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Contents

Wiring diagrams Section: Testing & Diagnostics

Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 1 of 14 (Convertible): Diagnosis
Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 1 of 14 (Convertible): Wiring
Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 1 of 14 (Convertible): Other

Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 2 of 14 (Convertible): Diagnosis
Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 2 of 14 (Convertible): Removal & Installation
Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 2 of 14 (Convertible): Wiring
Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 2 of 14 (Convertible): Other

Engine Control Module (ECM) DTC Index - B5234T3 (Convertible)

Engine Control Module (ECM) DTC Index - B5244T (Convertible)

Engine Control Module (ECM) Diagnostic Trouble Code (DTC) Index - (B5234T3) (Coupe)

Engine Control Module (ECM) Diagnostic Trouble Code (DTC) Index - B5244T (Coupe)

All sections

Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 6 of 7 (Coupe): Other Volvo C70 I

Testing & Diagnostics 19 illustrations ~15287 words

Fault-tracing information

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

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

Signal missing. Intermittent fault

See Signal missing. Intermittent fault

Verification

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

Scheme 1021

Scheme 1021: Verification

Scheme 1022

Ignition off
Reinstall the connectors, components etc.
Start the engine and let it run at idle speed
Activate the malfunction indicator lamp (MIL)
Check that the function is OK.

Is function OK?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-408515-S29220443582011071200000)

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 missing. Permanent fault

See Signal missing. Permanent fault

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

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

Signal too high. Intermittent fault

See Signal too high. Intermittent fault

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

Ignition off
Reinstall the connectors, components etc.
Start the engine and let it run at idle speed
Activate the malfunction indicator lamp (MIL)
Check that the function is OK.

Is function OK?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-408515-S11712344312011071200000)

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

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

Signal too high. Permanent fault

See Signal too high. Permanent fault

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

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

Signal too low. Intermittent fault

See Signal too low. Intermittent fault

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

Ignition off
Reinstall the connectors, components etc.
Start the engine and let it run at idle speed
Activate the malfunction indicator lamp (MIL)
Check that the function is OK.

Is function OK?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-408515-S08386268872011071200000)

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

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

Signal too low. Permanent fault

See Signal too low. Permanent fault

See Fault-tracing information

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

Continue Refer to «Information»(ref-408515-S29350191492011071200000)

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

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

Scheme 1023

Scheme 1023: Replacing control module

Ignition off. The control module has registered an internal fault. Try a new control module according to «Replacing the engine control module (ECM)»(ref-408506-S21950528412011071200000) . NOTE: When replacing a control module the new software must be programmed into the control module.

Continue Refer to «Information»(ref-408515-S13094930252011071200000)

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

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

Signal too high/signal too low. Intermittent fault

See Signal too high/signal too low. Intermittent fault

Signal too high/signal too low. Permanent fault

See Signal too high/signal too low. Permanent fault

See Signal too high/signal too low. Intermittent fault

See Signal too high/signal too low. Permanent fault

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

Continue Refer to «Information»(ref-408515-S11291702762011071200000)

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

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

See Signal too high/signal too low. Intermittent fault

See Signal too high/signal too low. Permanent fault

Checking the components and wires

The engine control module has detected a fault in the communication between the immobilizer and the engine control module on an earlier occasion.

Visually check the immobilizer connections and connector as described in Inspect terminals visually

Check the signal wire between engine control module B22 (B32) and immobilizer B5 (A35) for an intermittent open circuit as described in Open-circuit, intermittent faults , for an intermittent short circuit to ground as described in Short-circuit to ground, intermittent faults , and for an intermittent short circuit to voltage supply as described in Short-circuit to supply voltage, intermittent faults .

Do the necessary corrective action.

Additional information

to access/replace the immobilizer, see «Replacing immobilizer control module»(ref-408456-S31140454572011071200000) .
To access/replace the engine control module, see «Replacing the engine control module (ECM)»(ref-408506-S21950528412011071200000) .
For information on signals, see «Signal specification»(ref-408451-S42269556162011071200000) .
For immobilizer signal description see «Immobilizer signal specification»(ref-408459-S11111353652011071200000) .

Scheme 1024

Continue Refer to «Information»(ref-408515-S22398766862011071200000)

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

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

Signal faulty. Intermittent fault

See Signal faulty. Intermittent fault

Checking the signal wire

Visually check the immobilizer connectors as described in Check terminals visually

Check the signal wire between engine control module B22 (B32) and immobilizer B5 (A35) for an open circuit as described in Open-circuit, permanent faults , for a short circuit to ground as described in Short-circuit to ground, permanent faults , and for a short circuit to voltage supply as described in Short-circuit to supply voltage. Permanent faults .

Do the necessary corrective action.

Then try to start the vehicle.

Additional information

to access/replace the immobilizer, see «Replacing immobilizer control module»(ref-408456-S31140454572011071200000) .
To access/replace the engine control module, see «Replacing the engine control module (ECM)»(ref-408506-S21950528412011071200000) .
For information on signals, see «Signal specification»(ref-408451-S42269556162011071200000) .
For immobilizer signal description see «Immobilizer signal specification»(ref-408459-S11111353652011071200000) .

Did the vehicle start?

YES OKAY: Troubleshooting has been completed.
NO Refer to «Checking the components and programming»(ref-408515-S26273256932011071200000)

Checking the components and programming

If the checking of wiring and connections did not lead to the fault being remedied, the cause may be that the VIN numbers in the immobilizer and engine control module (ECM) do not correspond. This occurs when one of these has been reused from another vehicle. Replace with a new, unused unit.

Another reason can be that the immobilizer has been programmed with the incorrect engine type at installation.

The immobilizer or engine control module (ECM) may be damaged.

Remedy as necessary.

Additional information

to access/replace the immobilizer, see «Replacing immobilizer control module»(ref-408456-S31140454572011071200000) .
To access/replace the engine control module, see «Replacing the engine control module (ECM)»(ref-408506-S21950528412011071200000) .
For information on signals, see «Signal specification»(ref-408451-S42269556162011071200000) .
For immobilizer signal description see «Immobilizer signal specification»(ref-408459-S11111353652011071200000) .

Signal faulty. Permanent fault

See Signal faulty. Permanent fault

Faulty signal. Intermittent fault

See Faulty signal. Intermittent fault

Checking the cable

Check the cable between system relay terminal #3 and control module terminal #A70 (#B10). Check for an open-circuit. Check for a short-circuit to ground. See Contents .

Try a new system relay if no fault is found during the above fault-tracing.

Remedy as necessary.

Continue Refer to «Verification»(ref-408515-S24209099342011071200000)

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

Ignition off
Reinstall connectors, components etc.
Start the engine.

Does the engine start?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-408515-S35476239722011071200000)

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

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

Faulty signal. Permanent fault

See Faulty signal. Permanent fault

Replacing the charging regulator

Try a new charging regulator.

Was a fault detected?

YES OKAY: Troubleshooting has been completed.
NO FAULT TRACING FAILED: The fault should have been detected and remedied. As this is not the case fault-tracing has failed. Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

See Signal too high. Intermittent fault

Checking boost pressure

Check boost pressure according to Fault-tracing and testing the voltage supply system .

Was a fault detected?

YES OKAY: Troubleshooting has been completed.
NO FAULT TRACING FAILED: The fault should have been detected and remedied. As this is not the case fault-tracing has failed. Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

See Signal too high. Permanent fault

Fault-tracing the charging system

Check the cable between system relay terminal 3 and control module terminal A70 (#B10) for contact resistance and oxidation according to Contact resistance and oxidation .

Other information

To fault-trace the charging system, see «Fault-tracing and testing the voltage supply system»(ref-408452-S22139239362011071200000) .

Scheme 1025

Was a fault detected?

YES OKAY: Troubleshooting has been completed.
NO FAULT TRACING FAILED: The fault should have been detected and remedied. As this is not the case fault-tracing has failed. Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

See Signal too low. Intermittent fault

Check the battery voltage

Check the generator (GEN) charging voltage

Check the cable between system relay terminal 3 and control module terminal A70 (#B10) for contact resistance and oxidation according to Contact resistance and oxidation .

Other information

To fault-trace the charging system see «Fault-tracing and testing the voltage supply system»(ref-408452-S22139239362011071200000) .

Was a fault detected?

YES OKAY: Troubleshooting has been completed.
NO FAULT TRACING FAILED: The fault should have been detected and remedied. As this is not the case fault-tracing has failed. Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

See Signal too low. Permanent fault

Checking cables

Check the power supply cable between the control module #A39 (#A39) and mass air flow (MAF) sensor #4 for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Check the power supply cable between the control module #A39 (#A39) and boost pressure sensor #1 for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Check power supply cable between control module #A39 (#A39) and air conditioning (A/C) pressure sensor #3 for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Check power cable between control module #B10 (#B20) and fuel tank pressure sensor connector #3 for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

HINT: Read off 5 volt power supply by clicking on the VCT2000 symbol.

Remedy as necessary.

Other information

To connect the breakout box, see «Connecting the breakout box»(ref-408435-S12899753102011071200000) .
For information about signals, see «Signal specification»(ref-408451-S42269556162011071200000) .
To access/replace the mass air flow (MAF) sensor, see «Mass air flow sensor (MAF), replacing»(ref-408434-S31668912732011071200000) .
To access/replace the boost pressure sensor, see «Manifold absolute pressure (MAP) sensor, replacing»(ref-408507-S11632055412011071200000) .

Scheme 1026

Continue Refer to «Information»(ref-408515-S31953948492011071200000)

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

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

See Signal too high. Intermittent fault

Check the power supply cable between the control module #A39 (#A39) and mass air flow (MAF) sensor #4 for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Check power supply cable between control module #A39 (#A39) and boost pressure sensor #1 for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Check power supply cable between control module #A39 (#A39) and air conditioning (A/C) pressure sensor #3 for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Check power cable between control module #B10 (#B20) and fuel tank pressure sensor connector #3 for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

HINT: Read off 5 volt power supply by clicking on the VCT2000 symbol.

Remedy as necessary.

Other information

To connect the breakout box, see «Connecting the breakout box»(ref-408435-S12899753102011071200000) .
For information about signals, see «Signal specification»(ref-408451-S42269556162011071200000) .
To access/replace the mass air flow (MAF) sensor, see «Mass air flow sensor (MAF), replacing»(ref-408434-S31668912732011071200000) .
To access/replace the boost pressure sensor, see «Manifold absolute pressure (MAP) sensor, replacing»(ref-408507-S11632055412011071200000) .

Continue Refer to «Verification»(ref-408515-S14430066052011071200000)

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

Ignition on.
Read off the 5 volt supply. The value must be 5 V.

Is the value OK?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-408515-S23909221852011071200000)

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

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

See Signal too high. Permanent fault

Check the power supply cable between the control module #A39 (#A39) and mass air flow (MAF) sensor #4 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Check the power supply cable between the control module #A39 (#A39) and boost pressure sensor #1 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Check power supply cable between control module #A39 (#A39) and air conditioning (A/C) pressure sensor #3 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Check power cable between control module #B10 (#B20) and fuel tank pressure sensor connector #3 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

HINT: Read off 5 volt power supply by clicking on the VCT2000 symbol.

Remedy as necessary.

Other information

To connect the breakout box, see «Connecting the breakout box»(ref-408435-S12899753102011071200000) .
For information about signals, see «Signal specification»(ref-408451-S42269556162011071200000) .
To access/replace the mass air flow (MAF) sensor, see «Mass air flow sensor (MAF), replacing»(ref-408434-S31668912732011071200000) .
To access/replace the boost pressure sensor, see «Manifold absolute pressure (MAP) sensor, replacing»(ref-408507-S11632055412011071200000) .

Continue Refer to «Information»(ref-408515-S00706005102011071200000)

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

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

See Signal too low. Intermittent fault

Check the power supply cable between the control module #A39 (#A39) and mass air flow (MAF) sensor #4 for a short-circuit to ground according to Short-circuit to ground, permanent faults .

Check power supply cable between control module #A39 (#A39) and boost pressure sensor #1 for a short-circuit to ground according to Short-circuit to ground, permanent faults .

Check power supply cable between control module #A39 (#A39) and air conditioning (A/C) pressure sensor #3 for a short-circuit to ground according to Short-circuit to ground, permanent faults .

Check power cable between control module #B10 (#B20) and fuel tank pressure sensor connector #3 for a short-circuit to ground according to Short-circuit to ground, permanent faults .

HINT: Read off 5 volt power supply by clicking on the VCT2000 symbol.

Remedy as necessary.

Other information

To connect the breakout box, see «Connecting the breakout box»(ref-408435-S12899753102011071200000) .
For information about signals, see «Signal specification»(ref-408451-S42269556162011071200000) .
To access/replace the mass air flow (MAF) sensor, see «Mass air flow sensor (MAF), replacing»(ref-408434-S31668912732011071200000) .
To access/replace the boost pressure sensor, see «Manifold absolute pressure (MAP) sensor, replacing»(ref-408507-S11632055412011071200000) .

Continue Refer to «Verification»(ref-408515-S21970279042011071200000)

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

Ignition on.
Read off the 5 volt supply. The value must be 5 V.

Is the value OK?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-408515-S25509570902011071200000)

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

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

See Signal too low. Permanent fault

Checking a short-circuit in CAN cables

Connect an ohmmeter between the relevant CAN cable (CAN-L and CAN-H) and the power supply, and between the CAN cable and ground. Twist the connectors and turn the cable harness to different positions at each reading to determine any intermittent short-circuits.

Take the following readings

The resistance between CAN-L and ground
The resistance between CAN-L and voltage
The resistance between CAN-H and ground
The resistance between CAN-H and voltage.

The resistance must be infinite or very high in all cases (greater than 1 Mohms).

HINT: The reading can be taken from the same connector if the CAN cables, power supply and ground are exposed. If possible, take readings on the rear of the connector to prevent damage to the terminals in the connector. If this is not possible, use the adapter wiring or loose terminal pins to obtain a good contact.

Was a fault detected?

YES Refer to «Identifying fault causes in the CAN network»(ref-408515-S16123734672011071200000)
NO Refer to «Checking the traffic load on the CAN cables»(ref-408515-S01801580502011071200000)

Checking the traffic load on the CAN cables

Connect the battery
Ignition on Also read: «Battery, disconnecting»(ref-438953-S33389199492011120700000) Faults in the CAN network may be due to a control module sending faulty messages that disrupt "normal" communication. When messages are sent incorrectly, this results in a considerable increase in the amount of traffic on the CAN network. Check the load by measuring the average voltage value on the CAN cables in relation to ground. Connect a voltmeter between CAN-L and ground. The voltage must be approximately 2.3 V. Then connect a voltmeter between CAN-H and ground. The voltage must be approximately 2.8 V. HINT: If possible measure from the rear of the affected connectors so that they are not damaged.

Is the value OK?

YES Refer to «Information»(ref-408515-S40151818362011071200000)
NO Refer to «Identifying a control module in the CAN network»(ref-408515-S03930376162011071200000)

Identifying fault causes in the CAN network

Disconnect a control module that disconnects the CAN network (a control module that has four terminals to the CAN network). HINT: For the low speed network, suitable places for disconnecting the network are at the steering wheel module (SWM), the driver information module (DIM) or the climate control module (CCM). In the event of a short-circuit between one of the CAN cables and voltage or ground, the fault can be located by disconnecting a control module that disconnects the CAN network. Readings can then be taken to determine on which side of the disconnected control module the fault is located. Connect an ohmmeter between the CAN cable and supply voltage or ground. Take readings at both ends of the CAN network where the network is disconnected. Twist and bend the cable harness to locate any intermittent short-circuits. The resistance must be infinite or very high (greater than 1Mohms). If a fault can be localized in one direction, disconnect the network at a point further down on the CAN network in the direction in which the fault was discovered and repeat the reading. In this way, try to identify where in the network the fault might be located. HINT: A short-circuit between the CAN cables and supply voltage or ground may be in either the wiring or in a control module. Rectify the wiring as necessary. Replace the control module if the fault has been localized to a control module.

Continue Refer to «Verification»(ref-408515-S35723472442011071200000)

Identifying a control module in the CAN network

Connect the battery Also read: «Battery, disconnecting»(ref-438953-S33389199492011120700000)
Ignition on If the load on the CAN network is too high, this may be due to a control module sending faulty messages on the CAN network (known as a disruptive control module). The fault may also be due to an intermittent short-circuit to supply voltage or ground in one of the CAN cables. This results in the control modules on the CAN network starting to send faulty messages. The faults can occur without a diagnostic trouble code (DTC) being stored by the control modules. The voltage can be measured between the CAN cables in order to check the load on the CAN network. Connect a voltmeter between the CAN cables. If the communication on the network is correct, the average voltage value should be approximately 0.5 V (0.4 V to 0.6 V). If there is a fault in the communication, the voltage reading will be approximately 0.7 V or higher. In order to identify from which control module the faulty communication is being transmitted, cut the supply voltage to one control module at a time and check the voltage in the CAN cables again. The easiest way to cut the supply voltage is to remove a fuse. Repeat until the voltage between the CAN cables drops to approximately 0.5 V. HINT: When the probable faulty control module has been identified, connect and disconnect the supply voltage to the control module a number of times to verify that the fault appears and disappears. NOTE: Do not cut the power to the central electronic module (CEM) unless it is the last control module left to check. The control module that is communicating incorrectly must be replaced. Remedy as necessary. NOTE: Following a fault involving "disruptive" control modules, other modules may remain in "Limp-Home mode" even after switching the ignition off and on a number of times. To remedy this, disconnect and reconnect the battery negative terminal to restore the control modules to normal function.

Continue Refer to «Verification»(ref-408515-S35723472442011071200000)

Disconnect a control module that disconnects the CAN network (a control module that has four terminals to the CAN network). HINT: For the low speed network, suitable places for disconnecting the network are at the steering wheel module (SWM), the driver information module (DIM) or the climate control module (CCM). In the event of an open-circuit or a short-circuit between the CAN cables, the fault can be localized by disconnecting a control module that disconnects the CAN network. Readings can then be taken to determine on which side of the disconnected control module the fault is located. Connect an ohmmeter between the CAN cables. Take readings at both ends of the CAN network where the network is disconnected. Twist and bend the cable harness to locate any intermittent short-circuits. The resistance must be 120 ohm. If a fault can be localized in one direction, disconnect the network at a point further down on the CAN network in the direction in which the fault was discovered and repeat the reading. In this way, try to identify where in the network the fault might be located. Remedy the cables as necessary.

Continue Refer to «Verification»(ref-408515-S35723472442011071200000)

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

Reinstall the connectors, components, etc.
Ignition on
Erase diagnostic trouble codes by clicking the VCT2000 symbol
Start the car. Allow the car to run for 10 minutes.
Read off diagnostic trouble codes (DTCs). Check if a diagnostic trouble codes (DTCs) for communication fault recurs in the central electronic module (CEM).

Does the diagnostic trouble code (DTC) recur?

YES Refer to «Information»(ref-408515-S17248957412011071200000)
NO OKAY: Troubleshooting has been completed.

Verification shows that the fault is no longer present. The diagnostic trouble code (DTC) was probably caused by an intermittent fault.

Fault-tracing for this diagnostic trouble code (DTC) is not followed by a verification.

You can view the information again or exit fault-tracing for this diagnostic trouble code (DTC).

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.

Too-high: signal/signal missing/too low signal.

See Too high signal/signal missing/too low signal.

Replacing engine control module (ECM) and programming

Engine control module (ECM) has registered an internal fault.

CAUTION

A new engine control module (ECM) is delivered without software. For the engine control module (ECM) to function after replacement the engine control module (ECM) must be programmed.

For information about programming and replacing the engine control module (ECM), see Replacing the engine control module (ECM) .

Continue Refer to «Information»(ref-408515-S01069521372011071200000)

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

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

Engine control module (ECM) registered a fault previously but has detected that the fault is no longer present.

Continue Refer to «Information»(ref-408515-S15870094012011071200000)

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

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

See Faulty signal. Permanent fault

See Faulty signal. Intermittent fault

See Faulty signal. Permanent fault

See Faulty signal. Intermittent fault

See Too high signal/signal missing/too low signal.

See Fault-tracing information

Signal missing

Signal missing. Signal too low.

As described in the diagnostic trouble code information, the engine control module (ECM) checks that the actual throttle angle matches the desired angle. If the throttle angle does not match, diagnostic trouble code ECM-903F is stored. The diagnostic trouble code is pretty much always stored as the result of another trouble code in the engine control module (ECM). Check whether the engine control module (ECM) has stored any other diagnostic trouble codes that indicate that the electronic throttle module (ETM) has had trouble fulfilling the desired throttle angle.

If other diagnostic trouble codes have been stored that indicate a communication fault on the CAN network, it indicates that ECM-903F may have been stored due to improper functioning of the CAN network.

If ECM-901A, ECM-902A, ECM-902B, ECM-911A, ECM-912A and/or ECM-E000 are stored, fault trace these diagnostic trouble codes.

If other diagnostic trouble codes have been stored that indicate a problem with the throttle unit or its throttle regulation, it indicates that the throttle unit may have had trouble fulfilling the desired throttle angle. Any diagnostic trouble codes that are stored should be fault traced first. If ECM-914F, ECM-9150, ECM-9160, ECM-9190, ECM-91A7 and/or ECM-91B7 are stored, these diagnostic trouble codes are to be fault traced first.

If other diagnostic trouble codes have been stored that indicate a dirty throttle unit, this indicates that the throttle unit may have had trouble fulfilling the desired throttle angle. Any diagnostic trouble codes that are stored should be fault traced first. If ECM-130A is stored, fault trace this diagnostic trouble code.

If ECM-903F is stored alone without any of the above diagnostic trouble codes, use the trouble code's frozen values plus the counter to determine the operating conditions when the fault was first detected and how often the fault 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.

The solution to the problem may be to download the upgraded software. Adjustments that have been made in the upgraded software make the system more tolerant to brief and intermittent disruptions, which previously generated diagnostic trouble code ECM-903F.

See Identifying upgraded software ECM/ETM

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

Signal too high

Check whether the engine control module (ECM) has stored any other diagnostic trouble codes that indicate a problem with the electronic throttle module performing its work cycles. Fault trace these diagnostic trouble codes.

The solution to the problem may be to download the upgraded software. The detection time in the upgraded software has been increased from 0.4 to 2.6 seconds, which makes it more tolerant to brief, intermittent disruptions.

Remedy as necessary.

Other information

See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Information about combined diagnostic trouble codes (DTCs)»(ref-438954-S03262982102011120700000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)
See «Fault-tracing and testing the battery»(ref-408452-S15583142572011071200000)
See «Throttle body (electronic throttle module (ETM)), replacing»(ref-408503-S29799791482011071200000)

CAUTION

In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed: Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM). Then turn on the ignition and turn it off again. 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.

Continue Refer to «Information»(ref-408515-S25785131912011071200000)

Signal missing. Signal too low.

Check whether the engine control module (ECM) has stored any other diagnostic trouble codes that indicate that the electronic throttle module (ETM) has had trouble fulfilling the desired throttle angle. If other diagnostic trouble codes have been stored that indicate a communication fault on the CAN network, it indicates that ECM-903F may have been stored due to improper functioning of the CAN network. If ECM-901A, ECM-902A, and/or ECM-E000 are stored, fault trace these diagnostic trouble codes.

Check whether the engine control module (ECM) has stored any other diagnostic trouble codes that indicate that the electronic throttle module (ETM) has had trouble regulating the throttle and fault trace these trouble codes. If ECM-914F, ECM-9150, ECM-9160, ECM-9190, ECM-91A7 and/or ECM-91B7 are stored, these diagnostic trouble codes are to be fault traced first.

If ECM-903F is stored alone without any of the above diagnostic trouble codes, try replacing the throttle unit.

Signal too high.

Check that Engine control module (ECM) and Electronic throttle module (ETM) are updated with the latest software.

Other information

See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Information about combined diagnostic trouble codes (DTCs)»(ref-438954-S03262982102011120700000)
See «Throttle body (electronic throttle module (ETM)), replacing»(ref-408503-S29799791482011071200000)

CAUTION

In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed: Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM). Then turn on the ignition and turn it off again. 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 deletion of diagnostic trouble codes as well as any reconfiguration, despite the problem being fixed.

Continue Refer to «Information»(ref-408515-S25785131912011071200000)

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

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

Signal too low or signal missing

See Signal too low or signal missing

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

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

The fault tracing that follows depends on whether the software in the control module is upgraded. The control module's software version can be read out using VIDA vehicle communication.

Ignition on.
Read out the control module's software.

Select one of the following options

The software is not upgraded. Refer to «Signal missing»(ref-408515-S01824130752011071200000)
The software is upgraded. Refer to «Fault-tracing information»(ref-408515-S40551535852011071200000)

Signal missing. Signal too low.

If ECM-901A, ECM-902A, ECM-902B, ECM-911A, ECM-912A and/or ECM-E000 are stored, fault trace these diagnostic trouble codes.

See Identifying upgraded software ECM/ETM

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

Signal too high

Remedy as necessary.

Other information

See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Information about combined diagnostic trouble codes (DTCs)»(ref-438954-S03262982102011120700000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)
See «Fault-tracing and testing the battery»(ref-408452-S15583142572011071200000)
See «Throttle body (electronic throttle module (ETM)), replacing»(ref-408503-S29799791482011071200000)

CAUTION

Continue Refer to «Information»(ref-408515-S34933317182011071200000)

Signal missing. Signal too low.

If ECM-903F is stored alone without any of the above diagnostic trouble codes, try replacing the throttle unit.

Signal too high.

Check that Engine control module (ECM) and Electronic throttle module (ETM) are updated with the latest software.

Other information

See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Information about combined diagnostic trouble codes (DTCs)»(ref-438954-S03262982102011120700000)
See «Throttle body (electronic throttle module (ETM)), replacing»(ref-408503-S29799791482011071200000)

CAUTION

In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed: Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM). Then turn on the ignition and turn it off again. 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 deletion of diagnostic trouble codes as well as any reconfiguration, despite the problem being fixed.

Continue Refer to «Information»(ref-408515-S34933317182011071200000)

See Faulty signal. Permanent fault

Information

The diagnostic trouble code (DTC) is an information trouble code and never occurs alone. Therefore fault-trace for another diagnostic trouble code (DTC).

See Fault-tracing information

The throttle unit has previously registered a fault, but has detected that the fault no longer exists.

Continue Refer to «Information»(ref-408515-S05398299342011071200000)

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

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

Replacing throttle unit and programming

The throttle unit has registered an internal fault. Registration has occurred in the engine control module (ECM).

CAUTION

A new throttle unit is delivered without software. For the throttle unit to function after replacement, the throttle unit must be programmed.

For information about programming and replacing the throttle unit, see Replacing the throttle body (electronic throttle module) .

Continue Refer to «Information»(ref-408515-S07474927602011071200000)

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

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

See Faulty signal. Intermittent fault

See Faulty signal. Permanent fault

See Faulty signal. Intermittent fault

See Faulty signal. Permanent fault

See Too high signal/signal missing/too low signal.

Checking components

If one or several of the diagnostic trouble codes (DTCs), ECM-900E, ECM-901A, ECM-901E, ECM-902A, ECM-902B, ECM-910E, ECM-911A, ECM-912A, ECM-E000 and/or ECM-E003 are stored together with ECM-913F, continue fault-tracing according to one of these diagnostic trouble codes (DTCs). Otherwise, continue as follows.

Check, using the identification of the upgraded software Engine control module (ECM)/Electronic throttle module (ETM) that the correct software is in the Electronic throttle module (ETM) and the Engine control module (ECM). The diagnostic trouble code (DTC) is stored if software that is not compatible is mixed. This can, for example, occur if the software in the Electronic throttle module (ETM) is older than the upgraded software in the Engine control module (ECM) or if a throttle unit, which is designed for a 5-cylinder turbocharged engine, is installed on a 5-cylinder non-turbocharged engine.

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 no external factors are suspected and if the fault is permanent, i.e. the fault has been detected several times, try a new Engine control module (ECM).

Remedy as necessary.

Other information

See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)
See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)

CAUTION

In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed

Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
Then turn on the ignition and turn it off again.
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.

Continue Refer to «Information»(ref-408515-S37215497492011071200000)

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

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

Non-plausible: request

See Non plausible request

Checking the throttle position sensor

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.

Download the upgraded software. This software contains several improvements geared toward the throttle unit's throttle position sensor, including improvement of the tolerances for short-term, intermittent disruptions to the throttle position sensor signals. The greatest improvement is that the software can handle a substantially greater difference between throttle position sensors' signals than the previous software.

Perform test of throttle module's damper position sensor. Click on the VCT2000 symbol to start the test. NOTE: Certain types of malfunctions of the electronic throttle module (ETM), related to the two internal throttle position sensors, may be temperature-dependent. To be sure of the result, the test should be repeated a number of times in the temperature range between cold engine (ambient temperature) and warm engine (warm engine compartment, engine and induction system).

If the test indicates that the throttle position sensors are not OK, try a new throttle unit (ETM).

Other information

See «Throttle body (electronic throttle module (ETM)), replacing»(ref-408503-S15001656662011071200000)
See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)

CAUTION

In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed

Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
Then turn on the ignition and turn it off again.
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.

Continue Refer to «Information»(ref-408515-S16189619772011071200000)

For upgraded software, released during year 2006 or later, this diagnostic trouble code is used as an information diagnostic trouble code. It will be stored in case the replacement value throttle shut off is or has been activated. It is always stored as the result of another trouble code, troubleshooting is not required.

CAUTION

There are individual cases when diagnostic trouble code (DTC) ECM-914F can be the only code stored in the Engine control module (ECM). If the upgraded software, released in 2006 or later, is downloaded and only diagnostic trouble code (DTC) ECM-914F is stored in the Engine control module (ECM), try replacing the throttle unit.

Other information

See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Throttle body (electronic throttle module (ETM)), replacing»(ref-408503-S15001656662011071200000)

CAUTION

In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed: Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM). Then turn on the ignition and turn it off again. 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 deletion of diagnostic trouble codes as well as any reconfiguration, despite the problem being fixed.

Continue Refer to «Information»(ref-408515-S16189619772011071200000)

The fault tracing that follows depends on whether the software in the control module is upgraded. The control module's software version can be read out using VIDA vehicle communication.

Ignition on.
Read out the control module's software.

Select one of the following options

The software is not upgraded. Refer to «Checking the throttle position sensor»(ref-408515-S21601845942011071200000)
The software is upgraded. Refer to «Fault-tracing information»(ref-408515-S27058002162011071200000)

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

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

See Fault-tracing information

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

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

Faulty signal

See Faulty signal

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

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

See Faulty signal

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.

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 0.4 to 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

See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)

CAUTION

In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed

Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
Then turn on the ignition and turn it off again.
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.

Continue Refer to «Information»(ref-408515-S30505341682011071200000)

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

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

See Faulty signal

Checking components and connections

5-cyl. non-turbo engines

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

Turbo engines and 6-cyl non-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.

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.

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.

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

See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)

CAUTION

In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed

Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
Then turn on the ignition and turn it off again.
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.

Continue Refer to «Information»(ref-408515-S37412037762011071200000)

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

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

See Faulty signal

Checking the throttle unit

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

See «Throttle body (electronic throttle module (ETM)), replacing»(ref-408503-S29799791482011071200000)
See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)

CAUTION

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.

Continue Refer to «Information»(ref-408515-S08765655542011071200000)

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

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

Throttle body (electronic throttle module (ETM)), replacing

For B5xx4T -2002, see «Replacing the throttle body (electronic throttle module)»(ref-408507-S24385244412011071200000) .
For B5xx4T 2003-2004, see «Throttle body (electronic throttle module), replacing»(ref-408503-S04510209802011071200000) .
For B5xx4T 2005-, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-408503-S36421532952011071200000) .

See Frozen values and counter for diagnostic trouble codes.

DONE See «Checking the throttle unit»(ref-439006-S14622942162011120700000)

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

See «Throttle body (electronic throttle module (ETM)), replacing»(ref-408503-S15001656662011071200000)
See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)

CAUTION

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.

Continue See «Fault-tracing information»(ref-439006-S08532434602011120700000)

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

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

FAULT FOUND OKAY: Troubleshooting has been completed.

See Faulty signal

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, first clean the throttle unit and then download the upgraded software. Otherwise, download the upgraded software directly.

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.

Perform test of throttle module's damper position sensor. Click on the VCT2000 symbol to start the test.

If the test indicates that the throttle position sensors are not OK, try a new throttle unit (ETM).

CAUTION

Certain types of malfunctions of the electronic throttle module (ETM), related to the two internal throttle position sensors, may be temperature-dependent. To be sure of the result, the test should be repeated a number of times in the temperature range between cold engine (ambient temperature) and warm engine (warm engine compartment, engine and induction system).

Remedy as necessary.

Other information

See «Contents»(ref-438953-S34713241302011120700000)
See «Throttle body (TB), cleaning»(ref-408503-S04696046242011071200000)
See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Fault-tracing and testing the battery»(ref-408452-S15583142572011071200000)
See «Throttle body (electronic throttle module (ETM)), replacing»(ref-408503-S15001656662011071200000)

CAUTION

Continue Refer to «Information»(ref-408515-S39940508712011071200000)

The fault tracing that follows depends on whether the software in the control module is upgraded. The control module's software version can be read out using VIDA vehicle communication.

Ignition on.
Read out the control module's software.

Select one of the following options

The software is not upgraded. Refer to «Checking the throttle unit»(ref-408515-S15362275932011071200000)
The software is upgraded. Refer to «Checking the throttle unit»(ref-408515-S14053877052011071200000)

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

See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Fault-tracing and testing the battery»(ref-408452-S15583142572011071200000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)
See «Throttle body (TB), cleaning»(ref-408503-S04696046242011071200000)
See «Throttle body (electronic throttle module (ETM)), replacing»(ref-408503-S15001656662011071200000)

CAUTION

Continue Refer to «Information»(ref-408515-S39940508712011071200000)

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

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

See Fault-tracing information

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

See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)
See «Throttle body (electronic throttle module (ETM)), replacing»(ref-408503-S15001656662011071200000)

CAUTION

Continue

Continue Refer to «Information»(ref-408515-S02237124742011071200000)

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

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

See Fault-tracing information

For 5-cyl. 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 and 6-cylinder aspirated 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

See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)

Caution: In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed

Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
Then turn on the ignition and turn it off again.
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 1027

Continue Refer to «Information»(ref-408515-S36189923762011071200000)

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

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

Faulty position

See Faulty position

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

See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)

Caution: In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed

Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
Then turn on the ignition and turn it off again.
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 1028

Continue Refer to «Information»(ref-408515-S28688689512011071200000)

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

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

Level too low

See Level too low

Checking the power supply and ground terminals

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

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).
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.
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

See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)

Caution: In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed

Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
Then turn on the ignition and turn it off again.
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.

Continue Refer to «Information»(ref-408515-S33421118822011071200000)

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

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

Faulty supply voltage

See Faulty supply voltage

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.

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.
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.
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

See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)
See «Throttle body (electronic throttle module (ETM)), replacing»(ref-408503-S02541588062011071200000)
See «Replacing the throttle body (electronic throttle module)»(ref-408507-S24385244412011071200000)

Caution: In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed

Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
Switch on the ignition again.
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.

Continue Refer to «Information»(ref-408515-S02127330412011071200000)

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

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

Removing

Disconnect the negative battery lead. Battery, disconnecting

Removing the charge air pipe and charge air hose

Scheme 1029

Scheme 1029: Removing

Remove the screws for the charge air pipe above the engine from the intake manifold.

Remove

the dipstick tube
the charge air hose from the charge air cooler (CAC)
the charge air pipe from the rubber connection on the turbocharger (TC).

Remove the charge air pipe and charge air hose.

Removing the fan shroud

Scheme 1030

Remove the inlet pipe to the air cleaner (ACL) housing.

Disconnect the 2 x connectors, for the engine cooling fan (FC).

Remove

The evaporative emission system (EVAP) valve from the engine cooling fan (FC) shroud
the four tie straps that hold the cable harness secure at the fan shroud.

Note. Certain vehicles have three tie straps and a clip holding the cable harness at the fan shroud.

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

Remove both the screws holding the fan shroud

Carefully lift up the engine cooling fan (FC).

Removing the throttle body

Scheme 1031

Slacken off the hose clamp for the charge air pipe on the throttle body (TB).

Remove the charge air pipe from the throttle body.

Scheme 1032

CAUTION

The wiring to the throttle body must not be cut off. The throttle body may need to returned complete.

If the wiring to the throttle body is behind the bracket for the starter motor

Slacken off the nuts (x 2).

Remove the screw.

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

Route the wiring for the throttle body from the reverse of the bracket for the starter motor.

Removing the throttle body screws

Scheme 1033

Remove the 4 x screws for the throttle body.

Installing

Note. For tightening torques, see: Tightening torque

Installing the throttle body

Install

the new throttle body with new gasket
the 4 x screws to contact.

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

Install the screws in the cylinder block.

Tighten the 2 x nuts and the screws.

Connect the connector and install the tie strap.

Note. If the wiring was not behind the bracket for the starter motor, it must be secured along the cable duct by 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 the charge air hose to the throttle body and tighten the clamp.

Installing the fan shroud

Scheme 1034

Carefully lower the fan shroud and align with the holders. Route the cable harness behind the holder (3).

Tighten both the mounting screws

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

Secure the cable harness by the fan shroud using tie straps (1) and (2). (Scheme 1034)

Install the evaporative emission system (EVAP) valve.

Connect the engine cooling fan (FC) connectors.

Installing the charge air pipe and charge air hose

Install

charge air hose/charge air pipe between the charge air cooler and rubber connection on the turbocharger (TC)
both the screws for the charge air pipe on the intake manifold
the intake manifold to the air cleaner (ACL) housing
the intake manifold between the air cleaner (ACL) housing and the front panel.

Install

the dipstick tube
the battery negative lead. «Battery, disconnecting»(ref-438953-S33389199492011120700000)

Ordering and downloading software

Note. After reloading the electronic throttle module (ETM), the engine control module (ECM) must also be upgraded.

Order software for the electronic throttle module (ETM) reloading and program the new control module according to the chart below.

Order software for engine control module (ECM) gasoline upgrading and program the control module according to the chart below.

Finishing

Carry out a function test.

Set the clock.

Faulty current

See Faulty current

Using the parameters "Cruise control resume", "Cruise control SET-" and "Cruise control SET+" in VIDA vehicle communication, check whether the buttons work and indicate the correct values. If the buttons do not work properly, it indicates that the fault is permanent. Otherwise, it is an intermittent fault.

Signal too high. Permanent fault

Diagnostic trouble code ECM-928C, High signal, is stored if the engine control module (ECM) detects that the Cruise On and Resume buttons are active at the same time, which is infeasible due to the design of the cruise control stalk and buttons. The most likely cause is a problem with the cruise control stalk.

Remedy as necessary.

Signal too low. Permanent fault

Diagnostic trouble code ECM-928C, Low signal, is stored if the engine control module (ECM) detects that the SET- and SET+ buttons are active at the same time, which is infeasible due to the design of the cruise control stalk and buttons. The most likely cause is a problem with the cruise control stalk.

Remedy as necessary.

Signal missing. Permanent fault

Diagnostic trouble code ECM-928C, No signal, is stored if the engine control module (ECM) detects that any of the signals from the buttons are high (approx. 12 V) when the pulse should be low. Check the following cables for short circuit to supply voltage

SET+ button, between engine control module (ECM) terminal #B19 and cruise control stalk terminal #5.
SET- button, between engine control module (ECM) terminal #B34 and cruise control stalk terminal #4.
Resume button, between engine control module (ECM) terminal #B20 and cruise control stalk terminal #3.
ON/OFF button, between engine control module (ECM) terminal #B33 and cruise control stalk terminal #2.
Feed (pulsed signal) between engine control module (ECM) terminal #B47 and cruise control stalk terminal #1.

The buttons are gauged with a pulsed signal from the control module, where the signal is high (approx. 12 V) for 0.004 seconds and low (approx. 0 V) for 0.016 seconds. This means a period time of 0.020 seconds (0.004 + 0.016 = 0.020). When one of the buttons is activated, the engine control module (ECM) receives the pulsed signal on the connection that corresponds to the activated button.

Intermittent fault

Read the diagnostic trouble code information for likely causes of the fault type.

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. 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.

For markets where upgraded software, released during year 2006 or later, is available, the solution may be to download 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

See «Replacing cruise control lever/turn signal indicator switch»(ref-438949-S08065373062011120700000)
See «Signal specification»(ref-438954-S05832475042011120700000)
See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)

WARNING

In order for Electronic throttle module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed

Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
Then turn on the ignition and turn it off again.
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 1035

Scheme 1036

Continue Refer to «Information»(ref-408515-S08656668322011071200000)

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

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

Scheme 1037

Scheme 1037: Removal

Position the steering wheel straight ahead.

Key out.

Pull out steering wheel as far as possible and lower steering column.

Undo clips on panel (1).

Remove

upper steering wheel cover (2), by disconnecting it at the steering wheel, lifting it and pulling it outwards.
screws (3).
lower steering wheel cover.
cruise control/turn signal indicator switch and disconnect connector.

Scheme 1038

Scheme 1038: Installation

Note. The cruise control/turn signal switch should be in the neutral position during installation. The pin that controls automatic cancel may otherwise be broken off.

Connect 8-pin connector (2).

Install

the new cruise control/turn signal indicator switch

Connect the 6-pin connector (3) from the lever to the connector (4), on the left-hand side of the steering column.

Install

steering wheel covers and panel.

Function test the switch.

See Fault-tracing information

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.

Check the battery status.

Faulty signal. Permanent or intermittent.

For markets where upgraded software, released during year 2006 or later, is available, the solution may be to download 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 upgraded software, released during year 2006 or later, is available, the solution may be to download 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

To connect the breakout box, see «Connecting the breakout box»(ref-408435-S12899753102011071200000) .
For information about signals, see «Signal specification»(ref-408451-S42269556162011071200000) .
See «Identifying upgraded software ECM/ETM»(ref-438955-S16861622552011120700000)
See «Checking wiring and terminals»(ref-438953-S20310262912011120700000)

CAUTION

In order for Electronic Throttle Module (ETM) to reset any reconfigurations as well as delete internally stored problems, the following must be performed

Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic Throttle Module (ETM).
Then turn on the ignition and turn it off again.
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 1039

Continue Refer to «Information»(ref-408515-S41255302622011102600000)

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

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

Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 6 of 7 (Coupe): Other Volvo C70 I

Fault-tracing information

Signal missing. Intermittent fault

Verification

Scheme 1021

Scheme 1022

Signal missing. Permanent fault

Signal too high. Intermittent fault

Signal too high. Permanent fault

Signal too low. Intermittent fault

Signal too low. Permanent fault

Scheme 1023

Signal too high/signal too low. Intermittent fault

Signal too high/signal too low. Permanent fault

Checking the components and wires

Scheme 1024

Signal faulty. Intermittent fault

Checking the signal wire

Checking the components and programming

Signal faulty. Permanent fault

Faulty signal. Intermittent fault

Checking the cable

Faulty signal. Permanent fault

Replacing the charging regulator

Checking boost pressure

Fault-tracing the charging system

Scheme 1025

Checking cables

Scheme 1026

Checking a short-circuit in CAN cables

Checking the traffic load on the CAN cables

Identifying fault causes in the CAN network

Identifying a control module in the CAN network

Too-high: signal/signal missing/too low signal.

Replacing engine control module (ECM) and programming

Signal missing

Signal too low or signal missing

Information

Replacing throttle unit and programming

Checking components

Non-plausible: request

Checking the throttle position sensor

Faulty signal

Checking components and connections

Checking the throttle unit

Throttle body (electronic throttle module (ETM)), replacing

Scheme 1027

Faulty position

Scheme 1028

Level too low

Checking the power supply and ground terminals

Faulty supply voltage

Removing

Scheme 1029

Scheme 1030

Scheme 1031

Scheme 1032

Scheme 1033

Installing

Scheme 1034

Faulty current

Scheme 1035

Scheme 1036

Scheme 1037

Scheme 1038

Scheme 1039

More articles — Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 6 of 7 (Coupe)

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