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.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
YES
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
▶ Go to " Power Circuit Inspection " procedure.
Check Voltage
Ignition "ON" & engine "OFF"
Disconnect VSS connector
Measure voltage between terminal 1 of VSS harness connector and chassis ground
Specification : Approx. 12V
Is the measured voltage within specifications?
YES
▶ Go to " Ground Circuit Inspection" procedure.
NO
▶ Repair or replace as necessary and then, go to " Verification of Vehicle Repair" procedure.
Check for open in harness
Ignition "OFF"
Disconnect VSS connector
Measure resistance between terminal 2 of VSS harness connector and chassis ground.
Specification : Approx. 0Ω
Is the measured resistance within specifications?
YES
▶ Go to "Signal circuit inspection" as below
NO
▶ Repair or replace as necessary and then, go to " Verification of Vehicle Repair" procedure.
Check for open in harness
Ignition "OFF"
Disconnect VSS connector and PCM connector.
Measure resistance between terminal 3 of VSS harness connector and10 of PCM harness connector.
Specification : Approx. 0Ω
Is the measured resistance within specifications?
YES
▶ Go to " Check for short to ground " procedure.
NO
▶ Repair or replace as necessary and then, go to " Verification of Vehicle Repair" procedure.
Check for short to ground
Ignition "OFF"
Disconnect VSS connector
Measure resistance between terminal 3 of VSS harness connector and chassis gorund.
Specification : infinite (∞Ω)
Is the measured resistance within specifications?
YES
▶ Go to "Check for short to battery" procedure.
NO
▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.
Check for short to battery
Ignition "ON" & engine "OFF"
Disconnect VSS connector
Measure voltage between terminal 3 of VSS harness connector and chassis gorund.
Specification : Approx. 0V
Is the measured resistance within specifications?
YES
▶ Go to "Component inspection" procedure.
NO
▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.
