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 in harness

(1)

Ignition "OFF"

(2)

Disconnect HO2 sensor connector and PCM connector.

(3)

Measure resistance between terminal 1 of HO2 sensor harness connector and terminal 3 /C21-C of PCM harness connector.

Specification : Approx.below 1Ω

(4)

Is the measured resistance within specifications?

YES

▶ Go to " Ground Circuit Inspection " procedure.

NO

▶ Check open in harenss between HO2S harness connector and PCM connector.

▶ Repair or replace as necessary and then, go to " Verification of Vehicle Repair " procedure.

Ground Circuit inspection
1.

Check for open in harness

(1)

Ignition "OFF"

(2)

Disconnect HO2 sensor.

(3)

Measure resistance between terminal 2 of HO2 sensor harness connector and chassis ground.

Specification : Approx. below 1Ω

(4)

Is the measured resistance within specifications?

YES

▶ Go to " Component Inspection " procedure.

NO

▶ Check open in harenss between HO2S connector and PCM connector.

▶ Repair or replace as necessary and then, go to " Verification of Vehicle Repair " procedure.

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