run the adaptation.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on
4. Read off the parameters. Check that the following basic conditions for adaptation of the throttle unit are met. Ignition on / engine off Battery voltage above 10 V Accelerator pedal (AP) unaffected The vehicle must be stationary (no vehicle speed signal) Engine coolant temperature (ECT) between 5-100°C Intake air temperature (IAT) above 5 °C. Remedy as necessary. Check that the adaptation is correctly run after the "Adaptation of the throttle unit running" parameter changes status from "YES" to "NO". When all basic conditions are met, the adaptation must be completed after approximately 40 seconds. When the adaptation has been run correctly, the following information will be displayed: Adaptation of the throttle unit: OK Adaptation of the throttle unit running: NO.

1. Continue Refer to «Verification»(ref-430995-S11388712262011101900000)

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. 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-430995-S24214386382011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

See Faulty signal

Checking the status

Note. The ignition must be switched on for at least 30 seconds after the basic conditions are met in order for the adaptation to start. It takes approximately 10 seconds to run the adaptation.

1. Ignition off
2. Ignition on
3. Read off the parameters. Check that the following basic conditions for adaptation of the throttle unit are met. Ignition on / engine off Battery voltage above 10 V Accelerator pedal (AP) unaffected The vehicle must be stationary (no vehicle speed signal) Engine coolant temperature (ECT) between 5-100°C Intake air temperature (IAT) above 5 °C. Remedy as necessary. Check that the adaptation is correctly run after the "Adaptation of the throttle unit running" parameter changes status from "YES" to "NO". When all basic conditions are met, the adaptation must be completed after approximately 40 seconds. When the adaptation has been run correctly, the following information will be displayed: Adaptation of the throttle unit: OK Adaptation of the throttle unit running: NO. The fault is intermittent at the moment if the adaptation has been completed correctly.

1. Continue Refer to «Checking connectors and components»(ref-430995-S21402937312011101900000)

Checking connectors and components

1. Ignition off. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the resistance values of the potentiometers in the throttle unit. Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary. Remedy as necessary. Other information: For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) . To clean the throttle unit: For -2004, see «Throttle body, cleaning»(ref-430964-S10707071812011101900000) For 2005- B5xx4T, does not apply to B5244T5, see «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000) For 2005- B5244T5, see «Throttle body (TB), cleaning (2005- B5244T5)»(ref-430995-S31105749172012011100000) . See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430995-S21762359082011101900000)

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

Note. The ignition must be switched on for at least 30 seconds after the basic conditions are met in order for the adaptation to start. It takes approximately 10 seconds to run the adaptation.

1. Ignition off
2. Reinstall the connectors, components etc.
3. Ignition on
4. Read off the parameters. Check that the following basic conditions for adaptation of the throttle unit are met. Ignition on / engine off Battery voltage above 10 V Accelerator pedal (AP) unaffected The car must be stationary (no vehicle speed signal) Engine coolant temperature (ECT) between 5-100 °C Intake air temperature (IAT) above 5 °C. Remedy as necessary. Check that the adaptation is correctly run after the "Adaptation of the throttle unit running" parameter changes status from "YES" to "NO". When all basic conditions are met, the adaptation must be completed after approximately 40 seconds. When the adaptation is completed correctly, the following information will be displayed: Adaptation of the throttle unit: OK Adaptation of the throttle unit running: NO. The fault has been remedied if the adaptation has been completed correctly.

Is the adaptation OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430995-S21140628902011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Signal too high / Signal too low

See Signal too high / Signal too low

See Faulty signal

Internal fault

See Internal fault

Signal too high/signal too low Permanent fault

Check the cable between engine control module (ECM) terminal #B15 and clutch pedal position sensor terminal #2 for open circuit, short circuit to supply voltage or short circuit to ground depending on the type of fault detected. Check the ground cable between engine control module (ECM) terminal #B4 and clutch pedal position sensor terminal #4 for open circuit, short circuit to supply voltage or short circuit to ground depending on the type of fault detected. Check the resistance between clutch pedal position sensor terminals #2 and #4. Fault trace and remedy as necessary.

Signal too high/signal too low Intermittent fault

Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. The values show the problem's current status and how intermittent the problem is. The operating conditions can be, for example, whether the engine was running, what the speed of the vehicle was and what the battery voltage in the system was. This information can facilitate searching for an intermittent fault. If the fault was stored at a battery voltage lower than 10 V with engine speed at 0 RPM, this indicates that the fault may have occurred when the engine was started. This, in turn, indicates that the battery's charging status is not OK.

1. Check the battery status.

Faulty signal Permanent or intermittent.

For markets where the upgraded software, released during 2006 or later, is available, the solution may be to load the upgraded software. It is no longer necessary to store a diagnostic trouble code for this type of fault. Thus, this fault type has been disabled in the upgraded software. For other markets, check the clutch pedal position sensor's installation, cables and connectors for contact resistance and oxidation. Check that the clutch pedal position sensor has the right resistance.

HINT: Using VIDA vehicle communication, check that the parameter "Clutch pedal position" indicates correct values. There are other parameters that can be of help when fault tracing and verifying this diagnostic trouble code. To aid fault tracing, use Component specifications when measuring and checking relevant components and use Wiring diagram, Signal description and Breakout box to measure and control signals to and front the control module or its components.

For markets where the upgraded software, released during 2006 or later, is available, the solution may be to load the upgraded software. Since detection time has been increased from 0.16 to 5 seconds, the upgraded software will be much more tolerant to short, intermittent disruptions.

Remedy as necessary.

Other information

1. For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
2. See «Identifying upgraded software ECM/ETM»(ref-430995-S36282700162012011100000)
3. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)

1. Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
2. Then turn on the ignition and turn it off again.
3. Wait another three minutes. If the electric cooling fan is running, you have to wait another two minutes after the electric cooling fan has stopped, to make sure that Electronic throttle module (ETM) has been shut off correctly.

If this is not done correctly, diagnostic trouble codes may remain even after deleting diagnostic trouble codes and any reconfiguration may remain, despite the problem being fixed.

Scheme 820

Scheme 821

See Faulty signal

See Faulty signal

See Faulty signal

1. Ignition on
2. Read off the clutch pedal movement by carefully pressing and releasing the clutch pedal. Check that the value changes with clutch pedal movement. The value must be between 60-70 % when the clutch pedal is unaffected and 10-20 % when the pedal is fully depressed. The fault is intermittent at the moment if the values are OK.

1. Continue Refer to «Checking components and wiring»(ref-430995-S32867614742011101900000)

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 clutch pedal movement by carefully pressing and releasing the clutch pedal. Check that the value changes with clutch pedal movement. The value must be between 60-70 % when the clutch pedal is unaffected and 10-20% when the pedal is fully depressed. The fault has been remedied if the values are OK.

Are these values OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430995-S23084093352011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

See Faulty signal

See Faulty signal

See Faulty signal

1. Ignition on
2. Read off the clutch pedal movement by carefully pressing and releasing the clutch pedal. Check that the value changes with clutch pedal movement. The value must be between 60-70% when the clutch pedal is unaffected and 10-20% when the pedal is fully depressed. The fault is intermittent at the moment if the values are OK.

1. Continue Refer to «Checking components and wiring»(ref-430995-S33800248272011101900000)

Pedal position sensor clutch, replacing

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

Scheme 822

1. Ignition off
2. Remove the soundproofing panel. See «Soundproofing panel, replacing»(ref-431073-S00873319512011101900000)
3. Remove the two ball connectors from the master cylinder and the arm
4. Disconnect the connector.

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 clutch pedal movement by carefully pressing and releasing the clutch pedal. Check that the value changes with clutch pedal movement. The value must be between 60-70 % when the clutch pedal is unaffected and 10-20% when the pedal is fully depressed. The fault has been remedied if the values are OK.

Are these values OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430995-S39351524292011101900000)

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

1. Ignition on
2. Read off the clutch pedal movement by carefully pressing and releasing the clutch pedal. Check that the value changes with clutch pedal movement. The value must be between 60-70 % when the clutch pedal is unaffected and 10-20 % when the pedal is fully depressed. The fault is intermittent at the moment if the values are OK.

1. Continue Refer to «Checking components and wiring»(ref-430995-S16129419952011101900000)

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 clutch pedal movement by carefully pressing and releasing the clutch pedal. Check that the value changes with clutch pedal movement. The value must be between 60-70 % when the clutch pedal is unaffected and 10-20% when the pedal is fully depressed. The fault has been remedied if the values are OK.

Are these values OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430995-S25658815302011101900000)

The fault should have been detected and remedied. As this is not the case fault-tracing has failed.

Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

See Signal too low

See Fault-tracing information

See Fault-tracing information

See Fault-tracing information

See Fault-tracing information

1. Ignition on
2. Read off the movement of the accelerator pedal by carefully depressing and releasing the accelerator pedal (AP). Check that the value changes with accelerator pedal movement. The value must be approximately 0.4 V when the accelerator pedal (AP) is unaffected and approximately 4 V when the accelerator pedal (AP) is fully depressed. The fault is intermittent at the moment if the values are OK.

1. Continue Refer to «Checking the power supply»(ref-430995-S17267598902011101900000)

Scheme 823

1. Ignition on. Check the connectors and terminals for water penetration. Check the power supply (12 V) to the accelerator pedal (AP) position sensor between accelerator pedal (AP) position sensor terminals #1 (wiring side) and #3 (wiring side). Check that the power supply is approximately 12 V with the ignition on. Remedy as necessary. Other information: See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . To access and replace the accelerator pedal (AP) position sensor, see «Accelerator pedal (AP), replacing»(ref-431199-S21892486792011101900000) .

Is the power supply OK?

1. YES Refer to «Replacing the accelerator pedal»(ref-430995-S05384404782011101900000)
2. NO Refer to «Checking the connectors and cables»(ref-430995-S23918351702011101900000)

Replacing the accelerator pedal

1. Ignition off. Try a new accelerator pedal (AP) position sensor if no fault is found and the fault is permanent. See «Accelerator pedal (AP), replacing»(ref-431199-S21892486792011101900000) .

1. Continue Refer to «Verification»(ref-430995-S05854760722011101900000)

Checking the connectors and cables

1. Ignition off
2. Check the accelerator pedal (AP) position sensor connector. Check for contact resistance and oxidation. Check the power supply cable (12 V) between accelerator pedal (AP) position sensor terminal #1 (wiring side) and the relevant fuse for the circuit. Check for a short-circuit to ground. Check for an open-circuit. Check that the fuse for the circuit has not blown. Check the ground lead for power supply (12 V) between accelerator pedal (AP) position sensor terminal #3 (wiring side) and the relevant ground terminal. Check for contact resistance and oxidation. Check for an open-circuit. HINT: With the ignition on, the power supply to the accelerator pedal (AP) position sensor must be approximately 12 V measured between accelerator pedal (AP) position sensor terminals #1 (wiring side) and #3 (wiring side). HINT: With the ignition on, the power supply from the engine control module (ECM) must be approximately 5 V measured between accelerator pedal (AP) position sensor terminals #6 (wiring side) and #4 (wiring side). Remedy as necessary. Other information: See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) For further information about the fuses and relays, see the appropriate Wiring Diagram To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . To access and replace the accelerator pedal (AP) position sensor, see «Accelerator pedal (AP), replacing»(ref-431199-S21892486792011101900000) .

1. Continue Refer to «Replacing the accelerator pedal»(ref-430995-S05384404782011101900000)

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 movement of the accelerator pedal by carefully depressing and releasing the accelerator pedal (AP). Check that the value changes with accelerator pedal movement. The value must be approximately 0.4 V when the accelerator pedal (AP) is unaffected and approximately 4 V when the accelerator pedal (AP) is fully depressed. The fault has been remedied if the values are OK.

Are these values OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430995-S36273518362011101900000)

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 Permanent fault

Depending on the type of fault the detected diagnostic trouble code indicates, check the signal cable between engine control module (ECM) terminal #B16 and brake pedal position sensor terminal #1 for open circuit, short circuit to supply voltage or short circuit to ground.

Check the ground cable between engine control module (ECM) terminal #B4 and brake pedal position sensor terminal #2 for open circuit, short circuit to supply voltage or short circuit to ground depending on the type of fault detected.

Check the brake pedal sensor resistance between #1 and #2, for 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 turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) .
4. For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) .
5. For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000)

Signal too high/signal too low Intermittent fault

Use the diagnostic trouble codes' frozen values as well as the counters, to determine the driving conditions when the problem was detected the first time and how often the problem has occurred. The values show the problem's current status and how intermittent the problem is. This information can facilitate searching for an intermittent fault.

If for example the trouble code was stored when battery voltage was low and engine speed was equal to 0 RPM, it could indicate that the fault arose when the vehicle was stationary with the ignition on for a long period, thereby draining the battery, or that the fault arose when the customer was attempting to start the vehicle.

For markets where the upgraded software, released during 2006 or later, is available, the solution may be to load the upgraded software. Since detection time has been increased from 0.16 to 2 seconds, the upgraded software will be more tolerant to short, intermittent disruptions.

HINT: Using VIDA vehicle communication, check that the parameters "Brake pedal position, volts" and "Brake light switch" indicate correct values. To aid fault tracing, use Component specifications when measuring and checking relevant components and use Wiring diagram, Signal description and Breakout box to measure and control signals to and front the control module or its components.

Remedy as necessary.

Other information

1. To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) .
2. With the ignition on and brake pedal sensor connector disconnected, the voltage between clutch pedal position sensor #1 and ground should be approximately 5 V.
3. When the clutch pedal position sensor connector is disconnected, the brake pedal sensor #4 should be connected to ground.
4. For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
5. For the resistance values, see «Brake pedal sensor resistance values»(ref-430995-S37010309442012011200000) .
6. See «Identifying upgraded software ECM/ETM»(ref-430995-S36282700162012011100000)
7. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)

1. Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
2. Then turn on the ignition and turn it off again.
3. Wait another three minutes, but if the electric cooling fan is running you have to wait another two minutes after the cooling fan has stopped, to ensure that Electronic throttle module (ETM) is shut off correctly.

If this is not done correctly, diagnostic trouble codes may remain even after deleting diagnostic trouble codes and any reconfiguration may remain, despite the problem being fixed.

Scheme 824

Brake pedal sensor resistance values

Brake pedal sensor

See Fault-tracing information

See Fault-tracing information

See Fault-tracing information

Pedal sensor power brake booster, replacing

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.

Preparatory work

Ignition off.

Press the brake pedal a few times until the pedal becomes stiff and rises slightly. This releases the vacuum in the brake servo and thus prevents the O-ring from being sucked in when the pedal position sensor is removed.

Scheme 825

Slacken off the snap ring around the mounting on the sensor slightly. Insert a narrow screwdriver or wedge. Press one end of the snap ring in approximately 10 mm. Press radially backwards in the groove in the snap ring.

Pull out the sensor slightly and disconnect the connector. Remove the sensor and the O-ring.

Faulty signal. Permanent fault

See Faulty signal. Permanent fault

Signal missing Permanent or intermittent fault.

Using VIDA vehicle communication, check the function of the brake light switch by reading off the parameters "Brake light switch" and "Brake pedal position". When the brake pedal is depressed, the parameter "Brake light switch" should indicate that the switch is activated when the parameter "Brake pedal position" is greater than 23.8% (1.2 V).

Diagnostic trouble code ECM-9400 will be stored in the engine control module (ECM) if the brake light switch has not closed when the brake pedal is depressed and brake pedal position is less than 23.8% (1.2 V) for longer than 0.16 seconds.

If the brake light switch and brake pedal position sensor appear to be working properly, but the brake light switch closes at the wrong time, check the attachment of the brake light switch and the brake pedal position sensor and check that the pedal assembly seems OK.

If the brake light switch does not close when the brake pedal is depressed, check the brake light switch's cables, connectors and voltage supply (battery voltage) to brake light switch terminal #1.

When the brake pedal is depressed (switch closed), brake light switch terminal #2 and engine control module (ECM) terminal #B26 should have battery voltage.

Remedy as necessary.

If diagnostic trouble code ECM-9400, No signal, Intermittent fault, is stored but no fault is found, the solution could be to download the upgraded software (only for markets where upgraded software (released 2006 or later) is available). Since detection time has been increased from 0.16 to 2 seconds and the fault must be repeated during 30 consecutive brakings, the upgraded software will be much more tolerant to short, intermittent disruptions.

Note. The upgraded software has adjusted limits for the fault type No signal. The diagnostic trouble code is stored if the brake light switch is not closed when the brake pedal is depressed, brake pedal position is less than 53.9% (2.7 V) for longer than 2 seconds and this is repeated for 30 consecutive brakings.

The diagnostic trouble code can also be stored if the brake light switch is closed when the brake pedal is released. For this test an adapted brake pedal position sensor value is used, that is, the control module adapts the signal so that it always shows 0 % (0 V) at released pedal, which is different from other tests where the direct signal from the sensor is used. This parameter is not accessible in VIDA. By checking what the parameter "Brake pedal position" indicates when the pedal is released and then subtracting the value from the value indicated when the brake light switch is closed, one can estimate the size of the adapted value.

For example, if "Brake pedal position, volts" is 3.10 V when the pedal is released and 2.91 V when the brake light switch closes, the adapted value is 0.19 V (3.10-2.91) when the brake light switch closes. The diagnostic trouble code will be stored if the brake light switch is closed when the adapted value is less than 2.7% (0.14 V) for longer than 2 seconds and this is repeated for 30 consecutive brakings.

HINT: Using VIDA vehicle communication, check that the parameters "Brake pedal position, volts" and "Brake light switch" indicate correct values. To aid fault tracing, use Component specifications when measuring and checking relevant components and use Wiring diagram, Signal description and Breakout box to measure and control signals to and front the control module or its components.

Remedy as necessary

Other information

1. To connect the breakout box / access the control module, see «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. For the resistance values, see «Brake pedal sensor resistance values»(ref-430995-S37010309442012011200000) .
4. See «Identifying upgraded software ECM/ETM»(ref-430995-S36282700162012011100000)
5. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)

1. Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
2. Then turn on the ignition and turn it off again.
3. Wait another three minutes, but if the electric cooling fan is running you have to wait another two minutes after the cooling fan has stopped, to ensure that Electronic throttle module (ETM) is shut off correctly.

If this is not done correctly, diagnostic trouble codes may remain even after deleting diagnostic trouble codes and any reconfiguration may remain, despite the problem being fixed.

Scheme 826

Scheme 827

See Fault-tracing information

1. Ignition on
2. Read off the status from the brake light switch. Check the function of the brake light switch by slowly pressing down and letting up the brake pedal. Check that the status changes between "OFF" when brake pedal is not pressed and "ON" when brake pedal is pressed. If the status from the brake light switch changes according to the above when pressing on the brake pedal, this indicates that the malfunction is intermittent at this time.

1. Continue Refer to «Checking voltage feed»(ref-430995-S32593450542011101900000)

Scheme 828

1. Ignition on Check voltage feed to the brake light switch. Measure between the brake light switch #1 (against cable harness) and ground (frame grounding point). Voltage feed shall be approx. 12 V. If voltage feed is missing: Check the circuit for voltage feed to the brake light switch #1 (against cable harness) for open circuit, short-circuit to ground and damaged fuse for the circuit. Remedy as necessary. Other information: See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) . For information about the fuses and relays, see the appropriate Wiring Diagram. To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) . For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . To access/replace brake light switch, see «Stop lamp switch, replacing»(ref-431049-S12057655552011101900000) .

1. Continue Refer to «Checking components and wiring»(ref-430995-S09487665162011101900000)

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 status from the stop lamp switch. Check the function of the stop lamp switch by carefully pressing and releasing the brake pedal. Check that the status changes between "OFF" when the brake pedal is unaffected and "ON" when the brake pedal is depressed. If the status of the stop lamp switch changes as described above when the brake pedal is depressed, the fault has been remedied.

Is the function OK?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-430995-S42654124112011101900000)

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.

Incorrect signal

See Incorrect signal

See Fault-tracing information

See Fault-tracing information

See Fault-tracing information

See Fault-tracing information