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

Repair as necessary and go to "Verification of Vehicle Repair" procedure.

NO

Go to " Power Circuit Inspection " procedure.

Power Supply Circuit Inspection
1.

Check for short in harness

(1)

Ignition "OFF".

(2)

Disconnect throttle acutator connector.

(3)

Ignition "ON" & Engine "OFF".

(4)

Measure voltage between terminal "1" of the sensor harness connector and chassis ground.

Specification : 4.8V ~ 5.1V

(5)

Is the measured voltage within specifications ?

YES

▶ Go to "Control Inspection" procedure.

NO

▶ Check for short to battery or ground in the throttle acutator power harness.

Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Control Circuit Inspection
1.

Check for short to battery in harness.

(1)

Ignition "OFF".

(2)

Disconnect throttle acutator connector.

(3)

Ignition " ON" & Engine " OFF".

(4)

Measure voltage between terminal 2 of the throttle actuator harness connector and chassis ground.

Specification : Approx. below 1V

(5)

Is the measured voltage within specificaitons ?

YES

▶ Go to " Check for short to ground in harness " as below.

NO

▶ Check for short to battery in control harness.

Repair as necessary and go to "Verification of Vehicle Repair" procedure.

2.

Check for short to ground in harness.

(1)

Ignition "OFF".

(2)

Disconnect throttle acutator connector.

(3)

Measure resistance between terminal 2 of the throttle actuator harness connector and chassis ground.

Specification : Infinite

(4)

Is the measured resistance within specifications ?

YES

▶ Go to " Check for open in harness " as below.

NO

▶ Check for short to ground in control harness.

Repair as necessary and go to "Verification of Vehicle Repair" procedure .

3.

Check for open in harness.

(1)

Ignition "OFF" & Engine "OFF".

(2)

Disconnect Throttle actuator and ECM connector.

(3)

Measure resistance between terminal 2 of the sensor harness connector and terminal 18 ECM harenss connector.

Specification : Approx. below 1Ω

(4)

Is the measued resistance within specifications ?

YES

▶ Go to "Component Inspection" procedure.

NO

▶ Check for open in harness.

Repair as necessary and go to "Verification of of Vehicle Repair" procedure .

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