Signal Too High / Signal Too Low: Verification: Verification

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

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS CORPORATION

Ignition off
Reconnect the connectors, reinstall components etc.
Test drive the car at an even speed (engine speed (RPM) above 2000 RPM) for at least 10 minutes
Release the accelerator pedal (AP) quickly at least three times to simulate fuel shut-off
Connect VCT2000 (or appropriate scan tool) to the data link connector (DLC) without switching off the engine.
NOTE:
If the engine is switched off, the stored fault status will be erased and the test drive will have to be repeated.

Read out the deviation between the front and rear heated oxygen sensor (HO2S).

Check that the value is between -0.03 and +0.03.

Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
Courtesy of VOLVO CARS CORPORATION

Is the value OK?