Faulty Signal
Faulty signal
EFI-414 Boost pressure control
Checking mass air flow (MAF) sensor
- Ignition on.
- 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.
OK - Connecting breakout box
Not OK - Checking the connectors
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Checking the connectors
- Ignition off.
- Check mass air flow (MAF) sensor and control module connectors for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Mass air flow (MAF) sensor connected.
- Control module connected.
- 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.
OK - Fault-tracing information
Not OK - Replacing component
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Fault-tracing information
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.
Continue - Verification
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Replacing component
Try a new mass air flow (MAF) sensor.
Continue - Verification
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Connecting breakout box
Connecting the breakout box
Connecting breakout box to connector B (gray)
- Ignition off.
- 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 951 1351 ADAPTOR 86-PIN 951 1351 Adaptor 86-Pin to engine control module (ECM) connector and connect breakout box 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 to adapter.
Will the engine control module (ECM) be connected when readings are taken on connector B?
Yes - Checking ground terminal #B28
No - Return to the fault-tracing procedure where it was interrupted.
No Fault Found
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Checking ground terminal #B28
- Ignition off.
- Switch off all equipment that takes power from the battery (courtesy lighting, radio etc).
- 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.
OK - Return to the fault-tracing procedure where it was interrupted.
No Fault Found
Not OK - Checking for an open-circuit
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Checking for an open-circuit
Check ground terminal 31/71 on the right side member and cables to this for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select "Continue" when the fault has been repaired.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair check that the fault has been remedied.
- Ignition off.
- Control module disconnected.
- 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.
OK - VERIFIED
Not OK - VERIFICATION FAILED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
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.
Do you want to terminate fault-tracing at this time?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Connecting breakout box to connector B (gray)
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FAULT FOUND - Check cable for boost pressure reduction
No Fault Found - Check cable for boost pressure reduction
FAULT-TRACING FAILED - Check cable for boost pressure reduction
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Check cable for boost pressure reduction
- Disconnect control module.
- Ignition on.
Connect a voltmeter between connector #42 (#B42) on the breakout box and ground.
The voltmeter should read battery voltage.
OK - Checking the connectors
Not OK - Checking for an open-circuit
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Checking for an open-circuit
Check cable between Motronic engine control module (ECM) #B42 and transmission control module (TCM) #B1 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Continue - Verification
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Checking the connectors
- Ignition off.
- Check turbocharger (TC) control valve and engine control module (ECM) connectors for contact resistance and oxidation and remedy according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Turbocharger (TC) control valve connected.
- Control module connected.
- Ignition on.
- Select Volvo Scan Tool (ST) to activate turbocharger (TC) control valve.
Is the turbocharger (TC) control valve working (synchronizing)?
Yes - Checking hoses
No - Replacing component
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Replacing component
Try a new turbocharger (TC) control valve.
Continue - Verification
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Checking hoses
- 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?
Yes - Checking pressure servo
No - Fault-tracing information
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Fault-tracing information
Clean, replace if necessary.
Continue - Verification
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Checking pressure servo
- Ignition off.
- Disconnect the hose from the pressure servo.
- Connect manometer 999 5230 PRESSURE METER 999 5230 Pressure Meter and pressure tester 999 5496 PUNCH 999 5496 Punch to pressure servo.
- Pump up a pressure of approximately 75 kPa.
- 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?
Yes - Verification
No - Replacing component
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Replacing component
Try a new pressure servo.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied as follows:
- Reconnect connectors and reinstall components.
- Disconnect the Volvo Scan Tool (ST) from the VIDA station and use it in stand-alone mode.
- Erase diagnostic trouble codes (DTCs).
- Test drive the car.
- Depress the accelerator pedal (AP) to the floor a few times.
- Read off any diagnostic trouble codes (DTCs).
Diagnostic trouble code (DTC) EFI-414 should not be stored.
OK - VERIFIED
Not OK - VERIFICATION FAILED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking mass air flow (MAF) sensor
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