W/Harness Inspection

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
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
1) Go to "Power Supply Circuit Inspection" procedure.

Power Supply Circuit Inspection

1. IG "OFF" and disconnect MAPS connector.
2. IG "ON" & ENG "OFF"
3. Measure voltage between terminal 2 of MAPS harness connector and chassis ground.
A. Specification: Approx. 5V




4. Is the measured voltage within specification ?
YES
1) Go to "Ground circuit inspection" procedure.
NO
1) Repair open or short to ground in harness and go to "Verification of Vehicle Repair" procedure.

Ground Circuit inspection

1. IG "OFF" and disconnect MAPS connector.
2. Measure voltage between terminal 2 of MAPS harness connector and chassis ground.
3. Measure voltage between terminal 2 and 4 of MAPS harness connector.
A. Specification: Voltage difference between Measurement "A" and "B" is below 200 mV.








4. Is the measured voltage within specification ?
YES
1) Go to "Signal Circuit Inspection" procedure.
NO
1) Repair contact resistance or open in harness and then go to "Verification of Vehicle Repair" procedure.

Signal Circuit Inspection

1. Check voltage
(1) IG "OFF" and disconnect MAPS connector.
(2) IG "ON" & ENG "OFF"
(3) Measure voltage between terminal 1 of MAPS harness connector and chassis ground.
A. Specification: Approx. 0V




(4) Is the measured voltage within specification ?
YES
1) Go to "Check open in harness" as follows.
NO
1) Repair short to battery in harness and go to "Verification of Vehicle Repair" procedure.
2. Check open in harness
(1) IG "OFF" and disconnect MAPS and PCM connector.
(2) Measure resistance between terminal 1 of MAPS harness connector and terminal 8 of PCM harness connector.
A. Specification: Approx. Below 1 Ohm




(3) Is the measured resistance within specification ?
YES
1) Go to "Component Inspection" procedure.
NO
1) Repair open in harness and go to "Verification of Vehicle Repair" procedure.