4.
Measure voltage between terminal 3 of the coil harness connector and chassis ground.
Specification : Approx. B+
Many malfunctions in the electrical system are caused by poor harness(es) 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 Supply Circuit Inspection" procedure.
Ignition "OFF".
Disconnect ignition coil connector.
Ignition "ON" & Engine "OFF".
Measure voltage between terminal 3 of the coil harness connector and chassis ground.
Specification : Approx. B+
Is voltage within the specification?
YES
▶ Go to "Control Circuit Inspection" procedure
NO
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Check for open in signal harness.
Ignition "OFF".
Measure resistance from each ignition coil control circuit to ECM.
Specification : Approx. 0Ω
Is resistance within the specification?
YES
▶ Go to next step as below.
NO
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Check for short to ground in signal harness.
Measure resistance from each ignition coil control circuit (4/C14, 1/C14, 2/C14) to chassis ground.
Specification : Infinite
Is resistance within the specification?
YES
▶ Go to next step as below.
NO
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
Check for short to battery in signal harness.
Disconnect ECM connector.
Ignition "ON" & Engine "OFF".
Measure voltage from each ignition coil control circuit (4/C14, 1/C14, 2/C14) to chassis ground.
Specification : Approx. 0V
Is voltage within the specification?
YES
▶ Go to "Component Inspection" procedure.
NO
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
