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 "Signal Circuit Inspection" procedure.

Signal Circuit Inspection
1.

Check for open or short in APS 2 Signal harness

(1)

Ignition "OFF".

(2)

Disconnect APS sensor connector.

(3)

Ignition "ON" & Engine "OFF".

(4)

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

Specification : 4.8 ~ 5.1V

(5)

Is the measured voltage within specifications ?

YES

▶ Go to "Check for open or short in APS1 Signal harness" as below.

NO

▶ Check for open or short in APS2 signal harness. Repair as necessary and go to "Verification vehicle Repair" procedure.

2.

Check for open or short in APS1 signal harness

(1)

Ignition "OFF"

(2)

Disconnect AP sensor connector

(3)

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

Specification : 4.8 ~ 5.1V

(4)

Is the measured voltage within specifications ?

YES

▶ Go to "Ground Circuit Inspection" procedure.

NO

▶ Check for open or short in APS1 harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

Ground Circuit inspection
1.

Check for open in APS2 harness.

(1)

Ignition "OFF".

(2)

Disconnect AP sensor and ECM connector.

(3)

Measure resistance between terminal 4 of the sensor harness connector and terminal 79 of ECM harness connector

Specification : Approx.below 1Ω

(4)

Is the measured resistance within specifications ?

YES

▶ Go to "Check for open in APS1 ground harness" as below.

NO

▶ Check for open in APS2 ground harness. Repair as necessary and go to "Verification of Vehicle Repair" procedure.

2.

Check for open in APS1 harness

(1)

Ignition "OFF".

(2)

Disconnect AP sensor and ECM connector.

(3)

Measure resistance between terminal 5 of the sensor harness connector and terminal 76 of ECM harness connector.

Specification : Approx.below 1Ω

(4)

Is the measured resistance within specifications ?

YES

▶ Go to "Component Inspection" procedure.

NO

▶ Check for open in APS1 ground harness. Repair as necessary and go to "Verification vehicle Repair" procedure.

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