Upper Limit
Upper limit
Checking fuel injection system
Check the induction system for air leaks. See Air leakage in the intake system, checking, B5244T5, B5254T2 Air Leaks in the Intake System, Checking
Hint: Air leakage in the intake system can occur through the evaporative emission system (EVAP) valve, the secondary air solenoid valve and power brake booster.
Remedy as necessary.
Continue - Checking fuel and residual pressures
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Verification
Verification
Test drive the car according to the TRIP schedule, see Verifying repairs Verifying Repairs.
Do not turn off engine after test drive.
Connect the car to VIDA again.
Read off fuel trim status.
There should not be any faults when fuel trim is finished.
Was a fault detected?
Yes - VERIFICATION FAILED
No - VERIFIED
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - Fault Found
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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 - FAULT-TRACING FAILED
No - Attempt New Test
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FAULT-TRACING FAILED - FAULT-TRACING FAILED
Attempt New Test - Checking fuel injection system
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Checking fuel and residual pressures
Checking the fuel pressure and residual pressure in the workshop
Choosing a method for taking a reading
Note! For vehicles with demand activated fuel pumps (FP), see VIDA vehicle communication Quick test of fuel pump (FP).
The fuel pressure can be measured with the car stationary or while being driven. Residual pressure is measured with the car stationary.
When the car is being driven, see Taking fuel pressure readings while driving the car Taking Fuel Pressure Readings While Driving the Car.
Continue - Measuring the line pressure
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Measuring the line pressure
- Connect the pressure gauge according to Fuel pressure gauge Fuel Pressure Gauge
- Remove the soundproofing panel
- Remove the fuel pump (FP) relay (CMI 12 in the passenger compartment)
- Connect a cable to the relay base as illustrated.
Read off the line pressure from the pressure gauge. The line pressure must be 375-395 kPa
Check the residual pressure if the fuel pressure is OK.
Remedy as necessary
Other information
- For the location of and to replace the fuel pump (FP) relay, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- For the location of and to replace the fuel pump (FP), see Right side fuel pump with level sensor Right Side Fuel Pump With Level Sensor
- Replacing the fuel filter Service and Repair
- To disconnect the pressure gauge, see Fuel pressure gauge Fuel Pressure Gauge.
Is the rest pressure to be checked?
Yes - Checking the residual pressure
No - DONE
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Checking the residual pressure
- Switch off the ignition
- Disconnect the cable between the terminals on the relay base
- Reinstall the fuel pump (FP) relay.
The line pressure must not fall below 200 kPa within 20 minutes of the fuel pump (FP) being shut-off.
Remedy as necessary
Other information
- For the location of and to replace the fuel pump (FP) relay, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- For the location of and to replace the fuel pump (FP), see Right side fuel pump with level sensor Right Side Fuel Pump With Level Sensor
- To disconnect the pressure gauge, see Fuel pressure gauge Fuel Pressure Gauge.
Continue - DONE
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DONE - Checking the fuel injection system
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Checking the fuel injection system
Test drive the car for approximately 10 minutes
Check the mass air flow (MAF) sensor. Read off its correction factor. The value should be between 0.8 and 1.2.
Note! There must not be any air leakage when this test is carried out.
Remedy as necessary.
Other information
- Mass air flow (MAF) sensor, replacing Service and Repair
Continue - Verification
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