Upper Limit
Upper limit
Checking for air leakage in the intake system
Check the induction system for air leaks. See. Air leakage in the intake system, checking, B5234T9, B5244T7 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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Checking fuel and residual pressures
Checking fuel pressure and residual pressure in the workshop
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 Taking Fuel Pressure Readings While Driving the Car.
Continue - Measuring line pressure
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Measuring line pressure
- Connect pressure gauge according to Fuel pressure gauge Fuel Pressure Gauge.
- Remove central electrical unit cover
- Remove fuel pump (FP) relay (terminal 103 in central electrical unit)
- Connect jumper cable across relay base terminals 1 and 3
- Switch on ignition, fuel pump should start
Read off line pressure from pressure gauge. The line pressure should be 375-395 kPa
If the fuel pressure is OK, check the residual pressure.
Remedy as necessary
Other information
- For the location of and to replace the fuel pump (FP), see Fuel pump, replacement Fuel Pump, Replacement.
- For the location of and to replace the fuel filter, see Fuel filter, replacement Removal and Replacement.
- To disconnect the pressure gauge, see Fuel pressure gauge Fuel Pressure Gauge.
Should the residual pressure be checked?
Yes - Checking residual pressure
No - DONE
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Checking residual pressure
- Switch off the ignition
- Reset fuel pump (FP) relay
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 injector, see Injector/pulse damper, replacement Removal and Replacement.
- For the location of and to replace the fuel pump (FP), see Fuel pump, replacement Fuel Pump, Replacement.
- 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
Continue - Verification
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Verification
Verification
Test drive the car according to the TRIP schedule.
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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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 for air leakage in the intake system
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