Component Inspection

P0118 Engine Coolant Temperature Circuit High Input

Inspection/Repair - Component Inspection

Component Inspection

1. Check ECTS resistance
(1) IG "OFF".
(2) Disconnect ECTS connector.
(3) Measure resistance between terminal 1 and 3 of ECTS harness connector. (Component Side)
A. Specification :









(4) Is the measured resistance within specification?
YES
1) Go to "Check ECM" as follows
NO
1) Substitute with a known - good ECTS and check for proper operation.
If the problem is corrected, replace ECTS and go to "Verification of Vehicle Repair" procedure.
2. Check ECM
(1) IG "OFF" and disconnect ECTS connector.
(2) Connect scantool and Key "ON".
(3) Select simulation function on scantool.
(4) Simulate voltage at terminal 1 of ECTS signal connector.




(5) Does the signal value of ECTS change 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 ECM and check for proper operation.
If the problem is corrected, replace ECM 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