Component Inspection

Component Inspection

1. Check ECTS.
(1) Ignition "OFF"
(2) Disconnect ECTS connector
(3) Measure resistance between terminals "1" and "3" of the ECT sensor (to ECT sensor side).
A. Specification :









(4) Is the measured resistance within specifications ?
YES
1) Go to "Check PCM" as below.
NO
1) Substitute with a known-good ECT sensor and check for proper operation. If the problem is corrected, replace ECT sensor and go to "Verification of Vehicle Repair" procedure.
2. Check PCM
(1) Ignition "OFF".
(2) Connect Scantool and Ignition "ON" & Engine "OFF"
(3) Select simulation function on scantool.
(4) Simulate voltage at terminal "3" of ECT sensor signal connector.




(5) Does the signal value of ECT sensor changes according to simulation voltage ?
YES
1) Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
NO
1) Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" procedure.

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