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 ?






Signal Circuit Inspection

NOTE:
This procedure is applied to vehicle with ABS (or ESC)
In case of no ABS (or ESC), refer to "C1203 Wheel speed sensor front-RH open/short".

1. Check short to ground in harness
(1) IG "OFF"
(2) Disconnect PCM connector and ABS or ESC control module connector.
(3) Measure resistance between terminal 52 of PCM harness connector and chassis ground.

Specification : Infinite





(4) Is the measured resistance within specifications ?





2. Check for open in harness
(1) Ignition "OFF"
(2) Disconnect PCM connector and ABS or ESC control module connector.
(3) Measure resistance between terminal "52" of PCM harness connector and terminal "21" of ESC control module harness connector.

Specification : Approx. below 1 ohms






NOTE: This picture is only applied to vehicle with ESC

(4) Is the measured resistance within specifications ?





3. Check wheel speed sensor
(1) IG "OFF"
(2) Check open or short in wheel speed sensor (Refer to "C1203 Wheel speed sensor front-RH open/short") C1203
(3) Is the wheel speed sensor normal ?






NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM. After testing PCM on the vehicle, use this function to reuse the PCM on the others