Lift the vehicle up.

Connect the probe of scan tool to the VSS terminal 3 and then, test the drive.

Check the VSS signal waveform when depressing the accelerator pedal fully one time.

IS THERE THE SIGNAL WAVEFORM PROPERLY DISPLAYED FROM LOW SPEED TO HIGH SPEED ?

YES

NO

a.

Recheck the fuse

b.

Recheck the wiring harness

c.

Go to step 5

WAVEFORM ANALYSIS

This test should be inspected after depressing the HOLD mode at the vehicle speed of 120 Km/h. The time T becomes shorter and frequency increases when the engine speed is increased. If unstable waveform pattern with non-uniform frequency or no signal, replace the VSS. When the ignition switch is ON, approx. 10V is checked at the VSS terminal 3 through the ECM to the speedometer. Unless there is the voltage at the VSS terminal 3, check the continuity between the speedometer and the ECM terminal 49/C230-1 or the reference voltage at the ECM terminal 49/C230-1 directly.

MONITORING FOR PENDING DTC SET ?

YES

NO