W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found ?
YES
1) Repair as necessary and go to "Verification Vehicle Repair" procedure.
NO
1) Go to "W/Harness Inspection" procedure.

Signal Circuit Inspection

1. Check for open in harness
1. Ignition "OFF" & engine "OFF"
2. Disconnect "VEHICLE SPEED SENSOR" and "PTG module" connector.
3. Measure resistance between terminal of PTG and terminal of vehicle speed sensor.
A. Specification :Approx. 0 Ohms




4. Is the measured resistance within specifications ?
YES
1) Go to "Check for short in harness" procedure.
NO
1) Check for open in signal harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
2. Check for short in harness
1. Ignition "OFF" & engine "OFF"
2. Disconnect "VEHICLE SPEED SENSOR" connector.
3. Measure resistance between terminal of PTG and chassis ground.
A. Specification :Approx. Infinity Ohms




4. Is the measured resistance within specifications ?
YES
1) Go to "Power circuit Inspection" procedure.
NO
1) Check for short in signal harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Power Supply Circuit Inspection

1. Check for open/short in harness
1. Ignition "OFF"
2. Disconnect VSS connector.
3. Ignition "ON".
4. Measure voltage between terminal of vehicle speed sensor and chassis ground.
A. Specification : 9 - 16V.




5. Is the measured voltage within specifications ?
YES
1) Go to "Ground circuit Inspection" procedure.
NO
1) Check for open or short in harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Ground Circuit inspection

1. Check for open/short in harness
1. Ignition "OFF"
2. Disconnect VSS connector.
3. Ignition "ON"
4. Measure voltage between terminal of vehicle speed sensor and chassis ground.
5. Measure voltage between terminal "1" and "2" of vehicle speed sensor.
A. Specification : | (Voltage from procedure 4) - (Voltage from procedure 5) | < 200 mV








6. Is the difference between two measured voltage within specifications ?
YES
1) Go to "Component Inspection" procedure.
NO
1) Check for open/short circuit in ground harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.