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ENGINE DRIVEABILITY AND EMISSIONS 6E–189 6 Using the DVM and check the VSS signal. 1. Ignition “On”, vehicle “Run (lift up)”. 2. Measure the VSS output voltage at sensor, meter, immobiliser control unit (if equipped) and ECM. Does the tester indicate specified value? If a oscilloscope is available, monitor the VSS signal. Refer to Diagnostic Aids and Go to Step 21 Refer the table Step Action Value(s) Yes No Measurement Position Voltage (V) (AC Range) If No Good VSS terminal 3 & GND Approximately 7.0 V at 20km/h Go to Step 7 Meter B24 connector 9 & Go to Step 11 Meter B24 connector 10 & Go to Step 13 Immobiliser control unit B68 Go to Step 14 Immobiliser control unit B68 Approximately 4.8 V at 20km/h Go to Step 16 ECM C56 (J2) connector 23 & Go to Step 17 Vehicle Speed Sensor Reference Wave Form 0V → Measurement Scale: 10V/div 50ms/div Vehicle Speed Sensor Reference Wave Form 0V → Measurement Scale: 10V/div 50ms/div |