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 Power Supply
Ignition "OFF"
Disconnect CMPS connector.
Ignition " ON " & Engine "OFF"
Measure voltage between terminal "3" of CMP sensor harness connector and chassis ground.
Specification : B+
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 CMPS connector and ECM connector.
Measure resistance between terminal "1" of CMPS harness connector and chassis ground.
Specification : Approx.0Ω
Is the measured resistance within specifications?
YES
▶ Go to "Signal 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 CMPS connector and ECM connector.
Measure resistance between terminal "2" of CMPS harness connector and 16 of the ECM harness connector.
Specification : Approx.0Ω
Is the measured resistance within specifications?
YES
▶ Go to "Check for short to ground in harness"
NO
▶ Repair or replace as necessary and then, go to " Verification of Vehicle Repair" procedure.
Check for short to ground in harness.
Ignition "OFF"
Disconnect CMPS connector.
Measure resistance between terminal "2" of CMPS harness connector and chassis ground.
Specification : Approx. ∞ Ω
Is the measured resistance within specifications?
YES
▶ Go to "Check for short to battery in harness"
NO
▶ Repair or replace as necessary and then, go to " Verification of Vehicle Repair" procedure.
Check for short to battery in harness.
Ignition "OFF"
Disconnect CMPS connector.
Ignition "ON" & Engine "OFF"
Measure voltage between terminal "2" of CMPS harness connector and chassis ground.
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.
