Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 2 of 7 (Coupe): Other Volvo C70 I

Signal sporadic: Intermittent fault

EFI-123 Outside temperature sensor, signal.

Scheme 686

1. Check outside temperature sensor and/or engine control module (ECM) connectors for loose connections according to «Loose connections (terminals)»(ref-408435-S33351084802011071200000) and contact resistance and oxidation according to «Contact resistance and oxidation»(ref-408435-S41703021522011071200000) .
2. Check cable between outside temperature sensor terminal 1 and engine control module (ECM) #A35 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) , an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) , and an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .
3. Check cable between outside temperature sensor terminal 2 and engine control module (ECM) #A18 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) , and an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Information»(ref-408500-S21858068502011071200000)

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 sporadic: Permanent fault

EFI-251 Outside temperature sensor, signal.

Scheme 687

Scheme 688

Scheme 689

Scheme 690

1. Ignition off.
2. Check temperature sensor connector (blue) for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
3. Check control module connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
4. Temperature sensor connected.
5. Control module connected.
6. Start the engine and idle it.
7. Wait 5 minutes. Select Volvo Scan Tool (ST) to read off diagnostic trouble codes (DTCs).

If EFI-251 is stored they should have intermittent status.

1. OK Refer to «Fault-tracing information»(ref-408500-S16881544422011071200000)
2. NOT OK Refer to «Checking diagnostic trouble codes (DTCs)»(ref-408500-S08039984282011071200000)

1. The diagnostic trouble code (DTC) has been caused by loose connections in the outside temperature sensor and/or engine control module (ECM) connectors.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S13444374602011071200000)

Replacing outside temperature sensor

1. Try a new outside temperature sensor.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S13444374602011071200000)

Verification

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

Scheme 691

Scheme 692

Scheme 693

1. Ignition off.
2. Reconnect connectors, reinstall components etc.
3. Disconnect the Volvo Scan Tool (ST) from the VIDA station and use it in stand-alone mode. Test drive the car. Use the Volvo Scan Tool (ST) to read off diagnostic trouble codes (DTCs).

If EFI-251 is stored they should have intermittent status.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S25763935842011071200000)

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. Intermittent fault

EFI-251 Outside temperature sensor, signal.

Checking cables and terminals

1. Check outside temperature sensor and control module connectors for loose connections according to «Loose connections (terminals)»(ref-408435-S33351084802011071200000) and contact resistance and oxidation according to «Contact resistance and oxidation»(ref-408435-S41703021522011071200000) .
2. Check cable between outside temperature sensor terminal 1 and engine control module (ECM) #A35 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) , and an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .
3. Check cable between outside temperature sensor terminal 2 and engine control module (ECM) #A18 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Information»(ref-408500-S03134296882011071200000)

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. Permanent fault

EFI-251 Outside temperature sensor, signal.

Scheme 694

Scheme 695

Scheme 696

1. Ignition off.
2. Wait for approximately 150 seconds (cars with immobilizer 245 seconds).
3. Disconnect outside temperature sensor (blue connector). Connect an ohmmeter between outside temperature sensor connector terminal 2 and ground.

The ohmmeter should read approximately 0 ohms.

1. OK Refer to «Checking the signal cable»(ref-408500-S05960373532011071200000)
2. NOT OK Refer to «Checking control module connector»(ref-408500-S16884995122011071200000)

Scheme 697

1. Ignition on.
2. Temperature sensor disconnected. Connect a voltmeter between temperature sensor connector terminals 1 and 2 (engine control module (ECM) side).

The voltmeter should read approximately 5 V.

1. OK Refer to «Checking temperature sensor resistance»(ref-408500-S29789862012011071200000)
2. LOW Refer to «Checking control module connector»(ref-408500-S04698159782011071200000)
3. HIGH Refer to «Checking for a short-circuit»(ref-408500-S42445199522011071200000)

Checking for a short-circuit

1. Check cable between outside temperature sensor terminal 1 and engine control module (ECM) #A35 for a short-circuit to voltage supply according to «Short-circuit to supply voltage. Permanent faults»(ref-408435-S39443934942011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Checking the outside temperature sensor»(ref-408500-S05507320032011071200000)

Checking control module connector

1. Ignition off.
2. Temperature sensor disconnected.
3. Check control module connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
4. Control module connected. Connect an ohmmeter between temperature sensor connector terminal 2 (engine control module (ECM) side) and ground.

The ohmmeter should read approximately 0 ohms.

1. OK Refer to «Fault-tracing information»(ref-408500-S11868627882011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S30711683182011071200000)

The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.

1. Continue Refer to «Verification»(ref-408500-S40747745042011071200000)

Checking for an open-circuit

1. Check cable between temperature sensor terminal 2 and engine control module (ECM) #A18 for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S40747745042011071200000)

Checking temperature sensor resistance

1. Ignition off.
2. Temperature sensor disconnected. Connect an ohmmeter between temperature sensor connector terminals 1 and 2 (temperature sensor side). Temperature (°C) Resistance ohms -10 2190-2270 0 1390-1420 +10 890-930 +20 590-630 +30 400-430 +40 270-300

The ohmmeter should read approximately 500 ohms at +25°C (see table above).

1. OK Refer to «Checking for contact resistance and oxidation»(ref-408500-S11037741182011071200000)
2. NOT OK Refer to «Replacing outside temperature sensor»(ref-408500-S10294333032011071200000)

Checking for contact resistance and oxidation

The diagnostic trouble code (DTC) has been caused by loose connections in the outside temperature sensor connector.

1. Check connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S40747745042011071200000)

1. Try a new outside temperature sensor.

Scheme 698

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S40747745042011071200000)

Checking the outside temperature sensor

HINT: The outside temperature sensor can malfunction due to a short-circuit to supply voltage in the signal cable. Check the temperature sensor as follows

1. Ignition off.
2. Temperature sensor disconnected. Connect an ohmmeter between temperature sensor connector terminals 1 and 2 (temperature sensor side). Temperature (°C) Resistance ohms -10 2190-2270 0 1390-1420 +10 890-930 +20 590-630 +30 400-430 +40 270-300

The ohmmeter should read approximately 500 ohms at +25°C (see table above).

1. OK Refer to «Fault-tracing information»(ref-408500-S37911149712011071200000)
2. NOT OK Refer to «Replacing outside temperature sensor»(ref-408500-S29034604452011071200000)

Temperature sensor is OK.

1. Continue Refer to «Verification»(ref-408500-S40747745042011071200000)

1. Try a new outside temperature sensor.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S40747745042011071200000)

1. Ignition off.
2. Temperature sensor disconnected.
3. Check control module connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
4. Control module connected.
5. Ignition on. Connect a voltmeter between temperature sensor connector terminals 1 and 2 (engine control module (ECM) side).

The voltmeter should read approximately 5 V.

1. OK Refer to «Fault-tracing information»(ref-408500-S23108074012011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S05388355622011071200000)

The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.

1. Continue Refer to «Verification»(ref-408500-S40747745042011071200000)

1. Check cable between temperature sensor terminal 1 and engine control module (ECM) #A35 for a short-circuit to voltage supply according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S40747745042011071200000)

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

1. Ignition off.
2. Reconnect connectors, reinstall components etc.
3. Ignition on. Select Volvo Scan Tool (ST) to read off the outside temperature. NOTE: If the radiator is hot the outside temperature sensor will heat up if the car is stationary.

Is the outside temperature value within bounds?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-408500-S15337768172011071200000)

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. Intermittent fault

EFI-251 Outside temperature sensor, signal.

1. Check cable between outside temperature sensor terminal 1 and engine control module (ECM) #A35 for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Information»(ref-408500-S34971495672011071200000)

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. Permanent fault

EFI-251 Outside temperature sensor, signal.

Checking the signal cable

1. Ignition on.
2. Disconnect temperature sensor. Connect a voltmeter between temperature sensor connector terminal 1 and ground.

The reading should be approximately 5 V.

1. OK Refer to «Replacing outside temperature sensor»(ref-408500-S07182960652011071200000)
2. NOT OK Refer to «Checking for a short-circuit»(ref-408500-S24999969562011071200000)

1. Try a new outside temperature sensor.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S18080923332011071200000)

Scheme 699

1. Check cable between temperature sensor terminal 1 and engine control module (ECM) #A35 for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-408435-S41115456742011071200000) .

Scheme 700

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S18080923332011071200000)

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

1. Ignition off.
2. Reconnect connectors, reinstall components etc.
3. Ignition on. Select Volvo Scan Tool (ST) to read off the outside temperature. NOTE: If the radiator is hot the outside temperature sensor will heat up if the car is stationary.

Is the outside temperature value within bounds?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-408500-S38572160332011071200000)

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.

EFI-311: Speedometer, signal

Condition

Scheme 701

Diagnostic trouble code (DTC) EFI-311 is stored if engine speed (RPM) exceeds 3.330 rpm, internal load signal is above 6.5 ms and road speed is below 2 km/h for 7.5 seconds.

Substitute Value

1. engine control module (ECM) assumes 0 km/h
2. leakage diagnostic is disabled.

Possible Source

1. short-circuit to ground or supply voltage in signal cable
2. open-circuit in signal cable
3. contact resistance in terminals
4. defective speedometer
5. fault in circuit between ABS control module and combined instrument panel.

Fault symptom[s]

1. no reading on speedometer, depending on fault cause.

Faulty signal: Intermittent fault

EFI-311 Speedometer signal

1. Fault-trace combined instrument panel and vehicle speed sensor (VSS) circuit for intermittent faults according to relevant service information and an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .
2. Check control module and combined instrument panel connectors and connector 24/13 for loose connections according to «Loose connections (terminals)»(ref-408435-S33351084802011071200000) . Check cable between the combined instrument panel terminal A7 and engine control module (ECM) #B18 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) , and an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Information»(ref-408500-S13089058912011071200000)

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

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

Faulty signal. Permanent fault

EFI-311 Speedometer signal

Scheme 702

Check to see if the car has a VDO or Yazaki combined instrument panel. The upper combined instrument panel is a VDO and the lower a Yazaki.

1. VDO Refer to «Checking diagnostic trouble codes (DTCs) in the combined instrument panel»(ref-408500-S00220136832011071200000)
2. Yazaki Refer to «Checking speedometer»(ref-408500-S27021977152011071200000)

Checking speedometer

1. Disconnect the Volvo Scan Tool (ST) from the VIDA station and use the instrument in stand-alone mode. Test drive the car.

Check that speedometer is operating correctly.

1. OK Refer to «Connector A»(ref-408500-S27441925152011071200000)
2. NOT OK Refer to «Checking diagnostic trouble codes (DTCs) in the ABS system»(ref-408500-S32731721802011071200000)

1. Fault-trace according to relevant service information.

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S15602076822011071200000)

1. Fault-trace according to relevant service information.

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S15602076822011071200000)

Scheme 703

Scheme 704

Scheme 705

Scheme 706

1. Connect the breakout box and check ground terminals according to «Connecting breakout box (connector B)»(ref-408501-S06710340572011071200000) .
2. Connect control module.
3. Gear selector in Neutral.
4. Raise car so that front wheels are free of the ground.
5. Ignition on. Connect an oscilloscope between terminals #18 (#B18) and #28 (#B28) on the breakout box. Rotate the front wheels. NOTE: When the rear wheels are stationary and the front wheels rotate diagnostic trouble codes (DTCs) may can be stored in the ABS system. Erase ABS system diagnostic trouble codes (DTCs) according to relevant service information after fault-tracing.

The value on the oscilloscope should oscillate between approximately 0.5 V and above battery voltage.

1. OK Refer to «Fault-tracing information»(ref-408500-S30152156132011071200000)
2. NOT OK Refer to «Checking signal cable voltage»(ref-408500-S37321280312011071200000)

The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.

1. Check connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000)

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S15602076822011071200000)

Checking signal cable voltage

1. Breakout box connected.
2. Gear selector in Neutral.
3. Raise car so that front wheels are free of the ground.
4. Ignition on. Connect an oscilloscope between terminals #18 (#B18) and #28 (#B28) on the breakout box. Rotate the front wheels. NOTE: When the rear wheels are stationary and the front wheels rotate diagnostic trouble codes (DTCs) may can be stored in the ABS system. Erase any diagnostic trouble codes (DTCs) stored in the ABS system after fault-tracing.

The value on the oscilloscope should oscillate between approximately 0.5 V and above battery voltage.

1. O V Refer to «Fault-tracing information»(ref-408500-S14342079202011071200000)
2. 5 V Refer to «Checking the signal cable»(ref-408500-S35146833522011071200000)

1. Check cable between the combined instrument panel terminal A7 and engine control module (ECM) #B18 for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-408435-S41115456742011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S15602076822011071200000)

Scheme 707

1. Breakout box connected.
2. Ignition on. Connect an electrician's screwdriver (3 W bulb at least) between terminals #18 (#B18) and #28 (#B28) on the breakout box.

The electrician's screwdriver should not light.

1. OK Refer to «Checking for an open-circuit»(ref-408500-S19725732132011071200000)
2. NOT OK Refer to «Checking for a short-circuit»(ref-408500-S21467142242011071200000)

1. Check cable between the combined instrument panel terminal A7 and engine control module (ECM) #B18 for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S15602076822011071200000)

1. Check cable between the combined instrument panel terminal A7 and engine control module (ECM) #B18 for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-408435-S39443934942011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S15602076822011071200000)

1. Fault-trace combined instrument panel according to relevant service information and/or according to relevant service information.

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S15602076822011071200000)

Checking vehicle speed signal

1. Connect the breakout box and check ground terminals according to «Connecting breakout box (connector B)»(ref-408501-S06710340572011071200000) .
2. Connect control module.
3. Gear selector in Neutral.
4. Raise car so that front wheels are free of the ground.
5. Ignition on. Connect an oscilloscope between terminals #18 (#B18) and #28 (#B28) on the breakout box. Rotate the front wheels. NOTE: When the rear wheels are stationary and the front wheels rotate diagnostic trouble codes (DTCs) may can be stored in the ABS system. Erase ABS system diagnostic trouble codes (DTCs) according to relevant service information after fault-tracing.

The value on the oscilloscope should oscillate between approximately 0.5 V and above battery voltage.

1. OK Refer to «Fault-tracing information»(ref-408500-S30152156132011071200000)
2. NOT OK Refer to «Checking the signal cable»(ref-408500-S30885025332011071200000)

1. Ignition off.
2. Breakout box connected.
3. Expose combined instrument panel according to relevant service information. Connect an ohmmeter between combined instrument panel connector A terminal 7 and #18 (#A18) on the breakout box.

The ohmmeter should read approximately 0 ohms.

1. OK Refer to «Fault-tracing information»(ref-408500-S16955511122011071200000)
2. NOT OK Refer to «Fault-tracing information»(ref-408500-S14617805022011071200000)

1. Fault-trace combined instrument panel and vehicle speed sensor (VSS) circuit according to relevant service information.

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S15602076822011071200000)

1. Check cable between the combined instrument panel terminal A7 and engine control module (ECM) #B18 for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S15602076822011071200000)

Connector A

Special tools

See 9511351

See 9813190

Scheme 708

Is the test box connected to the control module?

1. YES Refer to «Checking vehicle speed signal»(ref-408500-S39995256922011071200000)
2. NO Refer to «Connection of break-out box to connector A (black)»(ref-408500-S04423112262011071200000)

Scheme 709

Scheme 710

1. Switch off ignition.
2. Disconnect ECM. NOTE: The ECM must not be removed from the car until the main relay has interrupted the supply. This may take up to 150 seconds after the ignition has been switched off. Plug adapter «9511351»(ref-403953-S10348238732011061000000) into ECM base and connect break-out box «9813190»(ref-403953-S32930552542011061000000) to adapter.

1. Continue Refer to «Checking ground terminals»(ref-408500-S17173892782011071200000)

Scheme 711

1. Switch off ignition.
2. Switch off all power consumers, such as interior lighting and radio. Use ohmmeter to measure resistance between battery negative terminal and #13 (#A13) on break-out box #28 (#A28) on break-out box #42 (#A42) on break-out box

Instrument should indicate approx. 0 ohms in all cases.

1. OK Refer to «Checking vehicle speed signal»(ref-408500-S39995256922011071200000)
2. NOT OK Refer to «Checking for open-circuit, contact resistance and oxidation»(ref-408500-S10598387082011071200000)

Checking for open-circuit, contact resistance and oxidation

1. Check ground terminals 31/32 and 31/33 at rear of engine and associated wiring for open-circuit as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) , and for contact resistance and oxidation as per «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
2. Check ground lead between engine and chassis for open-circuit as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) , and for contact resistance and oxidation as per «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

Scheme 712

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S17182857432011071200000)

HINT: After repair, it is necessary to check that the fault has been corrected.

HINT: Perform as described below.

1. Switch off ignition.
2. Switch off all power consumers, such as interior lighting and radio. Use ohmmeter to measure resistance between battery negative terminal and #13 (#A13) on break-out box #28 (#A28) on break-out box #42 (#A42) on break-out box

Instrument should indicate approx. 0 ohms in all cases.

1. OK Refer to «Checking vehicle speed signal»(ref-408500-S39995256922011071200000)
2. NOT OK Refer to «Information»(ref-408500-S04682281572011071200000)

The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.

Complete the fault-tracing for those fault or try again.

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

1. Ignition off.
2. Control module connected.
3. Combined instrument panel connected.
4. Disconnect the Volvo Scan Tool (ST) from the VIDA station and use the instrument in stand-alone mode.
5. Test drive the car.
6. Go into scrolling values. Read off the speedometer signal.

Is the correct vehicle speed signal displayed?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-408500-S28635583222011071200000)

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.

Special tools

See 9511351

See 9813190

Connection of break-out box to connector A (black)

1. Switch off ignition.
2. Disconnect ECM. NOTE: The ECM must not be removed from the car until the main relay has interrupted the supply. This may take up to 150 seconds after the ignition has been switched off. Plug adapter «9511351»(ref-403953-S10348238732011061000000) into ECM base and connect break-out box «9813190»(ref-403953-S32930552542011061000000) to adapter.

1. Continue Refer to «Checking ground terminals»(ref-408500-S07575492302011071200000)

Checking ground terminals

1. Switch off ignition.
2. Switch off all power consumers, such as interior lighting and radio. Use ohmmeter to measure resistance between battery negative terminal and #13 (#A13) on break-out box #28 (#A28) on break-out box #42 (#A42) on break-out box

Instrument should indicate approx. 0 ohms in all cases.

1. OK Refer to «Checking vehicle speed signal»(ref-408500-S35375369422011071200000)
2. NOT OK Refer to «Checking for open-circuit, contact resistance and oxidation»(ref-408500-S05171027512011071200000)

1. Check ground terminals 31/32 and 31/33 at rear of engine and associated wiring for open-circuit as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) , and for contact resistance and oxidation as per «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
2. Check ground lead between engine and chassis for open-circuit as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) , and for contact resistance and oxidation as per «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S28007099092011071200000)

HINT: After repair, it is necessary to check that the fault has been corrected.

HINT: Perform as described below.

1. Switch off ignition.
2. Switch off all power consumers, such as interior lighting and radio. Use ohmmeter to measure resistance between battery negative terminal and #13 (#A13) on break-out box #28 (#A28) on break-out box #42 (#A42) on break-out box

Instrument should indicate approx. 0 ohms in all cases.

1. OK Refer to «Checking vehicle speed signal»(ref-408500-S35375369422011071200000)
2. NOT OK Refer to «Information»(ref-408500-S06576157812011071200000)

The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.

Complete the fault-tracing for those fault or try again.

EFI-314: Camshaft position (CMP) sensor, signal

Condition

Scheme 713

If the engine control module (ECM) does not receive any signal from the camshaft position (CMP) sensor for 2.4 engine revolutions, diagnostic trouble code (DTC) EFI-314 is stored after 1 second when the next attempt to start the engine is made.

Substitute Value

1. on engine start fuel injection and ignition are absent.

Possible Source

1. short-circuit to ground or supply voltage in signal cable
2. open-circuit in signal cable, power cable or ground lead
3. contact resistance in terminals
4. defective camshaft position (CMP) sensor.

Fault symptom[s]

1. engine does not start.

EFI-314 Camshaft position (CMP) sensor, signal

1. Check camshaft position (CMP) sensor and engine control module (ECM) connectors for loose connections according to «Loose connections (terminals)»(ref-408435-S33351084802011071200000) and contact resistance and oxidation according to «Contact resistance and oxidation»(ref-408435-S41703021522011071200000) .
2. Check cable between camshaft position (CMP) sensor terminal 1 and engine control module (ECM) #A18 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) .
3. Check cable between the camshaft position (CMP) sensor terminal 2 and engine control module (ECM) #A21 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) , an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) , and an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .
4. Check cable between camshaft position (CMP) sensor terminal 3 and engine control module (ECM) #A36 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Information»(ref-408500-S42185407022011071200000)

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).

EFI-314 Camshaft position (CMP) sensor, signal

Scheme 714

1. Ignition off.
2. Wait for approximately 150 seconds (cars with immobilizer 245 seconds).
3. Disconnect the camshaft position (CMP) sensor. Connect an ohmmeter between the camshaft position (CMP) sensor connector terminal 1 (engine control module (ECM) side) and ground.

The ohmmeter should read approximately 0 ohms.

1. OK Refer to «Checking power cable»(ref-408500-S41141460752011071200000)
2. NOT OK Refer to «Checking control module connector»(ref-408500-S18516755242011071200000)

1. Ignition off.
2. Camshaft position (CMP) sensor disconnected.
3. Check control module connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000)
4. Control module connected. Connect an ohmmeter between the camshaft position (CMP) sensor connector terminal 1 (engine control module (ECM) side) and ground.

The ohmmeter should read approximately 0 ohms.

1. OK Refer to «Fault-tracing information»(ref-408500-S06323419732011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S16241998282011071200000)

The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.

1. Continue Refer to «Verification»(ref-408500-S38366235852011071200000)

1. Check cable between camshaft position (CMP) sensor terminal 1 and engine control module (ECM) #A18 for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000)

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S38366235852011071200000)

Checking power cable

1. Ignition on.
2. Camshaft position (CMP) sensor disconnected. Connect a voltmeter between camshaft position (CMP) sensor terminal 3 (engine control module (ECM) side) and ground.

The voltmeter should read battery voltage.

1. OK Refer to «Checking the signal cable»(ref-408500-S32998875902011071200000)
2. NOT OK Refer to «Checking control module connector»(ref-408500-S21420434992011071200000)

1. Ignition off.
2. Camshaft position (CMP) sensor disconnected.
3. Check control module connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000)
4. Control module connected.
5. Ignition on. Connect a voltmeter between camshaft position (CMP) sensor terminal 3 (engine control module (ECM) side) and ground.

The voltmeter should read battery voltage.

1. OK Refer to «Fault-tracing information»(ref-408500-S15815405442011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S17136887412011071200000)

The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.

1. Continue Refer to «Verification»(ref-408500-S38366235852011071200000)

1. Check cable between camshaft position (CMP) sensor terminal 3 and engine control module (ECM) #A36 for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000)

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S38366235852011071200000)

1. Ignition on.
2. Camshaft position (CMP) sensor disconnected. Connect a voltmeter between camshaft position (CMP) sensor terminal 2 (engine control module (ECM) side) and ground.

The voltmeter should read battery voltage.

1. OK Refer to «Checking signal cable voltage»(ref-408500-S28342692292011071200000)
2. NOT OK Refer to «Checking signal cable resistance to ground»(ref-408500-S01474300902011071200000)

1. Ignition on.
2. Camshaft position (CMP) sensor disconnected. Connect an electrician's screwdriver between camshaft position (CMP) connector terminal 2 (engine control module (ECM) side) and ground.

Does the electrician's screwdriver light?

1. YES Refer to «Checking for a short-circuit»(ref-408500-S02334190692011071200000)
2. NO Refer to «Checking camshaft position (CMP) sensor»(ref-408500-S13892533902011071200000)

1. Check cable between the camshaft position (CMP) sensor terminal 2 and engine control module (ECM) #A21 for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-408435-S39443934942011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Checking camshaft position (CMP) sensor signal»(ref-408500-S05324820952011071200000)

Checking signal cable resistance to ground

1. Ignition off.
2. Wait for approximately 150 seconds (cars with immobilizer 245 seconds).
3. Camshaft position (CMP) sensor disconnected. Connect an ohmmeter between the camshaft position (CMP) sensor connector terminal 2 (engine control module (ECM) side) and ground.

Is resistance infinite?

1. YES Refer to «Checking control module connector»(ref-408500-S16582190442011071200000)
2. NO Refer to «Checking for a short-circuit»(ref-408500-S16122273322011071200000)

1. Check cable between the camshaft position (CMP) sensor terminal 2 and engine control module (ECM) #A21 for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-408435-S41115456742011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S38366235852011071200000)

1. Ignition off.
2. Camshaft position (CMP) sensor disconnected.
3. Check control module connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000)
4. Control module connected. Connect an ohmmeter between the camshaft position (CMP) sensor connector terminal 2 (engine control module (ECM) side) and ground.

The ohmmeter should read 0.5 - 3.0 kohms.

1. OK Refer to «Fault-tracing information»(ref-408500-S18932140332011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S05933500062011071200000)

The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.

1. Continue Refer to «Verification»(ref-408500-S38366235852011071200000)

1. Check cable between the camshaft position (CMP) sensor terminal 2 and engine control module (ECM) #A21 for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000)

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S38366235852011071200000)

Checking camshaft position (CMP) sensor

1. Connect the camshaft position (CMP) sensor. Try to start the engine.

Does the engine start?

1. YES Refer to «Checking for contact resistance and oxidation»(ref-408500-S08205395322011071200000)
2. NO Refer to «Replacing camshaft position (CMP) sensor»(ref-408500-S10999715192011071200000)

The cause of the diagnostic trouble code (DTC) has been loose connections in the camshaft position (CMP) sensor and/or engine control module (ECM) connectors.

1. Check connectors for contact resistance and oxidation and remedy in accordance with «Contact resistance and oxidation»(ref-408435-S11196285822011071200000)

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S38366235852011071200000)

Replacing camshaft position (CMP) sensor

1. Try a new camshaft position (CMP) sensor.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S38366235852011071200000)

Checking camshaft position (CMP) sensor signal

1. The camshaft position (CMP) sensor may fail if there has been a short-circuit to supply voltage in the signal cable. Check camshaft position (CMP) sensor as follows.
2. Connect the camshaft position (CMP) sensor. Try to start the engine.

Does the engine start?

1. YES Refer to «Fault-tracing information»(ref-408500-S19138330382011071200000)
2. NO Refer to «Replacing camshaft position (CMP) sensor»(ref-408500-S40420030992011071200000)

Camshaft position (CMP) sensor OK.

1. Try a new camshaft position (CMP) sensor.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S38366235852011071200000)

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

1. Ignition off.
2. Reconnect connectors and reinstall components.
3. Try to start the engine.

Does the engine start?

1. YES VERIFIED: Troubleshooting has been completed.
2. NO Refer to «Information»(ref-408500-S10565485902011071200000)

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.

EFI-315: Canister purge (CP) valve, leakage

Condition

Scheme 715

The EVAP canister shut-off valve closes canister ventilation, the fuel tank system is now completely closed.

If the pressure in the fuel tank drops below a set value, diagnostic trouble code (DTC) EFI-315 (Canister purge (CP) valve, leakage) is stored.

Substitute Value

1. twin heated oxygen sensor (HO2S) control disabled
2. pulsed secondary air injection (PAIR) diagnostic disabled.

Possible Source

1. leaking canister purge (CP) valve.

Fault symptom[s]

1. none.

Leakage. Intermittent fault

EFI-315 Canister purge (CP) valve, leakage

Checking canister purge (CP) valve

1. Check the canister purge (CP) valve for dirt and deposits. Try to activate the canister purge (CP) valve to check its function.
2. Check that the canister purge (CP) valve is not sticking when it has been activated.

Continue when the fault has been remedied.

1. Continue Refer to «Information»(ref-408500-S28723734772011071200000)

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).

Leakage. Permanent fault

EFI-315 Canister purge (CP) valve, leakage

Scheme 716

1. Ignition off.
2. Disconnect the battery negative lead.
3. Disconnect canister purge (CP) valve wiring and connector.
4. Pull canister purge (CP) valve out of its mounting.
5. Connect vacuum pump «9995843»(ref-403953-S06330547042011061000000) to canister purge (CP) valve. NOTE: Make a note of the direction of flow through the canister purge (CP) valve. NOTE: Check that the hose between the vacuum pump and canister purge (CP) valve is no longer than 100 mm. Pump up a negative pressure of 400 mm Hg. Check that this negative pressure does not rise to atmospheric pressure within 30 seconds.

Does the negative pressure rise to atmospheric pressure within 30 seconds?

1. YES Refer to «Replacing canister purge (CP) valve»(ref-408500-S35945595052011071200000)
2. NO Refer to «Checking line to fuel tank»(ref-408500-S14512515852011071200000)

Scheme 717

1. Carefully disconnect the line from the canister purge (CP) valve on the fuel tank.
2. Connect vacuum pump «9995843»(ref-403953-S06330547042011061000000) to the line from the fuel tank.
3. Try to pump up a vacuum. (It should not be possible to pump up a vacuum). 1. Fuel tank 2. Roll-over valve 3. EVAP canister 4. Canister purge (CP) valve 5. EVAP canister shut-off valve

Is it possible to pump up a vacuum?

1. YES Refer to «Checking EVAP system lines»(ref-408500-S31171910942011071200000)
2. NO Refer to «Fault-tracing information»(ref-408500-S30531711632011071200000)

1. System is OK.

1. Continue Refer to «Verification»(ref-408500-S33144938182011071200000)

Scheme 718

1. Check that the line between the EVAP canister and roll-over valve is not blocked or damaged.
2. Check that the line between the roll-over valve and fuel tank is not blocked or damaged. 1. Fuel tank 2. Roll-over valve 3. EVAP canister 4. Canister purge (CP) valve 5. EVAP canister shut-off valve Replace blocked or damaged components.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S33144938182011071200000)

Replacing canister purge (CP) valve

1. Try a new canister purge (CP) valve.

Scheme 719

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S33144938182011071200000)

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

1. Ignition off.
2. Reinstall all hoses/components.
3. Ignition on.
4. Select Volvo Scan Tool (ST) to erase diagnostic trouble codes (DTCs).

Verification, continued

1. Disconnect the Volvo Scan Tool (ST) from the VIDA station and use it in stand-alone mode.
2. Run the engine to operating temperature (above 70°C).
3. Air conditioning (A/C) off.
4. Gear selector in P or N
5. Engine idling
6. Go into diagnostic test mode menu. Activate leak diagnostic.
7. Wait until the diagnostic is complete. This can take up to 2 minutes. NOTE: If the texts START CONDITIONS NOT MET or DIAGNOSTIC INTERRUPTED are displayed the diagnostic cannot be carried out. This can have several causes: for example high fuel evaporation, high canister charge, high tank pressure, fuel trim not active or a diagnostic trouble code (DTC) stored after the diagnostic has been activated. Check that no diagnostic trouble codes (DTCs) stored, try to activate the diagnostic again. Sometimes several attempts will have to be made before the diagnostic is carried out.

Verification, continued

1. Volvo Scan Tool (ST) connect to VIDA station.
2. Engine idling
3. Select Volvo Scan Tool (ST) to read off diagnostic trouble codes (DTCs).

Does the diagnostic trouble code (DTC) recur?

1. YES Refer to «Information»(ref-408500-S11175521712011071200000)
2. NO VERIFIED: Troubleshooting has been completed.

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.

EFI-315 Canister purge (CP) valve, leakage

1. Check the canister purge (CP) valve for dirt and deposits. Try to activate the canister purge (CP) valve to check its function.
2. Check that the canister purge (CP) valve is not sticking when it has been activated.

Continue when the fault has been remedied.

1. Continue Refer to «Information»(ref-408500-S14390276412011071200000)

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).

EFI-335: Cable fault between AW 50-42 and Motronic 4.4 (lamp lights)

Condition

Scheme 720

The automatic transmission control module (TCM) can request the lighting of the malfunction indicator lamp (MIL) by transmitting a signal to the engine control module (ECM). Diagnostic trouble code (DTC) EFI-335 is stored if the engine control module (ECM) registers a fault in the signal cable. When the engine is started the engine control module (ECM) checks for a short-circuit to supply voltage or open-circuit (high signal) in the signal cable. When the engine is running, the engine control module (ECM) checks for a short-circuit to ground in the signal cable (low signal).

Substitute Value

1. none.

Possible Source

Signal too high

1. open-circuit in signal cable
2. short-circuit to supply voltage in signal cable

Signal too low

1. short-circuit to ground in signal cable

Fault symptom[s]

1. none.

EFI-335 Cable fault between AW 50-42 and Motronic 4.4 (lamp lights)

Checking cable

1. Check cable between engine control module (ECM) #B26 and transmission control module (TCM) #B15 for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) and an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) .
2. Check control module connectors for loose connections according to «Loose connections (terminals)»(ref-408435-S33351084802011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Information»(ref-408500-S12521604052011071200000)

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).

EFI-335 Cable fault between AW 50-42 and Motronic 4.4 (lamp lights)

Special tools

See 9511351

See 9813190

1. Switch off ignition.
2. Disconnect ECM. NOTE: The ECM must not be removed from the car until the main relay has interrupted the supply. This may take up to 150 seconds after the ignition has been switched off. Plug adapter «9511351»(ref-403953-S10348238732011061000000) into ECM base and connect break-out box «9813190»(ref-403953-S32930552542011061000000) to adapter.

1. Continue Refer to «Checking ground terminals»(ref-408500-S38474747252011071200000)

1. Switch off ignition.
2. Switch off all power consumers, such as interior lighting and radio. Use ohmmeter to measure resistance between battery negative terminal and #13 (#A13) on break-out box #28 (#A28) on break-out box #42 (#A42) on break-out box

Instrument should indicate approx. 0 ohms in all cases.

1. OK Refer to «Checking the signal cable»(ref-408500-S16006564532011071200000)
2. NOT OK Refer to «Checking for open-circuit, contact resistance and oxidation»(ref-408500-S01384495892011071200000)

1. Check ground terminals 31/32 and 31/33 at rear of engine and associated wiring for open-circuit as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) , and for contact resistance and oxidation as per «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
2. Check ground lead between engine and chassis for open-circuit as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) , and for contact resistance and oxidation as per «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S29285197442011071200000)

HINT: After repair, it is necessary to check that the fault has been corrected.

HINT: Perform as described below.

1. Switch off ignition.
2. Switch off all power consumers, such as interior lighting and radio. Use ohmmeter to measure resistance between battery negative terminal and #13 (#A13) on break-out box #28 (#A28) on break-out box #42 (#A42) on break-out box

Instrument should indicate approx. 0 ohms in all cases.

1. OK Refer to «Checking the signal cable»(ref-408500-S16006564532011071200000)
2. NOT OK Refer to «Information»(ref-408500-S05766954482011071200000)

1. Breakout box connected. Connect an ohmmeter between breakout box #26 (#B26) and ground.

The ohmmeter should read 0 - 3 kohms.

1. OK Refer to «Checking for a short-circuit»(ref-408500-S08444467182011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S15755108892011071200000)

1. Check cable between engine control module (ECM) #B26 and transmission control module (TCM) #B15 for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-408435-S39443934942011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification of repair»(ref-408500-S22625068742011071200000)

Scheme 721

1. Check cable between engine control module (ECM) #B26 and transmission control module (TCM) #B15 for a short-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification of repair»(ref-408500-S22625068742011071200000)

The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.

Complete the fault-tracing for those fault or try again.

Verification of repair

HINT: After a repair, it may be necessary to check that the fault is properly rectified.

HINT: One way of doing this is to check that the ECM has conducted its own diagnosis for the specific function/component which has been repaired without recurrence of the fault.

1. Ignition off.
2. Reconnect connectors, components etc.
3. Shut off ST by setting switch on adapter lead box to "OFF".
4. Disconnect ST from VIDA cart.

1. Continue Refer to «Volvo System Tester as verification tool»(ref-408500-S31371034882011071200000)

Volvo System Tester as verification tool

It is possible to check the ECM's self-diagnosis by using the Volvo System Tester. The Diagnosis Test features a menu called Diagnosis Check. Enter this menu and you come first to a status menu, where it is possible to see if all the conditions which the ECM works with have been met or not.

As regards repair verification, it may be of value to see if a TRIP has occurred or not.

TRIP=YES

All the diagnosis functions have been undertaken at least once during one and the same run.

TRIP=NO

All diagnosis is not yet complete, a sub-menu shows which diagnosis functions are not yet ready.

REPLACEMENT TRIP

The ECM has not been able to implement all diagnosis since certain fault codes have prevented another diagnosis.

If a TRIP is not completed, press ENTER in this menu to view which functions have not been tested. This menu only shows those functions which are not tested, if any function is tested while this menu is active, the status is changed to TESTED.

Most functions/components are tested when the engine is started and the test continues as long as the engine is running. A few other functions require that certain pre-conditions are met before tests can be carried out. For example, in order to diagnose the TWC, the front and rear HO2S are used, so these must be tested before the TWC can be tested, otherwise the results will be entirely misleading.

1. Continue Refer to «Verification in the workshop»(ref-408500-S34804896212011071200000)

Verification in the workshop

1. If the control module has been without voltage supply during the fault tracing process, the engine should be started a few times before verification is carried out.
2. Ensure that there are no DTCs stored in the system before verification is carried out.
3. The A/C shall be off.
4. Start the engine and let it run at idling speed. Use the diagnostic check menu in the Volvo System Tester to check if the control module has carried out its self-diagnosis. Self-diagnosis for 3-1-5 (EVAP system), for example, may take up to 20 minutes with the engine at idling speed. If the control module has carried out its self-diagnosis and the DTC has not recurred, the fault has in all probability been rectified. NOTE: DTC 1-2-3 ECT sensor signal, faulty signal In order for this diagnosis to be carried out, the engine must be started at an engine temperature lower than +28 °C. DTC 5-1-4 Engine cooling fan half speed, signal This DTC is checked only when the control module tries to activate the engine cooling fan. DTC 3-2-5 Memory loss. This DTC appears immediately when the control module is connected to the voltage supply after a memory loss.

Self-diagnosis should have been carried out and DTC should not have been set.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK VERIFICATION FAILED: The fault should have been detected and remedied. As this is not the case fault-tracing has failed. Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

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.

EFI-335 Cable fault between AW 50-42 and Motronic 4.4 (lamp lights)

1. Check cable between engine control module (ECM) #B26 and transmission control module (TCM) #B15 for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Information»(ref-408500-S25472962492011071200000)

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).

EFI-335 Cable fault between AW 50-42 and Motronic 4.4 (lamp lights)

1. Check cable between engine control module (ECM) #B26 and transmission control module (TCM) #B15 for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-408435-S41115456742011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Verification of repair»(ref-408500-S00355986092011071200000)

HINT: After a repair, it may be necessary to check that the fault is properly rectified.

HINT: One way of doing this is to check that the ECM has conducted its own diagnosis for the specific function/component which has been repaired without recurrence of the fault.

1. Ignition off.
2. Reconnect connectors, components etc.
3. Shut off ST by setting switch on adapter lead box to "OFF".
4. Disconnect ST from VIDA cart.

1. Continue Refer to «Volvo System Tester as verification tool»(ref-408500-S17394821722011071200000)

It is possible to check the ECM's self-diagnosis by using the Volvo System Tester. The Diagnosis Test features a menu called Diagnosis Check. Enter this menu and you come first to a status menu, where it is possible to see if all the conditions which the ECM works with have been met or not.

As regards repair verification, it may be of value to see if a TRIP has occurred or not.

TRIP=YES

All the diagnosis functions have been undertaken at least once during one and the same run.

TRIP=NO

All diagnosis is not yet complete, a sub-menu shows which diagnosis functions are not yet ready.

REPLACEMENT TRIP

The ECM has not been able to implement all diagnosis since certain fault codes have prevented another diagnosis.

If a TRIP is not completed, press ENTER in this menu to view which functions have not been tested. This menu only shows those functions which are not tested, if any function is tested while this menu is active, the status is changed to TESTED.

Most functions/components are tested when the engine is started and the test continues as long as the engine is running. A few other functions require that certain pre-conditions are met before tests can be carried out. For example, in order to diagnose the TWC, the front and rear HO2S are used, so these must be tested before the TWC can be tested, otherwise the results will be entirely misleading.

1. Continue Refer to «Verification in the workshop»(ref-408500-S37612668212011071200000)

1. If the control module has been without voltage supply during the fault tracing process, the engine should be started a few times before verification is carried out.
2. Ensure that there are no DTCs stored in the system before verification is carried out.
3. The A/C shall be off.
4. Start the engine and let it run at idling speed. Use the diagnostic check menu in the Volvo System Tester to check if the control module has carried out its self-diagnosis. Self-diagnosis for 3-1-5 (EVAP system), for example, may take up to 20 minutes with the engine at idling speed. If the control module has carried out its self-diagnosis and the DTC has not recurred, the fault has in all probability been rectified. NOTE: DTC 1-2-3 ECT sensor signal, faulty signal In order for this diagnosis to be carried out, the engine must be started at an engine temperature lower than +28 °C. DTC 5-1-4 Engine cooling fan half speed, signal This DTC is checked only when the control module tries to activate the engine cooling fan. DTC 3-2-5 Memory loss. This DTC appears immediately when the control module is connected to the voltage supply after a memory loss.

Self-diagnosis should have been carried out and DTC should not have been set.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK VERIFICATION FAILED: The fault should have been detected and remedied. As this is not the case fault-tracing has failed. Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

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

EFI-355 Mass air flow (MAF) sensor, faulty signal

Checking throttle position (TP) sensor

1. Ignition on. Select Volvo Scan Tool (ST) to read off the value of the throttle position (TP) sensor.

At closed throttle position (CTP) voltage should be between 0.2 - 0.6 V. At wide open throttle (WOT) voltage should be between 3.8 - 4.6 V.

1. OK Refer to «Checking throttle position (TP) sensor signal»(ref-408500-S29300952382011071200000)
2. NOT OK Refer to «Checking connector»(ref-408500-S10339235362011071200000)

Checking throttle position (TP) sensor signal

1. Ignition on. Select Volvo Scan Tool (ST) to read off the value of the throttle position (TP) sensor signal while the throttle slowly opens from closed to wide open.

The signal should follow throttle position and should not have any interference.

1. OK Refer to «Checking for air leakage in the intake system»(ref-408500-S35529820472011071200000)
2. NOT OK Refer to «Replacing throttle position (TP) sensor»(ref-408500-S17970000322011071200000)

Replacing throttle position (TP) sensor

1. Try a new throttle position (TP) sensor.

Scheme 722

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S18207218112011071200000)

Checking connector

1. Ignition off.
2. Check throttle position (TP) sensor and/or engine control module (ECM) connectors for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
3. Connect throttle position (TP) sensor and/or the engine control module (ECM).
4. Ignition on. Select Volvo Scan Tool (ST) to read off the value of the throttle position (TP) sensor.

At closed throttle position (CTP) voltage should be between 0.2 - 0.6 V. At wide open throttle (WOT) voltage should be between 3.8 - 4.6 V.

1. OK Refer to «Checking for contact resistance and oxidation»(ref-408500-S20806769792011071200000)
2. NOT OK Refer to «Checking ground lead»(ref-408500-S14643226492011071200000)

The cause of the diagnostic trouble code (DTC) has been loose connections in the throttle position (TP) sensor and/or the engine control module (ECM) connectors.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S18207218112011071200000)

Checking ground lead

1. Ignition off.
2. Wait for approximately 150 seconds (cars with immobilizer 245 seconds).
3. Disconnect throttle position (TP) sensor. NOTE: If the engine cooling fan runs on, it must be allowed to stop before taking resistance readings. Connect an ohmmeter between throttle position (TP) sensor connector terminal 1 and ground.

The ohmmeter should read approximately 0 ohms.

1. OK Refer to «Checking the signal cable»(ref-408500-S19747854782011071200000)
2. NOT OK Refer to «Checking for a short-circuit»(ref-408500-S05265487992011071200000)

Check cable between throttle position (TP) sensor terminal 1 and engine control module (ECM) #A18 for contact resistance and oxidation according to Contact resistance and oxidation .

1. Continue Refer to «Verification»(ref-408500-S18207218112011071200000)

1. Ignition on.
2. Throttle position (TP) sensor disconnected. Connect a voltmeter between throttle position (TP) sensor connector terminal 3 and ground.

The voltmeter should read approximately 5 V.

1. OK Refer to «Checking power cable»(ref-408500-S00547966272011071200000)
2. NOT OK Refer to «Checking for a short-circuit»(ref-408500-S34614208282011071200000)

Check cable between throttle position (TP) sensor terminal 3 and engine control module (ECM) #A16 for contact resistance and oxidation according to Contact resistance and oxidation .

1. Continue Refer to «Verification»(ref-408500-S18207218112011071200000)

1. Ignition off.
2. Wait for approximately 150 seconds (cars with immobilizer 245 seconds).
3. Disconnect throttle position (TP) sensor. NOTE: If the engine cooling fan runs on, it must be allowed to stop before taking resistance readings. Connect an ohmmeter between throttle position (TP) sensor connector terminal 2 and ground.

The ohmmeter should read approximately 0.4 - 0.8 kohms.

1. OK Refer to «Replacing throttle position (TP) sensor»(ref-408500-S08112146012011071200000)
2. NOT OK Refer to «Checking for a short-circuit»(ref-408500-S10403802212011071200000)

1. Try a new throttle position (TP) sensor.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S18207218112011071200000)

Check cable between throttle position (TP) sensor terminal 2 and engine control module (ECM) #A15 for contact resistance and oxidation according to Contact resistance and oxidation .

1. Continue Refer to «Verification»(ref-408500-S18207218112011071200000)

Checking for air leakage in the intake system

Check for air leakage in the intake system according to Check for air leaks in the intake system .

Scheme 723

Is there a leak?

1. YES Refer to «Fault-tracing information»(ref-408500-S08437821852011071200000)
2. NO Refer to «Checking power ground»(ref-408500-S35699780452011071200000)

Remedy as necessary.

1. Continue Refer to «Verification»(ref-408500-S18207218112011071200000)

Scheme 724

1. Ignition off.
2. Wait for approximately 150 seconds (cars with immobilizer 245 seconds).
3. Disconnect mass air flow (MAF) sensor. Connect an ohmmeter between mass air flow (MAF) sensor connector terminal 1 and ground.

The ohmmeter should read approximately 0 ohms.

1. OK Refer to «Checking signal ground»(ref-408500-S25962499832011071200000)
2. NOT OK Refer to «Checking control module connector»(ref-408500-S22234213262011071200000)

1. Ignition off.
2. Mass air flow (MAF) sensor disconnected.
3. Check control module connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
4. Control module connected. Connect an ohmmeter between mass air flow (MAF) sensor connector terminal 1 and ground.

The ohmmeter should read approximately 0 ohms.

1. OK Refer to «Checking signal ground»(ref-408500-S25962499832011071200000)
2. NOT OK Refer to «Checking for contact resistance and oxidation»(ref-408500-S30521822132011071200000)

1. Check cable between mass air flow (MAF) sensor terminal 1 and engine control module (ECM) #A3 for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S18207218112011071200000)

Checking signal ground

1. Ignition off.
2. Mass air flow (MAF) sensor disconnected. Connect an ohmmeter between mass air flow (MAF) sensor connector terminal 2 and ground.

The ohmmeter should read approximately 0 ohms.

1. OK Refer to «Checking power cable»(ref-408500-S29817822662011071200000)
2. NOT OK Refer to «Checking control module connector»(ref-408500-S19051466572011071200000)

1. Ignition off.
2. Mass air flow (MAF) sensor disconnected.
3. Check control module connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
4. Control module connected. Connect an ohmmeter between mass air flow (MAF) sensor connector terminal 2 and ground.

The ohmmeter should read approximately 0 ohms.

1. OK Refer to «Checking power cable»(ref-408500-S29817822662011071200000)
2. NOT OK Refer to «Checking for contact resistance and oxidation»(ref-408500-S07588993782011071200000)

1. Check cable between mass air flow (MAF) sensor terminal 2 and engine control module (ECM) #A5 for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S18207218112011071200000)

1. Ignition off.
2. Disconnect mass air flow (MAF) sensor.
3. Ignition on. Connect a voltmeter between mass air flow (MAF) sensor connector terminal 3 and ground.

The voltmeter should read battery voltage.

1. OK Refer to «Checking the signal cable»(ref-408500-S13170035942011071200000)
2. NOT OK Refer to «Checking for contact resistance and oxidation»(ref-408500-S33213659132011071200000)

1. Check cable between mass air flow (MAF) sensor terminal 3 and main relay (2/32) terminal 3 for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S18207218112011071200000)

1. Ignition on.
2. Mass air flow (MAF) sensor disconnected. Connect a voltmeter between mass air flow (MAF) sensor connector terminal 4 and ground.

The voltmeter should read 0 - 1 V.

1. OK Refer to «Connecting the breakout box»(ref-408500-S36987193222011071200000)
2. NOT OK Refer to «Checking for contact resistance and oxidation»(ref-408500-S35385912992011071200000)

1. Check cable between mass air flow (MAF) sensor terminal 4 and engine control module (ECM) #A4 for contact resistance and oxidation according to according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S18207218112011071200000)

1. Ignition off.
2. Connect mass air flow (MAF) sensor.
3. Breakout box connected.
4. Connect control module. Connect a voltmeter between terminals #5 (A5) and #4 (A4).

The voltmeter should read 0.1 - 0.2 V.

1. OK Refer to «Fault-tracing information»(ref-408500-S03492456492011071200000)
2. NOT OK Refer to «Replacing mass air flow (MAF) sensor»(ref-408500-S29663740082011071200000)

1. The cause of the diagnostic trouble code (DTC) has been loose connections in the mass air flow (MAF) sensor and/or engine control module (ECM) connectors. Check connectors for contact resistance and oxidation and remedy in accordance with «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S18207218112011071200000)

Replacing mass air flow (MAF) sensor

1. Try a new mass air flow (MAF) sensor.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S18207218112011071200000)

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

1. Reconnect connectors and reinstall components.
2. ERASE DTC
3. Run the engine to operating temperature (above 80°C (176°F)).
4. Go into diagnostic test menu. Test drive the car Watch EFI-355, wait until the status of EFI-355 switches to tested. Read diagnostic trouble codes (DTCs).

EFI-355 should not be stored.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S17706950112011071200000)

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.

Scheme 725

1. Ignition off.
2. Disconnect control module. NOTE: The engine control module (ECM) must not be removed from the car until the main relay has interrupted its power supply. This may take up to 150 seconds after the ignition has been switched off. Cars with immobilizer 245 seconds. Connect adapter «9511351»(ref-403953-S10348238732011061000000) to engine control module (ECM) connector and connect breakout box «9813190»(ref-403953-S32930552542011061000000) to adapter.

1. Continue Refer to «Checking ground terminals»(ref-408500-S33133579322011071200000)

Scheme 726

1. Ignition off.
2. Switch off all equipment that takes power from the battery (courtesy lighting, radio etc.). Connect an ohmmeter between the battery negative terminal and: #13 (#A13) on the breakout box. #28 (#28) on the breakout box. #42 (#A42) on the breakout box.

The ohmmeter should read approximately 0 ohms for all readings.

1. OK Refer to «Checking the signal cable»(ref-408500-S09168745012011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S32161841972011071200000)

1. Check ground terminal 31/71 on the right side member and cables to this for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) and contact resistance and oxidation according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
2. Check ground lead between engine and chassis for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) and contact resistance and oxidation according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S10922430952011071200000)

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

1. Ignition off.
2. Control module disconnected.
3. Switch off all equipment that takes power from the battery (courtesy lighting, radio etc.). Connect an ohmmeter between battery negative terminal and #13/#28/#42 on the breakout box.

The ohmmeter should read approximately 0 ohms for all readings.

1. OK Refer to «Checking the signal cable»(ref-408500-S09168745012011071200000)
2. NOT OK Refer to «Information»(ref-408500-S27370816572011071200000)

The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.

Complete the fault-tracing for those fault or try again.

See Faulty signal

EFI-411: Throttle position (TP) sensor, signal

Condition

Diagnostic trouble code (DTC) EFI-411 is stored if the engine control module (ECM) receives a signal from the throttle position (TP) sensor corresponding to a throttle angle of less than -3.3° (0.1 V) (signal too low) or greater than 100.1° (4.9 V) (signal too high).

Substitute Value

1. idle air trim disabled
2. throttle angle set at 32.2°
3. the engine control module (ECM) uses the mass air flow (MAF) sensor signal to determine idling position
4. the engine control module (ECM) uses the mass air flow (MAF) sensor signal and engine speed (RPM) to determine full-load position
5. leakage diagnostic is disabled
6. pulsed secondary air injection (PAIR) diagnostic disabled.

Possible Source

Signal too high

1. short-circuit to supply voltage in power or signal cable
2. open-circuit in signal cable or ground lead
3. contact resistance in terminals
4. defective throttle position (TP) sensor.

Signal too low

1. short-circuit to ground in power or signal cable
2. open-circuit in power cable
3. contact resistance in terminals
4. defective throttle position (TP) sensor.

Fault symptom[s]

1. car feels sluggish
2. high idling speed in neutral.

EFI-411 Throttle position (TP) sensor signal

1. Ignition off.
2. Disconnect throttle position (TP) sensor.
3. Ignition on. Connect a voltmeter between throttle position (TP) sensor connector terminal 2 and ground.

The voltmeter should read approximately 5 V.

1. OK Refer to «Checking cables and terminals»(ref-408500-S18947059002011071200000)
2. NOT OK Refer to «Checking for a short-circuit»(ref-408500-S05194940132011071200000)

1. Check cable between throttle position (TP) sensor terminal 2 and engine control module (ECM) #A15 for a short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Information»(ref-408500-S32040919902011071200000)

1. Check throttle position (TP) sensor and engine control module (ECM) connectors for loose connections according to «Loose connections (terminals)»(ref-408435-S33351084802011071200000) and contact resistance and oxidation according to «Contact resistance and oxidation»(ref-408435-S41703021522011071200000) .
2. Check cable between throttle position (TP) sensor terminal 3 and control module #A16 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) , and an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .
3. Check cable between throttle position (TP) sensor terminal 1 and engine control module (ECM) #A18 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Information»(ref-408500-S32040919902011071200000)

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).

EFI-411 Throttle position (TP) sensor signal

1. Ignition off.
2. Wait for approximately 150 seconds (cars with immobilizer 245 seconds).
3. Disconnect throttle position (TP) sensor. NOTE: If the engine cooling fan runs on, it must be allowed to stop before taking resistance readings. Connect an ohmmeter between throttle position (TP) sensor connector terminal 1 and ground.

The ohmmeter should read approximately 0 ohms.

1. OK Refer to «Checking power cable»(ref-408500-S24537106192011071200000)
2. NOT OK Refer to «Checking control module connector»(ref-408500-S28895967962011071200000)

1. Ignition off.
2. Throttle position (TP) sensor disconnected.
3. Check control module connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
4. Control module connected. Connect an ohmmeter between throttle position (TP) sensor connector terminal 1 and ground.

The ohmmeter should read approximately 0 ohms.

1. OK Refer to «Fault-tracing information»(ref-408500-S37302093212011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S22634460512011071200000)

The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.

1. Continue Refer to «Verification»(ref-408500-S10537404012011071200000)

1. Check cable between throttle position (TP) sensor terminal 1 and engine control module (ECM) #A18 for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S10537404012011071200000)

1. Ignition on.
2. Throttle position (TP) sensor disconnected. Connect a voltmeter between throttle position (TP) sensor connector terminal 2 and ground.

The voltmeter should read approximately 5 V.

1. OK Refer to «Checking the signal cable»(ref-408500-S34690603942011071200000)
2. NOT OK Refer to «Checking for a short-circuit»(ref-408500-S15398757342011071200000)

1. Check cable between throttle position (TP) sensor terminal 2 and engine control module (ECM) #A15 for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-408435-S39443934942011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S10537404012011071200000)

1. Ignition on.
2. Throttle position (TP) sensor disconnected. Connect a voltmeter between throttle position (TP) sensor connector terminal 3 and ground.

The voltmeter should read approximately 5 V.

1. OK Refer to «Checking throttle position (TP) sensor signal»(ref-408500-S30364088362011071200000)
2. LOW Refer to «Checking control module connector»(ref-408500-S42680587472011071200000)
3. HIGH Refer to «Checking for a short-circuit»(ref-408500-S16212696742011071200000)

1. Check cable between throttle position (TP) sensor terminal 3 and control module #A16 for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-408435-S39443934942011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Checking the throttle position TP sensor»(ref-408500-S14743697002011071200000)

1. Ignition off.
2. Throttle position (TP) sensor disconnected.
3. Check control module connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000)
4. Control module connected.
5. Ignition on. Connect a voltmeter between throttle position (TP) sensor connector terminal 3 and ground.

The voltmeter should read approximately 5 V.

1. OK Refer to «Fault-tracing information»(ref-408500-S35143779992011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S20458243902011071200000)

1. The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.
2. Check connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

1. Continue Refer to «Verification»(ref-408500-S10537404012011071200000)

1. Check cable between throttle position (TP) sensor terminal 3 and control module #A16 for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S10537404012011071200000)

1. Ignition off.
2. Connect throttle position (TP) sensor.
3. Start the engine and idle it.
4. Select Volvo Scan Tool (ST) to read off the throttle angle.

The throttle angle should be 0° when the engine is idling and should increase as the accelerator pedal (AP) is depressed.

1. OK Refer to «Checking for contact resistance and oxidation»(ref-408500-S24651257572011071200000)
2. NOT OK Refer to «Replacing throttle position (TP) sensor»(ref-408500-S09725316462011071200000)

The cause of the diagnostic trouble code (DTC) has been loose connections in the throttle position (TP) sensor connector.

1. Check connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S10537404012011071200000)

1. Try a new throttle position (TP) sensor.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S10537404012011071200000)

Checking the throttle position TP sensor

1. The throttle position (TP) sensor may fail if there has been a short-circuit to supply voltage in the signal cable. Check throttle position (TP) sensor as follows.
2. Ignition off.
3. Connect throttle position (TP) sensor.
4. Start the engine and idle it.
5. Select Volvo Scan Tool (ST) to read off the throttle angle.

The throttle angle should be 0° when the engine is idling and should increase as the accelerator pedal (AP) is depressed.

1. OK Refer to «Fault-tracing information»(ref-408500-S01446549142011071200000)
2. NOT OK Refer to «Replacing throttle position (TP) sensor»(ref-408500-S29654987832011071200000)

Throttle position (TP) sensor is OK.

1. Try a new throttle position (TP) sensor.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S10537404012011071200000)

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

1. Ignition off.
2. Throttle position (TP) sensor and engine control module (ECM) connected.
3. Ignition on.
4. Select Volvo Scan Tool (ST) to read off the value of the throttle position (TP) sensor.

At closed throttle position (CTP) voltage should exceed 0.1 V, at wide open throttle (WOT) voltage should be below 4.9 V.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S17619530222011071200000)

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.

EFI-411 Throttle position (TP) sensor signal

1. Check throttle position (TP) sensor and engine control module (ECM) connectors for loose connections according to «Loose connections (terminals)»(ref-408435-S33351084802011071200000) and contact resistance and oxidation according to «Contact resistance and oxidation»(ref-408435-S41703021522011071200000) .
2. Check cable between throttle position (TP) sensor terminal 3 and control module #A16 for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) .
3. Check cable between throttle position (TP) sensor terminal 2 and engine control module (ECM) #A15 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) , and an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Information»(ref-408500-S04629523632011071200000)

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).

EFI-411 Throttle position (TP) sensor signal

1. Ignition off.
2. Wait approximately 150 seconds (car with immobilizer 245 seconds).
3. Disconnect throttle position (TP) sensor. NOTE: If the engine cooling fan runs on, it must be allowed to stop before taking resistance readings. Connect an ohmmeter between throttle position (TP) sensor connector terminal 2 and ground.

The ohmmeter should read 0.4 - 0.8 kohms.

1. OK Refer to «Checking the signal cable»(ref-408500-S31624316762011071200000)
2. LOW Refer to «Checking for a short-circuit»(ref-408500-S42647538382011071200000)
3. HIGH Refer to «Checking control module connector»(ref-408500-S00265172702011071200000)

1. Check cable between throttle position (TP) sensor terminal 2 and engine control module (ECM) #A15 for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-408435-S41115456742011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S40641416712011071200000)

1. Ignition off.
2. Throttle position (TP) sensor disconnected.
3. Check control module connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000)
4. Control module connected.
5. Ignition on. Connect a voltmeter between throttle position (TP) sensor connector terminal 2 and ground.

The voltmeter should read approximately 5 V.

1. OK Refer to «Fault-tracing information»(ref-408500-S12222670852011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S29002833592011071200000)

The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.

1. Check cable between throttle position (TP) sensor terminal 2 and engine control module (ECM) #A15 for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S40641416712011071200000)

1. Ignition on.
2. Throttle position (TP) sensor disconnected. Connect a voltmeter between throttle position (TP) sensor connector terminal 3 and ground.

The voltmeter should read approximately 5 V.

1. OK Refer to «Checking throttle position (TP) sensor signal»(ref-408500-S01470586072011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S21176500122011071200000)

1. Check cable between throttle position (TP) sensor terminal 3 and control module #A16 for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-408435-S41115456742011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S40641416712011071200000)

1. Ignition off.
2. Connect throttle position (TP) sensor.
3. Start engine.
4. Select Volvo Scan Tool (ST) to read off the throttle angle.

The throttle angle should be 0° when the engine is idling and should increase as the accelerator pedal (AP) is depressed.

1. OK Refer to «Checking for contact resistance and oxidation»(ref-408500-S24667557272011071200000)
2. NOT OK Refer to «Replacing throttle position (TP) sensor»(ref-408500-S24511595112011071200000)

The cause of the diagnostic trouble code (DTC) has been loose connections in the throttle position (TP) sensor connector.

1. Check connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S40641416712011071200000)

1. Try a new throttle position (TP) sensor.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S40641416712011071200000)

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

1. Ignition off.
2. Throttle position (TP) sensor and engine control module (ECM) connected.
3. Ignition on.
4. Select Volvo Scan Tool (ST) to read off the value of the throttle position (TP) sensor.

At closed throttle position (CTP) voltage should exceed 0.1 V, at wide open throttle (WOT) voltage should be below 4.9 V.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S15092046612011071200000)

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.

EFI-414 Boost pressure control

Scheme 727

1. Ignition on.
2. Mass air flow (MAF) sensor connected. Connect a voltmeter between mass air flow (MAF) sensor connector terminals 2 and 4.

The voltmeter should read 0.1 - 0.2 V.

1. OK Refer to «Connecting the breakout box»(ref-408500-S37478783992011071200000)
2. NOT OK Refer to «Checking the connectors»(ref-408500-S40688563302011071200000)

Checking the connectors

1. Ignition off.
2. Check mass air flow (MAF) sensor and control module connectors for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
3. Mass air flow (MAF) sensor connected.
4. Control module connected.
5. Ignition on. Connect a voltmeter between mass air flow (MAF) sensor connector terminals 2 and 4.

The voltmeter should read 0.1 - 0.2 V.

1. OK Refer to «Fault-tracing information»(ref-408500-S12522740192011071200000)
2. NOT OK Refer to «Replacing mass air flow (MAF) sensor»(ref-408500-S39612514632011071200000)

The source of the diagnostic trouble code (DTC) has been loose connections in the mass air flow (MAF) sensor and/or the engine control module (ECM) connector.

1. Continue Refer to «Verification»(ref-408500-S00120028572011071200000)

Try a new mass air flow (MAF) sensor.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S00120028572011071200000)

Check cable for boost pressure reduction

1. Disconnect control module.
2. Ignition on. Connect a voltmeter between connector #42 (#B42) on the breakout box and ground.

The voltmeter should read battery voltage.

1. OK Refer to «Checking the connectors»(ref-408500-S24267987692011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S15808802512011071200000)

Check cable between Motronic engine control module (ECM) #B42 and transmission control module (TCM) #B1 for an intermittent open-circuit according to Open-circuit, intermittent faults .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S00120028572011071200000)

1. Ignition off.
2. Check turbocharger (TC) control valve and engine control module (ECM) connectors for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
3. Turbocharger (TC) control valve connected.
4. Control module connected.
5. Ignition on. Select Volvo Scan Tool (ST) to activate turbocharger (TC) control valve.

Is the turbocharger (TC) control valve working (synchronizing)?

1. YES Refer to «Checking hoses»(ref-408500-S42557869012011071200000)
2. NO Refer to «Replacing turbocharger (TC) control valve»(ref-408500-S28752909972011071200000)

Replacing turbocharger (TC) control valve

Try a new turbocharger (TC) control valve.

Scheme 728

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S00120028572011071200000)

Scheme 729

1. Ignition off. Check that the hose between the turbocharger (TC) and turbocharger (TC) control valve, and the hose between the turbocharger (TC) control valve and pressure servo to the boost pressure control (BPC) valve are not blocked or pinched. Check that the turbocharger (TC) control valve is not blocked between the red and yellow connections (when the valve is not active it should be open between the red and yellow connections).

Are the hoses and turbocharger (TC) control valve OK?

1. YES Refer to «Checking pressure servo»(ref-408500-S22839347972011071200000)
2. NO Refer to «Fault-tracing information»(ref-408500-S30329354762011071200000)

Clean, replace if necessary.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S00120028572011071200000)

Scheme 730

1. Ignition off.
2. Disconnect the hose from the pressure servo.
3. Connect manometer «9995230»(ref-403953-S08208420282011061000000) and pressure tester «9995496»(ref-403953-S03516353332011061000000) to pressure servo.
4. Pump up a pressure of approximately 75 kPa.
5. The pressure servo should open fully at this pressure. NOTE: This pressure is not a default value. Check that the boost pressure control (BPC) valve is not sticking.

Is the pressure servo OK?

1. YES Refer to «Verification»(ref-408500-S00120028572011071200000)
2. NO Refer to «Replacing pressure servo»(ref-408500-S34773685352011071200000)

Replacing pressure servo

Try a new pressure servo according to Replacing boost pressure control (BPC) valve pressure servo .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S00120028572011071200000)

Connecting breakout box to connector B (gray)

1. Ignition off.
2. Disconnect control module. NOTE: The engine control module (ECM) must not be removed from the car until the main relay has interrupted its power supply. This may take up to 150 seconds after the ignition has been switched off. Cars with immobilizer 245 seconds. Connect adapter «9511351»(ref-403953-S10348238732011061000000) to engine control module (ECM) connector and connect breakout box «9813190»(ref-403953-S32930552542011061000000) to adapter.

Will the engine control module (ECM) be connected when readings are taken on connector B?

1. YES Refer to «Checking ground terminal #B28»(ref-408500-S18889853482011071200000)
2. NO Refer to «Check cable for boost pressure reduction»(ref-408500-S07154942232011071200000)

Checking ground terminal #B28

1. Ignition off.
2. Switch off all equipment that takes power from the battery (courtesy lighting, radio etc.).
3. Connect control module. Connect an ohmmeter between #28 (#B28) on the breakout box and battery positive terminal.

The ohmmeter should read approximately 0 ohms for all readings.

1. OK Refer to «Check cable for boost pressure reduction»(ref-408500-S07154942232011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S20021612462011071200000)

Check ground terminal 31/71 on the right side member and cables to this for an open-circuit according to Open-circuit, permanent faults and contact resistance and oxidation according to Contact resistance and oxidation .

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S16942026652011071200000)

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

1. Ignition off.
2. Control module disconnected.
3. Switch off all equipment that takes power from the battery (courtesy lighting, radio etc.). Connect an ohmmeter between battery negative terminal and #13/#28/#42 on the breakout box.

The ohmmeter should read approximately 0 ohms for all readings.

1. OK Refer to «Check cable for boost pressure reduction»(ref-408500-S07154942232011071200000)
2. NOT OK Refer to «Information»(ref-408500-S28631521202011071200000)

The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.

Complete the fault-tracing for those fault or try again.

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

1. Reconnect connectors and reinstall components.
2. Disconnect the Volvo Scan Tool (ST) from the VIDA station and use it in stand-alone mode.
3. Erase diagnostic trouble codes (DTCs).
4. Test drive the car.
5. Depress the accelerator pedal (AP) to the floor a few times.
6. Read off any diagnostic trouble codes (DTCs).

Diagnostic trouble code (DTC) EFI-414 should not be stored.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S05887177202011071200000)

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.

Intermittent fault

EFI-416 Boost pressure reduction from AW 50-42

1. Check cable between engine control module (ECM) #B42 and transmission control module (TCM) #B1 for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Information»(ref-408500-S22870342782011071200000)

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).

Permanent fault

EFI-416 Boost pressure reduction from AW 50-42.

1. Check cable between Motronic engine control module (ECM) #B42 and transmission control module (TCM) #B1 for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-408435-S41115456742011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Information»(ref-408500-S15523191892011071200000)

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.

EFI-422 Atmospheric pressure sensor, signal

1. Check atmospheric pressure sensor and engine control module (ECM) connectors for loose connections according to «Loose connections (terminals)»(ref-408435-S33351084802011071200000) and contact resistance and oxidation according to «Contact resistance and oxidation»(ref-408435-S41703021522011071200000) .
2. Check the cable between atmospheric pressure sensor terminal 3 and engine control module (ECM) #B22 for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) .
3. Check cable between atmospheric pressure sensor terminal 3 and engine control module (ECM) #B29 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) , and an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) .
4. Check cable between air conditioning (A/C) pressure sensor terminal 3 and engine control module (ECM) #B29 for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) .
5. Check cable between accelerometer terminal 1 and engine control module (ECM) #B1 for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) .
6. Check cable between fuel tank pressure sensor terminal 1 and engine control module (ECM) #B15 for an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Information»(ref-408500-S06071056382011071200000)

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).

EFI-422 Atmospheric pressure sensor, signal

1. Check atmospheric pressure sensor and engine control module (ECM) connectors for loose connections according to «Loose connections (terminals)»(ref-408435-S33351084802011071200000) and contact resistance and oxidation according to «Contact resistance and oxidation»(ref-408435-S41703021522011071200000) .
2. Check cable between atmospheric pressure sensor terminal 1 and engine control module (ECM) #B29 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) , an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) , and an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .
3. Check the cable between atmospheric pressure sensor terminal 3 and engine control module (ECM) #B22 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) , an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) , and an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .
4. Check cable between atmospheric pressure sensor terminal 2 and engine control module (ECM) #B28 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) .
5. The atmospheric pressure sensor power cable is connected inside the engine control module (ECM) to the air conditioning (A/C) pressure sensor, fuel tank pressure sensor and accelerometer power cables. If anything happens to any of these cables all four will be affected. Check cables between: Air conditioning (A/C) pressure sensor terminal 3 and engine control module (ECM) #B29. Tank pressure sensor terminal 1 and engine control module (ECM) #B15. Accelerometer terminal 1 and engine control module (ECM) #B1. for intermittent the short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-408435-S39443934942011071200000) and an intermittent short-circuit to ground «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Information»(ref-408500-S14212997222011071200000)

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).

EFI-422 Atmospheric pressure sensor, signal

1. The cause of the diagnostic trouble code (DTC) has been loose connections in the atmospheric pressure sensor and/or engine control module (ECM) connectors.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S23930047802011071200000)

1. Check atmospheric pressure sensor and/or engine control module (ECM) connector for loose connections according to «Loose connections (terminals)»(ref-408435-S33351084802011071200000) .
2. Check cable between atmospheric pressure sensor terminal 1 and engine control module (ECM) #B29 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) , an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) , and an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .
3. Check the cable between atmospheric pressure sensor terminal 3 and engine control module (ECM) #B22 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) , an intermittent short-circuit to ground according to «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) , and an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .
4. Check cable between atmospheric pressure sensor terminal 2 and engine control module (ECM) #B28 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) .
5. The atmospheric pressure sensor power cable is connected inside the engine control module (ECM) to the air conditioning (A/C) pressure sensor, fuel tank pressure sensor and accelerometer power cables. If anything happens to any of these cables all four will be affected. Check cables between: Air conditioning (A/C) pressure sensor terminal 3 and engine control module (ECM) #B29. Tank pressure sensor terminal 1 and engine control module (ECM) #B15. Accelerometer terminal 1 and engine control module (ECM) #B1. for intermittent the short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-408435-S39443934942011071200000) and an intermittent short-circuit to ground «Short-circuit to ground, intermittent faults»(ref-408435-S41958378622011071200000) .
6. Reinstall all components.
7. Start the engine and idle it.
8. Wait 5 minutes. Select Volvo Scan Tool (ST) to read off diagnostic trouble codes (DTCs).

If EFI-422 is stored they should have intermittent status.

1. OK Refer to «Verification»(ref-408500-S23930047802011071200000)
2. NOT OK Refer to «Checking the air conditioning (A/C) pressure sensor»(ref-408500-S18173206812011071200000)

Checking the air conditioning (A/C) pressure sensor

1. Ignition off.
2. Atmospheric pressure sensor connected.
3. Disconnect air conditioning (A/C) pressure sensor. HINT: Diagnostic trouble codes (DTCs) may be stored for the air conditioning (A/C) pressure sensor, erase codes when fault-tracing is completed.
4. Start the engine and idle it.
5. Wait 5 minutes. Select Volvo Scan Tool (ST) to read off diagnostic trouble codes (DTCs).

If EFI-422 is stored they should have intermittent status.

1. OK Refer to «Replacing air conditioning (A/C) pressure sensor»(ref-408500-S12297798892011071200000)
2. NOT OK Refer to «Checking accelerometer»(ref-408500-S06583518472011071200000)

Replacing air conditioning (A/C) pressure sensor

1. Try a new air conditioning (A/C) pressure sensor.

Scheme 731

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S23930047802011071200000)

Checking accelerometer

1. Ignition off.
2. Atmospheric pressure sensor connected.
3. Connect air conditioning (A/C) pressure sensor.
4. Disconnect accelerometer. HINT: Diagnostic trouble codes (DTCs) may be stored for the accelerometer, erase codes when fault-tracing is completed.
5. Start the engine and idle it.
6. Wait 5 minutes. Select Volvo Scan Tool (ST) to read off diagnostic trouble codes (DTCs).

If EFI-422 is stored they should have intermittent status.

1. OK Refer to «Replacing accelerometer»(ref-408500-S31366790672011071200000)
2. NOT OK Refer to «Checking fuel tank pressure sensor»(ref-408500-S38894440532011071200000)

Replacing accelerometer

1. Try a new accelerometer.

Scheme 732

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S23930047802011071200000)

Checking fuel tank pressure sensor

1. Ignition off.
2. Atmospheric pressure sensor connected.
3. Connect the accelerometer.
4. Disconnect tank pressure sensor. HINT: Diagnostic trouble codes (DTCs) may be stored for the fuel tank pressure sensor, erase codes when fault-tracing is completed.
5. Start the engine and idle it.
6. Wait 5 minutes. Select Volvo Scan Tool (ST) to read off diagnostic trouble codes (DTCs).

If EFI-422 is stored they should have intermittent status.

1. OK Refer to «Replacing accelerometer»(ref-408500-S19531562062011071200000)
2. NOT OK Refer to «Replacing atmospheric pressure sensor»(ref-408500-S16087402672011071200000)

1. Try a new accelerometer.

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S23930047802011071200000)

Replacing atmospheric pressure sensor

1. Try a new atmospheric pressure sensor.

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S23930047802011071200000)

1. Try a new air conditioning (A/C) pressure sensor.

Scheme 733

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S23930047802011071200000)

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

1. Ignition off.
2. Reconnect connectors and reinstall components.
3. Start the engine and idle it.
4. Wait for a minute. Select Volvo Scan Tool (ST) to read off diagnostic trouble codes (DTCs).

If EFI-422 is stored it should have intermittent status.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S31517197572011071200000)

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.

EFI-422 Atmospheric pressure sensor, signal

1. Check atmospheric pressure sensor and engine control module (ECM) connectors for loose connections according to «Loose connections (terminals)»(ref-408435-S33351084802011071200000) and contact resistance and oxidation according to «Contact resistance and oxidation»(ref-408435-S41703021522011071200000) .
2. Check the cable between atmospheric pressure sensor terminal 3 and engine control module (ECM) #B22 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) , and an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .
3. Check cable between atmospheric pressure sensor terminal 2 and engine control module (ECM) #B28 for an intermittent open-circuit according to «Open-circuit, intermittent faults»(ref-408435-S35973623872011071200000) .
4. Check cable between atmospheric pressure sensor terminal 1 and engine control module (ECM) #B29 for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .
5. Check cable between air conditioning (A/C) pressure sensor terminal 3 and engine control module (ECM) #B29 for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .
6. Check cable between accelerometer terminal 1 and engine control module (ECM) #B1 for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .
7. Check cable between fuel tank pressure sensor terminal 1 and engine control module (ECM) #B15 for an intermittent short-circuit to supply voltage according to «Short-circuit to supply voltage, intermittent faults»(ref-408435-S38416806462011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Information»(ref-408500-S04386987522011071200000)

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).

EFI-422 Atmospheric pressure sensor, signal

1. Ignition off.
2. Wait for approximately 150 seconds (cars with immobilizer 245 seconds).
3. Disconnect atmospheric pressure sensor (lilac connector). Connect an ohmmeter between atmospheric pressure sensor connector 2 and ground.

The ohmmeter should read approximately 0 ohms.

1. OK Refer to «Checking the signal cable»(ref-408500-S35500203342011071200000)
2. NOT OK Refer to «Checking control module connector»(ref-408500-S16591398392011071200000)

1. Ignition off.
2. Atmospheric pressure sensor disconnected.
3. Check control module connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
4. Control module connected. Connect an ohmmeter between atmospheric pressure sensor connector 2 and ground.

The ohmmeter should read approximately 0 ohms.

1. OK Refer to «Checking the signal cable»(ref-408500-S35500203342011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S07289199072011071200000)

1. Check cable between atmospheric pressure sensor terminal 2 and engine control module (ECM) #B28 for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Scheme 734

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S18198932222011071200000)

1. Ignition on.
2. Atmospheric pressure sensor disconnected. Connect an electrician's screwdriver (3 W bulb at least) between atmospheric pressure sensor connector terminal 2 and ground.

The bulb should not light.

1. OK Refer to «Checking signal cable resistance»(ref-408500-S06096398372011071200000)
2. NOT OK Refer to «Checking for a short-circuit»(ref-408500-S07980735192011071200000)

1. Check the cable between atmospheric pressure sensor terminal 3 and engine control module (ECM) #B22 for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-408435-S39443934942011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S18198932222011071200000)

Checking signal cable resistance

1. Ignition off.
2. Atmospheric pressure sensor disconnected. Connect an ohmmeter between atmospheric pressure sensor connector 3 and ground.

The ohmmeter should read less than approximately 10 kohms.

1. OK Refer to «Checking power cable»(ref-408500-S08065154812011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S04702592622011071200000)

1. Check the cable between atmospheric pressure sensor terminal 3 and engine control module (ECM) #B22 for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S18198932222011071200000)

1. Ignition on.
2. Atmospheric pressure sensor disconnected. Connect a voltmeter between atmospheric pressure sensor connector terminal 1 and ground.

The voltmeter should read approximately 5 V.

1. OK Refer to «Replacing atmospheric pressure sensor»(ref-408500-S06846553622011071200000)
2. NOT OK Refer to «Checking cables»(ref-408500-S25553092112011071200000)

1. Try a new atmospheric pressure sensor.

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S18198932222011071200000)

Checking cables

1. Ignition off.
2. Disconnect air conditioning (A/C) pressure sensor, fuel tank pressure sensor and accelerometer.
3. Atmospheric pressure sensor disconnected.
4. Ignition on. Connect a voltmeter between atmospheric pressure sensor connector terminal 1 and ground.

The voltmeter should read approximately 5 V.

1. OK Refer to «Checking fuel tank pressure sensor»(ref-408500-S19131823902011071200000)
2. NOT OK Refer to «Checking for a short-circuit»(ref-408500-S03322119312011071200000)

The atmospheric pressure sensor power cable is connected inside the engine control module (ECM) to the air conditioning (A/C) pressure sensor, fuel tank pressure sensor and accelerometer power cables.

If anything happens to any of these cables all four will be affected.

Check cables between

1. Air conditioning (A/C) pressure sensor terminal 3 and engine control module (ECM) #B29.
2. tank pressure sensor terminal 1 and engine control module (ECM) #B15.
3. Accelerometer terminal 1 and engine control module (ECM) #B1.
4. atmospheric pressure sensor terminal 1 and engine control module (ECM) #B29
5. for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-408435-S39443934942011071200000) .

Continue when the check has been made.

1. Continue Refer to «Verification»(ref-408500-S18198932222011071200000)

1. Ignition off.
2. Connect fuel tank pressure sensor.
3. Atmospheric pressure sensor, air conditioning (A/C) pressure sensor and accelerometer disconnected.
4. Ignition on. Connect a voltmeter between atmospheric pressure sensor terminal 1 and ground.

The voltmeter should read approximately 5 V.

1. OK Refer to «Checking the air conditioning (A/C) pressure sensor»(ref-408500-S26950379452011071200000)
2. NOT OK Refer to «Replacing fuel tank pressure sensor»(ref-408500-S19974962952011071200000)

Replacing fuel tank pressure sensor

1. Try a new fuel tank pressure sensor.

Scheme 735

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S18198932222011071200000)

1. Ignition off.
2. Connect air conditioning (A/C) pressure sensor.
3. Atmospheric pressure sensor and accelerometer disconnected.
4. Ignition on. Connect a voltmeter between atmospheric pressure sensor terminal 1 and ground.

The voltmeter should read approximately 5 V.

1. OK Refer to «Replacing accelerometer»(ref-408500-S41846066232011071200000)
2. NOT OK Refer to «Replacing air conditioning (A/C) pressure sensor»(ref-408500-S27144573692011071200000)

1. Try a new accelerometer.

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S18198932222011071200000)

1. Try a new air conditioning (A/C) pressure sensor.

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S18198932222011071200000)

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

1. Ignition off.
2. Reconnect connectors and reinstall components.
3. Start the engine and idle it.
4. Wait for a minute. Select Volvo Scan Tool (ST) to read off diagnostic trouble codes (DTCs).

If EFI-422 is stored it should have intermittent status.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S33920956722011071200000)

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.

EFI-422 Atmospheric pressure sensor, signal

1. Ignition off.
2. Disconnect atmospheric pressure sensor.
3. Ignition on. Connect a voltmeter between atmospheric pressure sensor connector terminal 1 and ground.

The voltmeter should read 5 V.

1. OK Refer to «Checking signal cable resistance»(ref-408500-S11731588472011071200000)
2. NOT OK Refer to «Checking power cable resistance to ground»(ref-408500-S18939140742011071200000)

1. Ignition off.
2. Wait for approximately 150 seconds (cars with immobilizer 245 seconds).
3. Atmospheric pressure sensor disconnected. Connect an ohmmeter between atmospheric pressure sensor connector 3 and ground.

The ohmmeter reading should be higher than 0.2 Mohms.

1. OK Refer to «Checking atmospheric pressure sensor»(ref-408500-S28549865562011071200000)
2. NOT OK Refer to «Checking for a short-circuit»(ref-408500-S15730922582011071200000)

1. Check the cable between atmospheric pressure sensor terminal 3 and engine control module (ECM) #B22 for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-408435-S39443934942011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S20535780892011071200000)

Checking atmospheric pressure sensor

1. Ignition off.
2. Connect atmospheric pressure sensor.
3. Start the engine and idle it. Use the Volvo Scan Tool (ST) to read off the value OF the atmospheric pressure sensor signal.

This value should be approximately 4.5 V at sea level and normal atmospheric pressure.

1. OK Refer to «Checking for contact resistance and oxidation»(ref-408500-S13733404172011071200000)
2. NOT OK Refer to «Replacing atmospheric pressure sensor»(ref-408500-S14206428352011071200000)

The cause of the diagnostic trouble code (DTC) has been loose connections in the atmospheric pressure sensor connector.

1. Check connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S20535780892011071200000)

1. Try a new atmospheric pressure sensor.

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S20535780892011071200000)

Checking power cable resistance to ground

1. Ignition off.
2. Atmospheric pressure sensor disconnected.
3. Wait for approximately 150 seconds (cars with immobilizer 245 seconds). Connect an ohmmeter between atmospheric pressure sensor connector 1 and ground.

The ohmmeter should read approximately 0.2 - 1.5 kohms.

1. OK FAULT NOT FOUND: Troubleshooting has been completed.
2. LOW Refer to «Checking accelerometer»(ref-408500-S12055263732011071200000)
3. HIGH Refer to «Checking control module connector»(ref-408500-S36622992532011071200000)

1. Ignition off.
2. Atmospheric pressure sensor disconnected.
3. Disconnect accelerometer. Connect an ohmmeter between atmospheric pressure sensor connector 1 and ground.

The ohmmeter should read approximately 0.2 - 1.5 kohms.

1. OK Refer to «Replacing accelerometer»(ref-408500-S23081252332011071200000)
2. NOT OK Refer to «Fault-tracing information»(ref-408500-S14413281152011071200000)

1. 1. The car has leak diagnostic. Refer to «Checking fuel tank pressure sensor»(ref-408500-S34619438202011071200000)
2. 2. The car does not have leak diagnostic. Refer to «Checking for a short-circuit»(ref-408500-S26251608562011071200000)

1. Try a new accelerometer.

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S20535780892011071200000)

1. Ignition off.
2. Atmospheric pressure sensor disconnected.
3. Accelerometer disconnected.
4. Disconnect fuel tank pressure sensor. Connect an ohmmeter between atmospheric pressure sensor connector 1 and ground.

The ohmmeter should read approximately 0.2 - 1.5 kohms.

1. OK Refer to «Replacing fuel tank pressure sensor»(ref-408500-S17779885662011071200000)
2. NOT OK Refer to «Checking the air conditioning (A/C) pressure sensor»(ref-408500-S25199164202011071200000)

1. Try a new fuel tank pressure sensor.

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S20535780892011071200000)

1. Ignition off.
2. Atmospheric pressure sensor, fuel tank pressure sensor and accelerometer disconnected
3. Disconnect the air conditioning (A/C) pressure sensor.
4. Ignition on. Connect ohmmeter between atmospheric pressure sensor terminal 1 and ground.

The ohmmeter should read approximately 0.2 - 1.5 kohms.

1. OK Refer to «Replacing air conditioning (A/C) pressure sensor»(ref-408500-S25322717482011071200000)
2. NOT OK Refer to «Checking for a short-circuit»(ref-408500-S26251608562011071200000)

1. Try a new air conditioning (A/C) pressure sensor.

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S20535780892011071200000)

The atmospheric pressure sensor power cable is connected inside the engine control module (ECM) to the air conditioning (A/C) pressure sensor, fuel tank pressure sensor and accelerometer power cables.

If anything happens to any of these cables all four will be affected.

Check cables between

1. Air conditioning (A/C) pressure sensor terminal 3 and engine control module (ECM) #B29.
2. Tank pressure sensor terminal 1 and engine control module (ECM) #B15.
3. Accelerometer terminal 1 and engine control module (ECM) #B1.
4. atmospheric pressure sensor terminal 1 and engine control module (ECM) #B29
5. for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-408435-S39443934942011071200000) .

Continue when the check has been made.

1. Continue Refer to «Verification»(ref-408500-S20535780892011071200000)

1. Ignition off.
2. Atmospheric pressure sensor disconnected.
3. Check control module connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
4. Control module connected. Connect an ohmmeter between atmospheric pressure sensor connector 1 and ground.

The ohmmeter should read approximately 0.2 - 1.5 kohms.

1. OK Refer to «Fault-tracing information»(ref-408500-S11286951552011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S11217704832011071200000)

1. The cause of the diagnostic trouble code (DTC) has been loose connections in the control module connector.

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S20535780892011071200000)

1. Check cable between atmospheric pressure sensor terminal 31 and engine control module (ECM) #B29 for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Verification»(ref-408500-S20535780892011071200000)

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

1. Ignition off.
2. Reconnect connectors and reinstall components.
3. Start the engine and idle it.
4. Wait for a minute. Select Volvo Scan Tool (ST) to read off diagnostic trouble codes (DTCs).

If EFI-422 is stored it should have intermittent status.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S30696788282011071200000)

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.

EFI-425: Rear heated oxygen sensor (HO2S), control

Condition

Scheme 736

The rear heated oxygen sensor (HO2S) constantly monitors the front heated oxygen sensor (HO2S), ensuring that it adjusts the short term fuel trim integrator so that it corresponds to the exhaust gas oxygen content. If the short term fuel trim integrator deviates, the rear heated oxygen sensor (HO2S) will make fine adjustments to it.

While the engine is running this adjustment can be both positive and negative. If the adjustment is only positive or negative the engine control module (ECM) interprets this as a damaged rear heated oxygen sensor (HO2S) and EFI-425 is stored.

Substitute Value

1. twin heated oxygen sensor (HO2S) control disabled.

Possible Source

1. uneven compression
2. air leakage in the intake system
3. air leakage in the exhaust system.
4. faulty fuel and residual pressure
5. defective rear heated oxygen sensor (HO2S).

Fault symptom[s]

1. none.

EFI-425 Rear heated oxygen sensor (HO2S), control

Scheme 737

1. Carry out a compression check as per «Compression test»(ref-408502-S36810950462011071200000) .

Is the compression in any cylinder incorrect?

1. YES Refer to «Fault tracing information»(ref-408500-S11493255562011071200000)
2. NO Refer to «Checking for air leakage»(ref-408500-S36063981912011071200000)

1. Rectify as necessary.

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S32478965892011071200000)

Replacing rear heated oxygen sensor (HO2S)

1. Try a new rear heated oxygen sensor (HO2S).

Scheme 738

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S32478965892011071200000)

1. Check if there is any air leakage as per «Checking intake system»(ref-438955-S17846880682011120700000) .

Is there any air leakage?

1. YES Refer to «Fault tracing information»(ref-408500-S20761516432011071200000)
2. NO Refer to «Checking for air leakage in the exhaust system»(ref-408500-S23271323892011071200000)

1. Rectify as necessary.

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S32478965892011071200000)

Scheme 739

1. Check if there is any air leakage as per «Checking exhaust system»(ref-438955-S01846064922011120700000) .

Is there any air leakage?

1. YES Refer to «Fault tracing information»(ref-408500-S20761516432011071200000)
2. NO Refer to «Check the fuel pump relay's two-stage function»(ref-408500-S08520438582011071200000)

Fuel pressure and residual pressure

Special tools

See 9812270

See 9812273

See 9812282

See 9989725

See 9995011

Scheme 740

Scheme 741

1. Ignition off.
2. Remove fuse no. 2. Connect a Fluke multimeter (or equivalent), set to measure DC, between fuse no. 2's tabs in the fuse-holder. NOTE: The VIDA station could not be used in this measurement. Start the engine.

Rev. the engine; at speeds above 3000 rpm, current consumption should be higher than at speeds below 3000 rpm.

1. OK Refer to «Checking fuel pressure and residual pressure»(ref-408500-S16655381982011071200000)
2. NOT OK Refer to «Checking full-speed»(ref-408500-S25153870222011071200000)

Scheme 742

Scheme 743

1. Ignition off.
2. Remove the cover from the central electrical unit.
3. Remove the fuel pump relay (pos. 103 in the central electrical unit)
4. Connect a lead between the relay connector 1 and 3.
5. Ignition on. Check that the fuel pump is working by gently squeezing the hose leading to the fuel pressure regulator. A slight pulsating sensation is felt if the fuel pump is working.

Is the fuel pump working?

1. YES Refer to «Checking half-speed»(ref-408500-S16004536672011071200000)
2. NO Refer to «Checking for open-circuit»(ref-408500-S23709890242011071200000)

Checking for open-circuit

1. Check the lead between the fuel pump relay connector 3 and the fuel pump connector 1 for signs of a break as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S24493816552011071200000)

Scheme 744

1. Ignition off.
2. Remove the lead linking connector 1 and 3 on the fuel pump relay connector.
3. Connect the lead between the relay coupling's connector 1 and 5.
4. Ignition on. Check that the fuel pump is working by gently squeezing the hose leading to the fuel pressure regulator. A slight pulsating sensation is felt if the pump is working.

Is the fuel pump working?

1. YES Refer to «Replacement of fuel pump relay»(ref-408500-S00804966992011071200000)
2. NO Refer to «Check the lead between the relay and the series resistance.»(ref-408500-S04843366282011071200000)

1. Check the lead between the fuel pump relay connector 5 and the series resistance, connector 2, for signs of a break as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S24493816552011071200000)

Scheme 745

1. Ignition off.
2. Series resistance disconnected. Connect an ohmmeter between the series resistance's coupling 1 and 2 (to series resistance).

The ohmmeter should show approx. 0.9 W.

1. OK Refer to «Checking for open-circuit»(ref-408500-S32697536652011071200000)
2. NOT OK Refer to «Replacement of series resistance»(ref-408500-S36357545952011071200000)

1. Check the lead between the series resistance connector 1 and fuel pump connector 1 for signs of a break as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Press Continue when fault is repaired

1. Continue Refer to «Verification»(ref-408500-S24493816552011071200000)

HINT: After repair, it is necessary to check that the fault has been corrected.

HINT: Perform as follows

1. Ignition off.
2. Reconnect connectors, components etc.
3. Remove fuse no. 2. Connect a Fluke multimeter (or equivalent), set to measure DC, between fuse no. 2's tabs in the fuse-holder. NOTE: The VIDA station could not be used in this measurement. Start the engine

Rev. the engine; at speeds above 3000 rpm, current consumption should be higher than at speeds below 3000 rpm.

1. OK OKAY: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S29415132872011071200000)

The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.

Complete the fault-tracing for those fault or try again.

Checking fuel pressure and residual pressure

Special tools

See 9812270

See 9812273

See 9812282

See 9989725

See 9995011

See 9995479

See 9995843

See 9985496

See 9995230

Choosing a method for taking a reading

It is possible to measure fuel pressure with the car stationary or while being driven. Residual pressure is measured with the car stationary.

For measurement while the car is being driven see Taking fuel pressure readings while driving the car .

1. Continue Refer to «Checking vacuum hose to pressure regulator»(ref-408500-S16146603622011071200000)

Scheme 746

1. Ignition off.
2. Remove throttle pulley cover.
3. Disconnect vacuum hose from pressure regulator. Check that the hose is not blocked by blowing into it.

Is the hose OK?

1. YES Refer to «Connect pressure gauge»(ref-408500-S12650601872011071200000)
2. NO Refer to «Checking hose and connection»(ref-408500-S10764049202011071200000)

Checking hose and connection

1. Check hose and terminal on intake manifold, clean/replace.

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S11070556772011071200000)

Scheme 747

1. Supplement pressure gauge «9995011»(ref-403953-S13051471402011061000000) with nipple «9989725»(ref-403953-S30652708112011061000000) and adapter «9995479»(ref-403953-S17462459562011061000000) before use.
2. Connect adapter to valve on fuel rail, with adapter in locked position (valve closed as in picture 1 (below)).
3. Turn pressure gauge cock so it faces adapter «9995479»(ref-403953-S17462459562011061000000) .
4. Connect other pressure gauge connector to fuel draining unit «9812270»(ref-403953-S06137301002011061000000) , «9812273»(ref-403953-S13586864282011061000000) and «9812282»(ref-403953-S26175172122011061000000) .
5. Unlock adapter (illustration 2 valve open (below)).

1. Continue Refer to «Starting fuel pump (FP)»(ref-408500-S34871684642011071200000)

Starting fuel pump (FP)

1. Remove central electrical unit cover.
2. Remove fuel pump relay (position 103 in electrical distribution unit).
3. Connect a cable between relay base terminals 1 and 3. Ignition on.

Fuel pump (FP) should operate.

1. Continue Refer to «Measuring line pressure»(ref-408500-S28914279292011071200000)

Measuring line pressure

1. Read off line pressure from pressure gauge.

Scheme 748

Line pressure should be 300 kPa (3.0 kp/cm 2).

1. OK Refer to «Checking fuel filter»(ref-408500-S16106492662011071200000)
2. LOW Refer to «Line pressure too low»(ref-408500-S35633027172011071200000)
3. HIGH Refer to «Line pressure too high»(ref-408500-S16532720882011071200000)

Scheme 749

1. Ignition off.
2. Remove the cable between the relay base terminals 1 and 3.
3. Disconnect return line from pressure regulator. Blow through the line into the fuel tank.

Is cable OK?

1. YES Refer to «Replacing pressure regulator»(ref-408500-S00708015192011071200000)
2. NO Refer to «Checking for blockage»(ref-408500-S31916151712011071200000)

Replacing pressure regulator

Try a new pressure regulator according to

1. See «Pressure regulator, replacement»(ref-408433-S03572659372011071200000) (B5202S/B5252S Fenix 5.2)
2. See «Pressure regulator, replacement»(ref-408433-S29584013312011071200000) (other engines)

Scheme 750

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S11070556772011071200000)

Checking for blockage

1. Check if there is a blockage in the return line. Clean and replace as necessary.

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S11070556772011071200000)

1. Remove central electrical unit cover.
2. Remove fuel pump relay (position 103 in electrical distribution unit).
3. Connect a cable between relay base terminals 1 and 3. Ignition on.

Fuel pump (FP) should operate.

1. Continue Refer to «Measuring line pressure»(ref-408500-S18442392542011071200000)

1. Read off line pressure from pressure gauge.

Line pressure should be 300 kPa (3.0 kp/cm 2).

1. OK Refer to «Stop fuel pump (FP)»(ref-408500-S03614121782011071200000)
2. NOT OK Refer to «Information»(ref-408500-S02549443622011071200000)

Line pressure too low

1. Squeeze the return line and check is the pressure rises.

Scheme 751

Did the pressure increase?

1. YES Refer to «Replacing pressure regulator»(ref-408500-S22133219002011071200000)
2. NO Refer to «Checking for blockage»(ref-408500-S40178747832011071200000)

Try a new pressure regulator according to

1. See «Pressure regulator, replacement»(ref-408433-S03572659372011071200000) (B5202S/B5252S Fenix 5.2)
2. See «Pressure regulator, replacement»(ref-408433-S29584013312011071200000) (other engines)

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S11070556772011071200000)

1. Check filter gauze at fuel pump (FP). If it is OK: Replace fuel pump (FP) according to «Fuel pump, replacement»(ref-408434-S03598367072011071200000)

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S11070556772011071200000)

Checking fuel filter

1. Squeeze the return line and check if pressure increases quickly or slowly.

Did the pressure increase quickly?

1. YES Refer to «Checking pressure regulator, pressure reduction»(ref-408500-S36955158262011071200000)
2. NO Refer to «Replacing fuel filter»(ref-408500-S04123144212011071200000)

Replacing fuel filter

1. Replace fuel filter according to «Fuel filter, replacement»(ref-408434-S37504734802011071200000) .

Scheme 752

Continue when the fault has been repaired.

1. Continue Refer to «Checking fuel filter»(ref-408500-S06817893692011071200000)

1. Squeeze the return line and check if pressure increases quickly or slowly.

Did the pressure increase quickly?

1. YES Refer to «Stop fuel pump (FP)»(ref-408500-S03614121782011071200000)
2. NO Refer to «Information»(ref-408500-S02549443622011071200000)

Scheme 753

1. Connect vacuum pump «9995843»(ref-403953-S06330547042011061000000) to pressure regulator.
2. Pump air out of the regulator. Check that line pressure drops by the same amount as the pressure in the regulator drops. 300 kpa - negative pressure = line pressure Disconnect the hose from the vacuum pump.

Line pressure should return to 300 kPa.

1. OK Refer to «Checking pressure regulator, pressure increase»(ref-408500-S25574032922011071200000)
2. NOT OK Refer to «Replacing pressure regulator»(ref-408500-S41082687182011071200000)

Try a new pressure regulator according to

1. See «Pressure regulator, replacement»(ref-408433-S03572659372011071200000) (B5202S/B5252S Fenix 5.2)
2. See «Pressure regulator, replacement»(ref-408433-S29584013312011071200000) (other engines)

Continue when the fault has been repaired.

1. Continue Refer to «Checking pressure regulator, pressure reduction»(ref-408500-S42625325372011071200000)

Checking pressure regulator, pressure reduction

1. Connect vacuum pump «9995843»(ref-403953-S06330547042011061000000) to pressure regulator.
2. Pump air out of the regulator. Check that line pressure drops by the same amount as the pressure in the regulator drops. 300 kpa - negative pressure = line pressure Disconnect the hose from the vacuum pump.

Line pressure should return to 300 kPa.

1. OK Refer to «Stop fuel pump (FP)»(ref-408500-S03614121782011071200000)
2. NOT OK Refer to «Information»(ref-408500-S02549443622011071200000)

Scheme 754

1. Connect pressure tester «9985496»(ref-403953-S16783487572011061000000) and pressure gauge «9995230»(ref-403953-S08208420282011061000000) to pressure regulator.
2. Pump up pressure. Check that line pressure rises by the same amount as the pressure in the regulator. 300 kpa + overpressure = line pressure. Disconnect hose from pressure tester.

Line pressure should return to 300 kPa.

1. OK Refer to «Checking residual pressure»(ref-408500-S11898940932011071200000)
2. NOT OK Refer to «Replacing pressure regulator»(ref-408500-S40864756262011071200000)

Try a new pressure regulator according to

1. See «Pressure regulator, replacement»(ref-408433-S03572659372011071200000) (B5202S/B5252S Fenix 5.2)
2. See «Pressure regulator, replacement»(ref-408433-S29584013312011071200000) (other engines)

Continue when the fault has been repaired.

1. Continue Refer to «Checking pressure regulator, pressure increase»(ref-408500-S22323390162011071200000)

Checking pressure regulator, pressure increase

1. Connect pressure tester «9985496»(ref-403953-S16783487572011061000000) and pressure gauge «9995230»(ref-403953-S08208420282011061000000) to pressure regulator.
2. Pump up pressure. Check that line pressure rises by the same amount as the pressure in the regulator. 300 kpa + overpressure = line pressure. Disconnect hose from pressure tester.

Line pressure should return to 300 kPa.

1. OK Refer to «Stop fuel pump (FP)»(ref-408500-S03614121782011071200000)
2. NOT OK Refer to «Information»(ref-408500-S02549443622011071200000)

Scheme 755

1. Ignition off.
2. Disconnect cable between relay base terminals 1 and 3.
3. Reinstall the fuel pump relay.

Line pressure must not drop below 200 kPa in less than 20 minutes.

1. OK Refer to «Disconnecting pressure gauge»(ref-408500-S35411978602011071200000)
2. NOT OK Refer to «Replacing various fuel components»(ref-408500-S41198088972011071200000)

Replacing various fuel components

1. Incorrect residual pressure readings may be due to leakage from injectors, connections, pressure regulator, fuel pump non-return valve or lines. Repair as necessary.

Continue when the fault has been repaired.

1. Continue Refer to «Checking residual pressure»(ref-408500-S02614302722011071200000)

Checking residual pressure

1. Ignition off.
2. Disconnect cable between relay base terminals 1 and 3.
3. Reinstall the fuel pump relay.

Line pressure must not drop below 200 kPa in less than 20 minutes.

1. OK Refer to «Stop fuel pump (FP)»(ref-408500-S03614121782011071200000)
2. NOT OK Refer to «Information»(ref-408500-S02549443622011071200000)

Scheme 756

1. Ignition off.
2. Start draining unit.
3. Turn pressure gauge cock to mid-position.
4. Lock adapter (valve closed as in picture 1 (below)).
5. Disconnect adapter from valve.
6. Stop draining unit.
7. Reinstall equipment. CAUTION: Remember to reinstall valve safety cap.

Stop fuel pump (FP)

1. Switch off the ignition.
2. Disconnect cable between relay base terminals 1 and 3.
3. Reinstall the fuel pump relay.

1. Continue Refer to «Disconnecting pressure gauge»(ref-408500-S19476349732011071200000)

Disconnecting pressure gauge

1. Ignition off.
2. Start draining unit.
3. Turn pressure gauge cock to mid-position.
4. Lock adapter (valve closed as in picture 1 (below)).
5. Disconnect adapter from valve.
6. Stop draining unit.
7. Reinstall equipment. CAUTION: Remember to reinstall valve safety cap.

1. Ignition off.
2. Disconnect cable between relay base terminals 1 and 3.
3. Reinstall the fuel pump relay.

1. Continue Refer to «Disconnecting pressure gauge»(ref-408500-S00106148982011071200000)

1. Ignition off.
2. Start draining unit.
3. Turn pressure gauge cock to mid-position.
4. Lock adapter (valve closed as in picture 1 (below)).
5. Disconnect adapter from valve.
6. Stop draining unit.
7. Reinstall equipment. CAUTION: Remember to reinstall valve safety cap.

Continue when the fault has been repaired.

1. Continue 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.

Connect pressure gauge

1. Supplement pressure gauge «9995011»(ref-403953-S13051471402011061000000) with nipple «9989725»(ref-403953-S30652708112011061000000) and adapter «9995479»(ref-403953-S17462459562011061000000) before use.
2. Connect adapter to valve on fuel rail, with adapter in locked position (valve closed as in picture 1 (below)).
3. Turn pressure gauge cock so it faces adapter «9995479»(ref-403953-S17462459562011061000000) .
4. Connect other pressure gauge connector to fuel draining unit «9812270»(ref-403953-S06137301002011061000000) , «9812273»(ref-403953-S13586864282011061000000) and «9812282»(ref-403953-S26175172122011061000000) .
5. Unlock adapter (illustration 2 valve open (below)).

1. Continue Refer to «Starting fuel pump (FP)»(ref-408500-S22030479432011071200000)

Start fuel pump, check fuel filter

1. Connect jumper lead across relay base terminals 1 and 3. Switch on ignition.

Fuel pump should run.

1. Continue Refer to «Checking fuel filter»(ref-408500-S08099966302011071200000)

The previous test indicates that a repair must be made before continuing with fault-tracing. You cannot proceed with the fault-tracing tests at this point.

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

1. Ignition off.
2. Front and rear heated oxygen sensors (HO2S) connected.
3. Disconnect the Volvo Scan Tool (ST) from the VIDA station and use it in stand-alone mode.
4. Start the engine and idle it.
5. Go into the Diagnostic Test Mode (DTM) menu.
6. Watch EFI-425, wait until the status of EFI-425 switches to tested. This can take up to 15 minutes after the engine has been started.
7. Read off diagnostic trouble codes (DTCs).

If EFI-425 is stored they should have intermittent status.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S39651319032011071200000)

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.

Stop fuel pump, check for blockage

1. Switch off ignition.
2. Disconnect jumper lead between relay base terminals 1 and 3.

1. Continue Refer to «Checking for blockage»(ref-408500-S20851100542011071200000)

1. Switch off ignition.
2. Disconnect jumper lead between relay base terminals 1 and 3.

1. Continue Refer to «Checking for blockage»(ref-408500-S30713545282011071200000)

Start fuel pump, check pressure regulator - pressure reduction

1. Connect jumper lead across relay base terminals 1 and 3. Switch on ignition.

Fuel pump should run.

1. Continue Refer to «Checking pressure regulator, pressure reduction»(ref-408500-S36674779662011071200000)

Start fuel pump, check pressure regulator - pressure increase

1. Connect jumper lead across relay base terminals 1 and 3. Switch on ignition.

Fuel pump should run.

1. Continue Refer to «Checking pressure regulator, pressure increase»(ref-408500-S17830872692011071200000)

Start fuel pump, check residual pressure

1. Connect jumper lead across relay base terminals 1 and 3. Switch on ignition.

Fuel pump should run.

1. Continue Refer to «Checking residual pressure»(ref-408500-S25595604112011071200000)

The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.

Complete the fault-tracing for those fault or try again.

EFI-432: Temperature warning >100°CEFI-513 Temperature warning >110°C

Condition

Scheme 757

Diagnostic trouble code (DTC) EFI-432

1. diagnostic trouble code (DTC) EFI-432 is stored if the temperature in the control module exceeds +100°C.

Diagnostic trouble code (DTC) EFI-513

1. diagnostic trouble code (DTC) EFI-513 is stored in addition to diagnostic trouble code (DTC) EFI-432 if temperature in the control module exceeds +110°C.

Substitute Value

1. the engine cooling fan (FC) starts running at low-speed

Possible Source

1. engine cooling fan (FC) does not work
2. air supply blocked.

Fault symptom[s]

1. none.

EFI-432, EFI-513 Temperature warning levels 1 and 2

Checking engine cooling fan (FC)

1. Select Volvo Scan Tool (ST) to activate engine cooling fan (FC).
2. Check that the engine cooling fan (FC) is working and that air is sucked into the control module box air hose connector on the fan shroud.

Scheme 758

Is the engine cooling fan (FC) working and is air sucked into the hose connector?

1. YES Refer to «Checking air supply»(ref-408500-S20860260162011071200000)
2. NO Refer to «Signal too high. Permanent fault»(ref-408500-S28556168132011071200000)

Scheme 759

Scheme 760

1. Ignition on.
2. Blower fan on highest speed.
3. Close the dashboard air vents.

Check that a gentle stream of air is being blown out of the control module box air hose.

1. OK Refer to «Fault-tracing information»(ref-408500-S29838267092011071200000)
2. NOT OK Refer to «Replacing hoses and hose connectors»(ref-408500-S09944649262011071200000)

1. Control module box cooling is working. Select Volvo Scan Tool (ST) to erase diagnostic trouble code (DTC).

Replacing hoses and hose connectors

1. Check that hoses and hose connectors are in place, are not blocked and are correctly connected. Clean or replace defective components.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S30456437542011071200000)

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

1. Ignition on.
2. Blower fan on highest speed.
3. Close the dashboard air vents.

Check that a gentle stream of air is being blown out of the control module box air hose.

1. OK OKAY: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S23388937742011071200000)

EFI-514 Engine cooling fan (FC) low-speed, signal

Scheme 761

1. Ignition off.
2. Disconnect engine cooling fan (FC) relay connector B.
3. Ignition on. Connect a voltmeter between relay connector B terminal 1 (engine control module (ECM) side) and ground.

The voltmeter should read approximately 6 V.

1. OK Refer to «Replacing engine cooling fan (FC) relay»(ref-408500-S24022172642011071200000)
2. NOT OK Refer to «Checking for a short-circuit»(ref-408500-S36897355552011071200000)

Replacing engine cooling fan (FC) relay

1. Try a new engine cooling fan (FC) relay.

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S04227819042011071200000)

1. Check cable between engine cooling fan (FC) relay terminal B1 and engine control module (ECM) #A7 for a short-circuit to supply voltage according to «Short-circuit to supply voltage. Permanent faults»(ref-408435-S39443934942011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S04227819042011071200000)

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

1. Ignition off.
2. Engine cooling fan (FC) relay and engine control module (ECM) connected.
3. Ignition on. Select Volvo Scan Tool (ST) to activate the engine cooling fan (FC) (low-speed).

The engine cooling fan (FC) should run at low-speed.

1. OK Refer to «Verification, continued»(ref-408500-S28332846652011071200000)
2. NOT OK Refer to «Information»(ref-408500-S23388937742011071200000)

Verification, continued

1. Ignition on. Select Volvo Scan Tool (ST) to activate the engine cooling fan (FC) (high-speed).

The engine cooling fan (FC) should run at high-speed.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S23388937742011071200000)

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.

5-1-4 Engine cooling fan (FC) low-speed signal

1. Ignition off.
2. Disconnect connector A from fan control (FC) relay. Connect a voltmeter between relay connector A (engine control module (ECM) side) and ground.

The voltmeter should read battery voltage.

1. OK Refer to «Checking the signal cable, half speed»(ref-408500-S09434785382011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S04964922622011071200000)

1. There is an integrated fusible link between the starter motor and relay. If there is an open-circuit in this cable there is probably a short-circuit to ground in the circuit which caused the open-circuit. So check the relay and engine coolant fan (FC) motor before replacing the cable according to «Replacing engine cooling fan (FC) fusible link cable»(ref-408449-S18133508732011071200000) . Check cable between starter motor and engine cooling fan (FC) relay terminal A1 for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verify»(ref-408500-S16139373712011071200000)

Checking the signal cable, half speed

1. Ignition off.
2. Connector A disconnected.
3. Disconnect engine cooling fan (FC) relay connector B. Connect an ohmmeter between relay connector B terminal 1 (engine control module (ECM) side) and ground.

The ohmmeter should read 28 - 38 kohms.

1. OK Refer to «Checking signal cable, high-speed»(ref-408500-S31038833062011071200000)
2. LOW Refer to «Checking for a short-circuit»(ref-408500-S37459482142011071200000)
3. HIGH Refer to «Checking control module connector»(ref-408500-S08286221652011071200000)

1. Check cable between engine cooling fan (FC) relay terminal B1 and engine control module (ECM) #A7 for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-408435-S41115456742011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verify»(ref-408500-S16139373712011071200000)

Scheme 762

1. Ignition off.
2. Connectors A and B disconnected.
3. Check control module connector for contact resistance and oxidation and remedy according to «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .
4. Control module connected. Connect an ohmmeter between relay connector B terminal 1 (engine control module (ECM) side) and ground.

The ohmmeter should read 28 - 38 kohms.

1. OK Refer to «Checking control module number»(ref-408500-S41911371602011071200000)
2. NOT OK Refer to «Checking for an open-circuit»(ref-408500-S07007225752011071200000)

1. Check cable between engine cooling fan (FC) relay terminal B1 and engine control module (ECM) #A7 for an open-circuit according to «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verify»(ref-408500-S16139373712011071200000)

Checking signal cable, high-speed

1. Ignition off.
2. Connectors A and B disconnected. Connect an ohmmeter between relay connector B terminal 2 (engine control module (ECM) side) and ground.

The ohmmeter should read 100 kohms- infinite resistance.

1. OK Refer to «Checking control module number»(ref-408500-S41911371602011071200000)
2. NOT OK Refer to «Checking for a short-circuit»(ref-408500-S15238193982011071200000)

1. Check cable between engine cooling fan (FC) relay connector B2 and engine control module (ECM) #A22 for a short-circuit to ground according to «Short-circuit to ground, permanent faults»(ref-408435-S41115456742011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verify»(ref-408500-S16139373712011071200000)

Checking engine cooling fan (FC) relay

1. Ignition off.
2. Connect connectors A and B to engine cooling fan (FC) relay.
3. Start the engine and idle it. Read off diagnostic trouble code (DTC) status message.

Is the diagnostic trouble code (DTC) still permanent?

1. YES Refer to «Replacing engine cooling fan (FC) relay»(ref-408500-S34650045102011071200000)
2. NO Refer to «Checking for contact resistance and oxidation»(ref-408500-S09062580662011071200000)

1. Ignition off.
2. Connect connectors A and B to engine cooling fan (FC) relay.
3. Start the engine and idle it. Read off diagnostic trouble code (DTC) status message.

Is the diagnostic trouble code (DTC) still permanent?

1. YES Refer to «Replacing engine cooling fan (FC) relay»(ref-408500-S34650045102011071200000)
2. NO Refer to «Checking for contact resistance and oxidation»(ref-408500-S09062580662011071200000)

1. Try a new engine cooling fan (FC) relay.

Continue when the fault has been remedied.

1. Continue Refer to «Verify»(ref-408500-S16139373712011071200000)

The cause of the diagnostic trouble code (DTC) has been loose connections in the engine cooling fan (FC) relay and/or control module connectors.

1. Check connectors for contact resistance and oxidation and remedy in accordance with «Contact resistance and oxidation»(ref-408435-S11196285822011071200000) .

Continue when the fault has been remedied.

1. Continue Refer to «Verify»(ref-408500-S16139373712011071200000)

Checking control module number

1. Start the engine and idle it. P/N for engine control modules with immobilizer 1275002 1275232 1275003 1275004 9125330 1275679 1275678 9125329 1270544 1275553 1275554 Select Volvo Scan Tool (ST) symbol to read off control module P/N. If the engine control module (ECM) has any of the above P/Ns (first seven digits) it is equipped with an immobilizer.

Is the car with a immobilizer?

1. YES Refer to «Checking engine cooling fan (FC) relay»(ref-408500-S40134793232011071200000)
2. NO Refer to «Checking engine cooling fan (FC) relay»(ref-408500-S18006677812011071200000)

HINT: After repair, it is necessary to check that the fault has been corrected.

HINT: Perform as described below

1. Ignition off.
2. Reconnect connectors, components etc.
3. Ignition on. Select VST symbol to activate DTM 3. For information on DTM 3 sequence, see «Diagnostic test mode (DTM) 3»(ref-438955-S09157600232011120700000) .

Fan should run at both half and full speed during DTM 3.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S15427889602011071200000)

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

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

See Faulty signal. Intermittent fault

See Faulty signal. Permanent fault

EFI-435: Front heated oxygen sensor (HO2S) too slow

Condition

The engine control module (ECM) continuously monitors the time (period 3.3 seconds) it takes for the HO2S to switch from rich to lean and back to rich again. If this time is too long, the engine control module (ECM) interprets this as a fault in the front heated oxygen sensor (HO2S) and diagnostic trouble code (DTC) EFI-435 is stored.

Substitute Value

1. twin heated oxygen sensor (HO2S) control disabled
2. pulsed secondary air injection (PAIR) diagnostic disabled.

Possible Source

1. uneven compression
2. air leakage in the intake system
3. air leakage in the exhaust system
4. faulty fuel pressure
5. defective front heated oxygen sensor (HO2S).

Fault symptom[s]

1. may result in poor performance.

EFI-435 Front heated oxygen sensor (HO2S) too slow

Checking the compression

1. Carry out a compression check as per «Compression test»(ref-408502-S36810950462011071200000) .

Is the compression in any cylinder incorrect?

1. YES Refer to «Fault tracing information»(ref-408500-S21350738792011071200000)
2. NO Refer to «Checking for air leakage»(ref-408500-S07028813902011071200000)

1. Rectify as necessary.

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S14978961972011071200000)

Checking fuel and residual pressures

1. Check fuel and residual pressure according to «Fuel pressure and residual pressure»(ref-408500-S15670565552011071200000) .

Are fuel and residual pressures OK?

Replacing front heated oxygen sensor (HO2S)

1. Try a new front heated oxygen sensor (HO2S).

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S14978961972011071200000)

1. Check if there is any air leakage as per «Checking intake system»(ref-438955-S17846880682011120700000) .

Is there any air leakage?

1. YES Refer to «Fault tracing information»(ref-408500-S06373680842011071200000)
2. NO Refer to «Checking for air leakage in the exhaust system»(ref-408500-S12308262912011071200000)

1. Rectify as necessary.

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S14978961972011071200000)

Checking for air leakage in the exhaust system

1. Check if there is any air leakage as per «Checking exhaust system»(ref-438955-S01846064922011120700000) .

Is there any air leakage?

1. YES Refer to «Fault tracing information»(ref-408500-S06373680842011071200000)
2. NO Refer to «Check the fuel pump relay's two-stage function»(ref-408500-S27520104972011071200000)

Special tools

See 9812270

See 9812273

See 9812282

See 9989725

See 9995011

Check the fuel pump relay's two-stage function

1. Ignition off.
2. Remove fuse no. 2. Connect a Fluke multimeter (or equivalent), set to measure DC, between fuse no. 2's tabs in the fuse-holder. NOTE: The VIDA station could not be used in this measurement. Start the engine.

Rev. the engine; at speeds above 3000 rpm, current consumption should be higher than at speeds below 3000 rpm.

1. OK Refer to «Checking fuel pressure and residual pressure»(ref-408500-S33152315592011071200000)
2. NOT OK Refer to «Checking full-speed»(ref-408500-S10123902302011071200000)

Checking full-speed

1. Ignition off.
2. Remove the cover from the central electrical unit.
3. Remove the fuel pump relay (pos. 103 in the central electrical unit)
4. Connect a lead between the relay connector 1 and 3.
5. Ignition on. Check that the fuel pump is working by gently squeezing the hose leading to the fuel pressure regulator. A slight pulsating sensation is felt if the fuel pump is working.

Is the fuel pump working?

1. YES Refer to «Checking half-speed»(ref-408500-S15940027182011071200000)
2. NO Refer to «Checking for open-circuit»(ref-408500-S34604212822011071200000)

1. Check the lead between the fuel pump relay connector 3 and the fuel pump connector 1 for signs of a break as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S18329649632011071200000)

Checking half-speed

1. Ignition off.
2. Remove the lead linking connector 1 and 3 on the fuel pump relay connector.
3. Connect the lead between the relay coupling's connector 1 and 5.
4. Ignition on. Check that the fuel pump is working by gently squeezing the hose leading to the fuel pressure regulator. A slight pulsating sensation is felt if the pump is working.

Is the fuel pump working?

1. YES Refer to «Replacement of fuel pump relay»(ref-408500-S21059908112011071200000)
2. NO Refer to «Check the lead between the relay and the series resistance.»(ref-408500-S17803644622011071200000)

Check the lead between the relay and the series resistance.

1. Ignition off.
2. Remove the windshield wiper arms.
3. Remove the plenum cover.
4. Disconnect the series resistance.
5. Connect the lead between relay coupling connectors 1 and 5.
6. Ignition on. Connect a voltmeter between the series resistance's connector 2 (to fuel pump relay) and ground.

The voltmeter should show battery voltage.

1. OK Refer to «Check the series resistance»(ref-408500-S34892832942011071200000)
2. NOT OK Refer to «Checking for open-circuit»(ref-408500-S13631569312011071200000)

1. Check the lead between the fuel pump relay connector 5 and the series resistance, connector 2, for signs of a break as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S18329649632011071200000)

Check the series resistance

1. Ignition off.
2. Series resistance disconnected. Connect an ohmmeter between the series resistance's coupling 1 and 2 (to series resistance).

The ohmmeter should show approx. 0.9 W.

1. OK Refer to «Checking for open-circuit»(ref-408500-S38442379602011071200000)
2. NOT OK Refer to «Replacement of series resistance»(ref-408500-S25417507672011071200000)

1. Check the lead between the series resistance connector 1 and fuel pump connector 1 for signs of a break as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Press Continue when fault is repaired

1. Continue Refer to «Verification»(ref-408500-S18329649632011071200000)

HINT: After repair, it is necessary to check that the fault has been corrected.

HINT: Perform as follows

1. Ignition off.
2. Reconnect connectors, components etc.
3. Remove fuse no. 2. Connect a Fluke multimeter (or equivalent), set to measure DC, between fuse no. 2's tabs in the fuse-holder. NOTE: The VIDA station could not be used in this measurement. Start the engine

Rev. the engine; at speeds above 3000 rpm, current consumption should be higher than at speeds below 3000 rpm.

1. OK OKAY: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S18418413502011071200000)

The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.

Complete the fault-tracing for those fault or try again.

Special tools

See 9812270

See 9812273

See 9812282

See 9989725

See 9995011

See 9995479

See 9995843

See 9985496

See 9995230

It is possible to measure fuel pressure with the car stationary or while being driven. Residual pressure is measured with the car stationary.

For measurement while the car is being driven see Taking fuel pressure readings while driving the car .

1. Continue Refer to «Checking vacuum hose to pressure regulator»(ref-408500-S08400795652011071200000)

Checking vacuum hose to pressure regulator

1. Ignition off.
2. Remove throttle pulley cover.
3. Disconnect vacuum hose from pressure regulator. Check that the hose is not blocked by blowing into it.

Is the hose OK?

1. YES Refer to «Connect pressure gauge»(ref-408500-S19347609552011071200000)
2. NO Refer to «Checking hose and connection»(ref-408500-S12238601252011071200000)

1. Check hose and terminal on intake manifold, clean/replace.

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S19645255352011071200000)

1. Supplement pressure gauge «9995011»(ref-403953-S13051471402011061000000) with nipple «9989725»(ref-403953-S30652708112011061000000) and adapter «9995479»(ref-403953-S17462459562011061000000) before use.
2. Connect adapter to valve on fuel rail, with adapter in locked position (valve closed as in picture 1 (below)).
3. Turn pressure gauge cock so it faces adapter «9995479»(ref-403953-S17462459562011061000000) .
4. Connect other pressure gauge connector to fuel draining unit «9812270»(ref-403953-S06137301002011061000000) , «9812273»(ref-403953-S13586864282011061000000) and «9812282»(ref-403953-S26175172122011061000000) .
5. Unlock adapter (illustration 2 valve open (below)).

1. Continue Refer to «Starting fuel pump (FP)»(ref-408500-S18166617062011071200000)

1. Remove central electrical unit cover.
2. Remove fuel pump relay (position 103 in electrical distribution unit).
3. Connect a cable between relay base terminals 1 and 3. Ignition on.

Fuel pump (FP) should operate.

1. Continue Refer to «Measuring line pressure»(ref-408500-S05614168022011071200000)

1. Read off line pressure from pressure gauge.

Line pressure should be 300 kPa (3.0 kp/cm 2).

1. OK Refer to «Checking fuel filter»(ref-408500-S10103276312011071200000)
2. LOW Refer to «Line pressure too low»(ref-408500-S31321223582011071200000)
3. HIGH Refer to «Line pressure too high»(ref-408500-S08957298052011071200000)

Line pressure too high

1. Ignition off.
2. Remove the cable between the relay base terminals 1 and 3.
3. Disconnect return line from pressure regulator. Blow through the line into the fuel tank.

Is cable OK?

1. YES Refer to «Replacing pressure regulator»(ref-408500-S19224702382011071200000)
2. NO Refer to «Checking for blockage»(ref-408500-S09641599542011071200000)

Try a new pressure regulator according to

1. See «Pressure regulator, replacement»(ref-408433-S03572659372011071200000) (B5202S/B5252S Fenix 5.2)
2. See «Pressure regulator, replacement»(ref-408433-S29584013312011071200000) (other engines)

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S19645255352011071200000)

1. Check if there is a blockage in the return line. Clean and replace as necessary.

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S19645255352011071200000)

1. Remove central electrical unit cover.
2. Remove fuel pump relay (position 103 in electrical distribution unit).
3. Connect a cable between relay base terminals 1 and 3. Ignition on.

Fuel pump (FP) should operate.

1. Continue Refer to «Measuring line pressure»(ref-408500-S22450281102011071200000)

1. Read off line pressure from pressure gauge.

Line pressure should be 300 kPa (3.0 kp/cm 2).

1. OK Refer to «Stop fuel pump (FP)»(ref-408500-S41303140732011071200000)
2. NOT OK Refer to «Information»(ref-408500-S23768389842011071200000)

1. Squeeze the return line and check is the pressure rises.

Did the pressure increase?

1. YES Refer to «Replacing pressure regulator»(ref-408500-S42349167902011071200000)
2. NO Refer to «Checking for blockage»(ref-408500-S22600079772011071200000)

Try a new pressure regulator according to

1. See «Pressure regulator, replacement»(ref-408433-S03572659372011071200000) (B5202S/B5252S Fenix 5.2)
2. See «Pressure regulator, replacement»(ref-408433-S29584013312011071200000) (other engines)

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S19645255352011071200000)

1. Check filter gauze at fuel pump (FP). If it is OK: Replace fuel pump (FP) according to «Fuel pump, replacement»(ref-408434-S03598367072011071200000)

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S19645255352011071200000)

1. Squeeze the return line and check if pressure increases quickly or slowly.

Did the pressure increase quickly?

1. YES Refer to «Checking pressure regulator, pressure reduction»(ref-408500-S14647778712011071200000)
2. NO Refer to «Replacing fuel filter»(ref-408500-S01416861552011071200000)

1. Replace fuel filter according to «Fuel filter, replacement»(ref-408434-S37504734802011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Checking fuel filter»(ref-408500-S00337186622011071200000)

1. Squeeze the return line and check if pressure increases quickly or slowly.

Did the pressure increase quickly?

1. YES Refer to «Stop fuel pump (FP)»(ref-408500-S41303140732011071200000)
2. NO Refer to «Information»(ref-408500-S23768389842011071200000)

1. Connect vacuum pump «9995843»(ref-403953-S06330547042011061000000) to pressure regulator.
2. Pump air out of the regulator. Check that line pressure drops by the same amount as the pressure in the regulator drops. 300 kpa - negative pressure = line pressure Disconnect the hose from the vacuum pump.

Line pressure should return to 300 kPa.

1. OK Refer to «Checking pressure regulator, pressure increase»(ref-408500-S27667393362011071200000)
2. NOT OK Refer to «Replacing pressure regulator»(ref-408500-S39123669742011071200000)

Try a new pressure regulator according to

1. See «Pressure regulator, replacement»(ref-408433-S03572659372011071200000) (B5202S/B5252S Fenix 5.2)
2. See «Pressure regulator, replacement»(ref-408433-S29584013312011071200000) (other engines)

Continue when the fault has been repaired.

1. Continue Refer to «Checking pressure regulator, pressure reduction»(ref-408500-S16652311602011071200000)

1. Connect vacuum pump «9995843»(ref-403953-S06330547042011061000000) to pressure regulator.
2. Pump air out of the regulator. Check that line pressure drops by the same amount as the pressure in the regulator drops. 300 kpa - negative pressure = line pressure Disconnect the hose from the vacuum pump.

Line pressure should return to 300 kPa.

1. OK Refer to «Stop fuel pump (FP)»(ref-408500-S41303140732011071200000)
2. NOT OK Refer to «Information»(ref-408500-S23768389842011071200000)

1. Connect pressure tester «9985496»(ref-403953-S16783487572011061000000) and pressure gauge «9995230»(ref-403953-S08208420282011061000000) to pressure regulator.
2. Pump up pressure. Check that line pressure rises by the same amount as the pressure in the regulator. 300 kpa + overpressure = line pressure. Disconnect hose from pressure tester.

Line pressure should return to 300 kPa.

1. OK Refer to «Checking residual pressure»(ref-408500-S34932712192011071200000)
2. NOT OK Refer to «Replacing pressure regulator»(ref-408500-S42883336522011071200000)

Try a new pressure regulator according to

1. See «Pressure regulator, replacement»(ref-408433-S03572659372011071200000) (B5202S/B5252S Fenix 5.2)
2. See «Pressure regulator, replacement»(ref-408433-S29584013312011071200000) (other engines)

Continue when the fault has been repaired.

1. Continue Refer to «Checking pressure regulator, pressure increase»(ref-408500-S22860649102011071200000)

1. Connect pressure tester «9985496»(ref-403953-S16783487572011061000000) and pressure gauge «9995230»(ref-403953-S08208420282011061000000) to pressure regulator.
2. Pump up pressure. Check that line pressure rises by the same amount as the pressure in the regulator. 300 kpa + overpressure = line pressure. Disconnect hose from pressure tester.

Line pressure should return to 300 kPa.

1. OK Refer to «Stop fuel pump (FP)»(ref-408500-S41303140732011071200000)
2. NOT OK Refer to «Information»(ref-408500-S23768389842011071200000)

1. Ignition off.
2. Disconnect cable between relay base terminals 1 and 3.
3. Reinstall the fuel pump relay.

Line pressure must not drop below 200 kPa in less than 20 minutes.

1. OK Refer to «Disconnecting pressure gauge»(ref-408500-S10771563162011071200000)
2. NOT OK Refer to «Replacing injectors, connections or other components»(ref-408500-S20620444862011071200000)

Replacing injectors, connections or other components

1. Incorrect residual pressure readings may be due to leakage from injectors, connections, pressure regulator, fuel pump non-return valve or lines. Repair as necessary.

Continue when the fault has been repaired.

1. Continue Refer to «Checking residual pressure»(ref-408500-S05118538762011071200000)

1. Ignition off.
2. Disconnect cable between relay base terminals 1 and 3.
3. Reinstall the fuel pump relay.

Line pressure must not drop below 200 kPa in less than 20 minutes.

1. OK Refer to «Stop fuel pump (FP)»(ref-408500-S41303140732011071200000)
2. NOT OK Refer to «Information»(ref-408500-S23768389842011071200000)

1. Ignition off.
2. Start draining unit.
3. Turn pressure gauge cock to mid-position.
4. Lock adapter (valve closed as in picture 1 (below)).
5. Disconnect adapter from valve.
6. Stop draining unit.
7. Reinstall equipment. CAUTION: Remember to reinstall valve safety cap.

1. Switch off the ignition.
2. Disconnect cable between relay base terminals 1 and 3.
3. Reinstall the fuel pump relay.

1. Continue Refer to «Disconnecting pressure gauge»(ref-408500-S26822108342011071200000)

1. Ignition off.
2. Start draining unit.
3. Turn pressure gauge cock to mid-position.
4. Lock adapter (valve closed as in picture 1 (below)).
5. Disconnect adapter from valve.
6. Stop draining unit.
7. Reinstall equipment. CAUTION: Remember to reinstall valve safety cap.

1. Ignition off.
2. Disconnect cable between relay base terminals 1 and 3.
3. Reinstall the fuel pump relay.

1. Continue Refer to «Disconnecting pressure gauge»(ref-408500-S03149999032011071200000)

1. Ignition off.
2. Start draining unit.
3. Turn pressure gauge cock to mid-position.
4. Lock adapter (valve closed as in picture 1 (below)).
5. Disconnect adapter from valve.
6. Stop draining unit.
7. Reinstall equipment. CAUTION: Remember to reinstall valve safety cap.

Continue when the fault has been repaired.

1. Continue 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.

1. Supplement pressure gauge «9995011»(ref-403953-S13051471402011061000000) with nipple «9989725»(ref-403953-S30652708112011061000000) and adapter «9995479»(ref-403953-S17462459562011061000000) before use.
2. Connect adapter to valve on fuel rail, with adapter in locked position (valve closed as in picture 1 (below)).
3. Turn pressure gauge cock so it faces adapter «9995479»(ref-403953-S17462459562011061000000) .
4. Connect other pressure gauge connector to fuel draining unit «9812270»(ref-403953-S06137301002011061000000) , «9812273»(ref-403953-S13586864282011061000000) and «9812282»(ref-403953-S26175172122011061000000) .
5. Unlock adapter (illustration 2 valve open (below)).

1. Continue Refer to «Starting fuel pump (FP)»(ref-408500-S13091782002011071200000)

1. Connect jumper lead across relay base terminals 1 and 3. Switch on ignition.

Fuel pump should run.

1. Continue Refer to «Checking fuel filter»(ref-408500-S06875711372011071200000)

The previous test indicates that a repair must be made before continuing with fault-tracing. You cannot proceed with the fault-tracing tests at this point.

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

1. Ignition off.
2. Heated oxygen sensor (HO2S) connected.
3. Disconnect the Volvo Scan Tool (ST) from the VIDA station and use it in stand-alone mode.
4. Test drive car according to «Verifying repairs»(ref-408503-S33503491122011071200000) .
5. Go into verification menu. Watch EFI-435, wait until the status of EFI-435 switches to tested. Read off diagnostic trouble codes (DTCs).

If EFI-435 is stored they should have intermittent status.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S04234028342011071200000)

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

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

1. Switch off ignition.
2. Disconnect jumper lead between relay base terminals 1 and 3.

1. Continue Refer to «Checking for blockage»(ref-408500-S19082389082011071200000)

1. Switch off ignition.
2. Disconnect jumper lead between relay base terminals 1 and 3.

1. Continue Refer to «Checking for blockage»(ref-408500-S13301166692011071200000)

1. Connect jumper lead across relay base terminals 1 and 3. Switch on ignition.

Fuel pump should run.

1. Continue Refer to «Checking pressure regulator, pressure reduction»(ref-408500-S37135915782011071200000)

1. Connect jumper lead across relay base terminals 1 and 3. Switch on ignition.

Fuel pump should run.

1. Continue Refer to «Checking pressure regulator, pressure increase»(ref-408500-S42644298742011071200000)

1. Connect jumper lead across relay base terminals 1 and 3. Switch on ignition.

Fuel pump should run.

1. Continue Refer to «Checking residual pressure»(ref-408500-S28620066452011071200000)

The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.

Complete the fault-tracing for those fault or try again.

EFI-436: Rear heated oxygen sensor (HO2S), compensation

Condition

The rear heated oxygen sensor (HO2S) constantly monitors the front heated oxygen sensor (HO2S), ensuring that it adjusts the short term fuel trim integrator so that it corresponds to the exhaust gas oxygen content. If the short term fuel trim integrator deviates, the rear heated oxygen sensor (HO2S) will make fine adjustments to it. If this adjustment is too great the engine control module (ECM) interprets this as a damaged front heated oxygen sensor (HO2S) and diagnostic trouble code (DTC) EFI-436 is stored.

Substitute Value

1. twin heated oxygen sensor (HO2S) control disabled.

Possible Source

1. uneven compression
2. air leakage in the intake system
3. air leakage in the exhaust system
4. defective rear heated oxygen sensor (HO2S)
5. defective front heated oxygen sensor (HO2S).

Fault symptom[s]

1. may result in poor performance.

EFI-436 Rear heated oxygen sensor (HO2S), compensation

1. Carry out a compression check as per «Compression test»(ref-408502-S36810950462011071200000) .

Is the compression in any cylinder incorrect?

1. YES Refer to «Fault tracing information»(ref-408500-S02402212402011071200000)
2. NO Refer to «Checking for air leakage»(ref-408500-S29454947672011071200000)

1. Rectify as necessary.

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S04985102972011071200000)

1. Check fuel and residual pressure according to «Fuel pressure and residual pressure»(ref-408500-S02240667052011071200000) .

Are fuel and residual pressures OK?

1. Try a new front heated oxygen sensor (HO2S).

Continue when the fault has been remedied.

1. Continue Refer to «Verification»(ref-408500-S04985102972011071200000)

1. Check if there is any air leakage as per «Checking intake system»(ref-438955-S17846880682011120700000) .

Is there any air leakage?

1. YES Refer to «Fault tracing information»(ref-408500-S32859441842011071200000)
2. NO Refer to «Checking for air leakage in the exhaust system»(ref-408500-S12271689222011071200000)

1. Rectify as necessary.

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S04985102972011071200000)

1. Check if there is any air leakage as per «Checking exhaust system»(ref-438955-S01846064922011120700000) .

Is there any air leakage?

1. YES Refer to «Fault tracing information»(ref-408500-S32859441842011071200000)
2. NO Refer to «Check the fuel pump relay's two-stage function»(ref-408500-S10541702402011071200000)

Special tools

See 9812270

See 9812273

See 9812282

See 9989725

See 9995011

1. Ignition off.
2. Remove fuse no. 2. Connect a Fluke multimeter (or equivalent), set to measure DC, between fuse no. 2's tabs in the fuse-holder. NOTE: The VIDA station could not be used in this measurement. Start the engine.

Rev. the engine; at speeds above 3000 RPM, current consumption should be higher than at speeds below 3000 RPM.

1. OK Refer to «Checking fuel pressure and residual pressure»(ref-408500-S39561399832011071200000)
2. NOT OK Refer to «Checking full-speed»(ref-408500-S06280298622011071200000)

1. Ignition off.
2. Remove the cover from the central electrical unit.
3. Remove the fuel pump relay (pos. 103 in the central electrical unit)
4. Connect a lead between the relay connector 1 and 3.
5. Ignition on. Check that the fuel pump is working by gently squeezing the hose leading to the fuel pressure regulator. A slight pulsating sensation is felt if the fuel pump is working.

Is the fuel pump working?

1. YES Refer to «Checking half-speed»(ref-408500-S26509722332011071200000)
2. NO Refer to «Checking for open-circuit»(ref-408500-S00325015372011071200000)

1. Check the lead between the fuel pump relay connector 3 and the fuel pump connector 1 for signs of a break as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S11036285222011071200000)

1. Ignition off.
2. Remove the lead linking connector 1 and 3 on the fuel pump relay connector.
3. Connect the lead between the relay coupling's connector 1 and 5.
4. Ignition on. Check that the fuel pump is working by gently squeezing the hose leading to the fuel pressure regulator. A slight pulsating sensation is felt if the pump is working.

Is the fuel pump working?

1. YES Refer to «Replacement of fuel pump relay»(ref-408500-S25214172382011071200000)
2. NO Refer to «Check the lead between the relay and the series resistance.»(ref-408500-S04557427042011071200000)

1. Ignition off.
2. Remove the windshield wiper arms.
3. Remove the plenum cover.
4. Disconnect the series resistance.
5. Connect the lead between relay coupling connectors 1 and 5.
6. Ignition on. Connect a voltmeter between the series resistance's connector 2 (to fuel pump relay) and ground.

The voltmeter should show battery voltage.

1. OK Refer to «Check the series resistance»(ref-408500-S14780625202011071200000)
2. NOT OK Refer to «Checking for open-circuit»(ref-408500-S16783729522011071200000)

1. Check the lead between the fuel pump relay connector 5 and the series resistance, connector 2, for signs of a break as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Press Continue when fault is repaired.

1. Continue Refer to «Verification»(ref-408500-S11036285222011071200000)

1. Ignition off.
2. Series resistance disconnected. Connect an ohmmeter between the series resistance's coupling 1 and 2 (to series resistance).

The ohmmeter should show approx. 0.9 W.

1. OK Refer to «Checking for open-circuit»(ref-408500-S12746996512011071200000)
2. NOT OK Refer to «Replacement of series resistance»(ref-408500-S32965056652011071200000)

1. Check the lead between the series resistance connector 1 and fuel pump connector 1 for signs of a break as per «Open-circuit, permanent faults»(ref-408435-S07999989592011071200000) .

Press Continue when fault is repaired

1. Continue Refer to «Verification»(ref-408500-S11036285222011071200000)

HINT: After repair, it is necessary to check that the fault has been corrected.

HINT: Perform as follows

1. Ignition off.
2. Reconnect connectors, components etc.
3. Remove fuse no. 2. Connect a Fluke multimeter (or equivalent), set to measure DC, between fuse no. 2's tabs in the fuse-holder. NOTE: The VIDA station could not be used in this measurement. Start the engine

Rev. the engine; at speeds above 3000 RPM, current consumption should be higher than at speeds below 3000 RPM.

1. OK OKAY: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S35939874762011071200000)

The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.

Complete the fault-tracing for those fault or try again.

Special tools

See 9812270

See 9812273

See 9812282

See 9989725

See 9995011

See 9995479

See 9995843

See 9985496

See 9995230

It is possible to measure fuel pressure with the car stationary or while being driven. Residual pressure is measured with the car stationary.

For measurement while the car is being driven see Taking fuel pressure readings while driving the car .

1. Continue Refer to «Checking vacuum hose to pressure regulator»(ref-408500-S04188846202011071200000)

1. Ignition off.
2. Remove throttle pulley cover.
3. Disconnect vacuum hose from pressure regulator. Check that the hose is not blocked by blowing into it.

Is the hose OK?

1. YES Refer to «Connect pressure gauge»(ref-408500-S26460507462011071200000)
2. NO Refer to «Checking hose and connection»(ref-408500-S37932337632011071200000)

1. Check hose and terminal on intake manifold, clean/replace.

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S26016426622011071200000)

1. Supplement pressure gauge «9995011»(ref-403953-S13051471402011061000000) with nipple «9989725»(ref-403953-S30652708112011061000000) and adapter «9995479»(ref-403953-S17462459562011061000000) before use.
2. Connect adapter to valve on fuel rail, with adapter in locked position (valve closed as in see scheme 823 ).
3. Turn pressure gauge cock so it faces adapter «9995479»(ref-403953-S17462459562011061000000).
4. Connect other pressure gauge connector to fuel draining unit «9812270»(ref-403953-S06137301002011061000000), «9812273»(ref-403953-S13586864282011061000000) and «9812282»(ref-403953-S26175172122011061000000).
5. Unlock adapter (illustration 2 valve open (below)).

1. Continue Refer to «Starting fuel pump (FP)»(ref-408500-S17998080572011071200000)

1. Remove central electrical unit cover.
2. Remove fuel pump relay (position 103 in electrical distribution unit).
3. Connect a cable between relay base terminals 1 and 3. Ignition on.

Fuel pump (FP) should operate.

1. Continue Refer to «Measuring line pressure»(ref-408500-S19439796782011071200000)

1. Read off line pressure from pressure gauge.

Line pressure should be 300 kPa (3.0 kp/cm 2).

1. OK Refer to «Checking fuel filter»(ref-408500-S06303505302011071200000)
2. LOW Refer to «Line pressure too low»(ref-408500-S37335203172011071200000)
3. HIGH Refer to «Line pressure too high»(ref-408500-S17186231652011071200000)

1. Ignition off.
2. Remove the cable between the relay base terminals 1 and 3.
3. Disconnect return line from pressure regulator. Blow through the line into the fuel tank.

Is cable OK?

1. YES Refer to «Stop fuel pump, replace pressure regulator»(ref-408500-S35245152762011071200000)
2. NO Refer to «Stop fuel pump, check for blockage»(ref-408500-S12523375452011071200000)

Try a new pressure regulator according to

1. See «Pressure regulator, replacement»(ref-408433-S03572659372011071200000) (B5202S/B5252S Fenix 5.2)
2. See «Pressure regulator, replacement»(ref-408433-S29584013312011071200000) (other engines)

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S26016426622011071200000)

1. Check if there is a blockage in the return line. Clean and replace as necessary.

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S26016426622011071200000)

1. Remove central electrical unit cover.
2. Remove fuel pump relay (position 103 in electrical distribution unit).
3. Connect a cable between relay base terminals 1 and 3. Ignition on.

Fuel pump (FP) should operate.

1. Continue Refer to «Measuring line pressure»(ref-408500-S31767077892011071200000)

1. Read off line pressure from pressure gauge.

Line pressure should be 300 kPa (3.0 kp/cm 2).

1. OK Refer to «Stop fuel pump (FP)»(ref-408500-S39552704892011071200000)
2. NOT OK Refer to «Information»(ref-408500-S31348873622011071200000)

1. Squeeze the return line and check is the pressure rises.

Did the pressure increase?

1. YES Refer to «Stop fuel pump, replace pressure regulator»(ref-408500-S23906890372011071200000)
2. NO Refer to «Stop fuel pump, check for blockage»(ref-408500-S04264406892011071200000)

Try a new pressure regulator according to

1. See «Pressure regulator, replacement»(ref-408433-S03572659372011071200000) (B5202S/B5252S Fenix 5.2)
2. See «Pressure regulator, replacement»(ref-408433-S29584013312011071200000) (other engines)

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S26016426622011071200000)

1. Check filter gauze at fuel pump (FP). If it is OK: Replace fuel pump (FP) according to «Fuel pump, replacement»(ref-408434-S03598367072011071200000)

Continue when the fault has been repaired.

1. Continue Refer to «Connect pressure gauge»(ref-408500-S26016426622011071200000)

1. Squeeze the return line and check if pressure increases quickly or slowly.

Did the pressure increase quickly?

1. YES Refer to «Checking pressure regulator, pressure reduction»(ref-408500-S16082931062011071200000)
2. NO Refer to «Stop fuel pump, replace fuel filter»(ref-408500-S08185236212011071200000)

1. Replace fuel filter according to «Fuel filter, replacement»(ref-408434-S37504734802011071200000) .

Continue when the fault has been repaired.

1. Continue Refer to «Start fuel pump, check fuel filter»(ref-408500-S12954757232011071200000)

1. Squeeze the return line and check if pressure increases quickly or slowly.

Did the pressure increase quickly?

1. YES Refer to «Stop fuel pump (FP)»(ref-408500-S39552704892011071200000)
2. NO Refer to «Information»(ref-408500-S31348873622011071200000)

1. Connect vacuum pump «9995843»(ref-403953-S06330547042011061000000) to pressure regulator.
2. Pump air out of the regulator. Check that line pressure drops by the same amount as the pressure in the regulator drops. 300 kpa - negative pressure = line pressure Disconnect the hose from the vacuum pump.

Line pressure should return to 300 kPa.

1. OK Refer to «Checking pressure regulator, pressure increase»(ref-408500-S20921444292011071200000)
2. NOT OK Refer to «Stop fuel pump, replace pressure regulator»(ref-408500-S02764245692011071200000)

Try a new pressure regulator according to

1. See «Pressure regulator, replacement»(ref-408433-S03572659372011071200000) (B5202S/B5252S Fenix 5.2)
2. See «Pressure regulator, replacement»(ref-408433-S29584013312011071200000) (other engines)

Continue when the fault has been repaired.

1. Continue Refer to «Start fuel pump, check pressure regulator - pressure reduction»(ref-408500-S31811868662011071200000)

1. Connect vacuum pump «9995843»(ref-403953-S06330547042011061000000) to pressure regulator.
2. Pump air out of the regulator. Check that line pressure drops by the same amount as the pressure in the regulator drops. 300 kpa - negative pressure = line pressure Disconnect the hose from the vacuum pump.

Line pressure should return to 300 kPa.

1. OK Refer to «Stop fuel pump (FP)»(ref-408500-S39552704892011071200000)
2. NOT OK Refer to «Information»(ref-408500-S31348873622011071200000)

1. Connect pressure tester «9985496»(ref-403953-S16783487572011061000000) and pressure gauge «9995230»(ref-403953-S08208420282011061000000) to pressure regulator.
2. Pump up pressure. Check that line pressure rises by the same amount as the pressure in the regulator. 300 kpa + overpressure = line pressure. Disconnect hose from pressure tester.

Line pressure should return to 300 kPa.

1. OK Refer to «Checking residual pressure»(ref-408500-S28021809562011071200000)
2. NOT OK Refer to «Stop fuel pump, replace pressure regulator»(ref-408500-S18167976922011071200000)

Try a new pressure regulator according to

1. See «Pressure regulator, replacement»(ref-408433-S03572659372011071200000) (B5202S/B5252S Fenix 5.2)
2. See «Pressure regulator, replacement»(ref-408433-S29584013312011071200000) (other engines)

Continue when the fault has been repaired.

1. Continue Refer to «Start fuel pump, check pressure regulator - pressure increase»(ref-408500-S38683703472011071200000)

1. Connect pressure tester «9985496»(ref-403953-S16783487572011061000000) and pressure gauge «9995230»(ref-403953-S08208420282011061000000) to pressure regulator.
2. Pump up pressure. Check that line pressure rises by the same amount as the pressure in the regulator. 300 kpa + overpressure = line pressure. Disconnect hose from pressure tester.

Line pressure should return to 300 kPa.

1. OK Refer to «Stop fuel pump (FP)»(ref-408500-S39552704892011071200000)
2. NOT OK Refer to «Information»(ref-408500-S31348873622011071200000)

1. Ignition off.
2. Disconnect cable between relay base terminals 1 and 3.
3. Reinstall the fuel pump relay.

Line pressure must not drop below 200 kPa in less than 20 minutes.

1. OK Refer to «Disconnecting pressure gauge»(ref-408500-S40455782482011071200000)
2. NOT OK Refer to «Replacing fuel system components»(ref-408500-S29749103072011071200000)

Replacing fuel system components

1. Incorrect residual pressure readings may be due to leakage from injectors, connections, pressure regulator, fuel pump non-return valve or lines. Repair as necessary.

Continue when the fault has been repaired.

1. Continue Refer to «Start fuel pump, check residual pressure»(ref-408500-S35688159752011071200000)

1. Ignition off.
2. Disconnect cable between relay base terminals 1 and 3.
3. Reinstall the fuel pump relay.

Line pressure must not drop below 200 kPa in less than 20 minutes.

1. OK Refer to «Stop fuel pump (FP)»(ref-408500-S39552704892011071200000)
2. NOT OK Refer to «Information»(ref-408500-S31348873622011071200000)

1. Ignition off.
2. Start draining unit.
3. Turn pressure gauge cock to mid-position.
4. Lock adapter (valve closed as in see scheme 850 ).
5. Disconnect adapter from valve.
6. Stop draining unit.
7. Reinstall equipment. CAUTION: Remember to reinstall valve safety cap.

1. Continue FAULT NOT FOUND: Troubleshooting has been completed.

1. Switch off the ignition.
2. Disconnect cable between relay base terminals 1 and 3.
3. Reinstall the fuel pump relay.

1. Continue Refer to «Disconnecting pressure gauge»(ref-408500-S04030773262011071200000)

1. Ignition off.
2. Start draining unit.
3. Turn pressure gauge cock to mid-position.
4. Lock adapter (valve closed as in see scheme 854 ).
5. Disconnect adapter from valve.
6. Stop draining unit.
7. Reinstall equipment. CAUTION: Remember to reinstall valve safety cap.

1. Continue OKAY: Troubleshooting has been completed.

1. Ignition off.
2. Disconnect cable between relay base terminals 1 and 3.
3. Reinstall the fuel pump relay.

1. Continue Refer to «Disconnecting pressure gauge»(ref-408500-S29241727172011071200000)

1. Ignition off.
2. Start draining unit.
3. Turn pressure gauge cock to mid-position.
4. Lock adapter (valve closed as in see scheme 857 ).
5. Disconnect adapter from valve.
6. Stop draining unit.
7. Reinstall equipment. CAUTION: Remember to reinstall valve safety cap.

Continue when the fault has been repaired.

1. Continue 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.

1. Supplement pressure gauge «9995011»(ref-403953-S13051471402011061000000) with nipple «9989725»(ref-403953-S30652708112011061000000) and adapter «9995479»(ref-403953-S17462459562011061000000) before use.
2. Connect adapter to valve on fuel rail, with adapter in locked position (valve closed as in see scheme 858 ).
3. Turn pressure gauge cock so it faces adapter «9995479»(ref-403953-S17462459562011061000000).
4. Connect other pressure gauge connector to fuel draining unit «9812270»(ref-403953-S06137301002011061000000), «9812273»(ref-403953-S13586864282011061000000) and «9812282»(ref-403953-S26175172122011061000000).
5. Unlock adapter (illustration 2 valve open (below)).

1. Continue Refer to «Starting fuel pump (FP)»(ref-408500-S02951438342011071200000)

1. Connect jumper lead across relay base terminals 1 and 3. Switch on ignition.

Fuel pump should run.

1. Continue Refer to «Checking fuel filter»(ref-408500-S19962447572011071200000)

The previous test indicates that a repair must be made before continuing with fault-tracing. You cannot proceed with the fault-tracing tests at this point.

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

1. Ignition off.
2. Heated oxygen sensor (HO2S) connected.
3. Disconnect the Volvo Scan Tool (ST) from the VIDA station and use it in stand-alone mode.
4. Test drive car according to «Verifying repairs»(ref-408503-S33503491122011071200000) . Go into the Diagnostic Test Mode (DTM) menu. Watch EFI-436, wait until the status of EFI-436 switches to tested. Read off diagnostic trouble codes (DTCs).

If EFI-436 is stored they should have intermittent status.

1. OK VERIFIED: Troubleshooting has been completed.
2. NOT OK Refer to «Information»(ref-408500-S40088746772011071200000)

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

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

1. Switch off ignition.
2. Disconnect jumper lead between relay base terminals 1 and 3.

1. Continue Refer to «Checking for blockage»(ref-408500-S02172944352011071200000)

1. Switch off ignition.
2. Disconnect jumper lead between relay base terminals 1 and 3.

1. Continue Refer to «Checking for blockage»(ref-408500-S19413434702011071200000)

1. Connect jumper lead across relay base terminals 1 and 3. Switch on ignition.

Fuel pump should run.

1. Continue Refer to «Checking pressure regulator, pressure reduction»(ref-408500-S42402722872011071200000)

1. Connect jumper lead across relay base terminals 1 and 3. Switch on ignition.

Fuel pump should run.

1. Continue Refer to «Checking pressure regulator, pressure increase»(ref-408500-S25174210052011071200000)

1. Connect jumper lead across relay base terminals 1 and 3. Switch on ignition.

Fuel pump should run.

1. Continue Refer to «Checking residual pressure»(ref-408500-S26754881392011071200000)

The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.

Complete the fault-tracing for those fault or try again.