Signal Circuit Inspection

Check voltage
1. IG "OFF" and disconnect ECTS connector.
2. IG "ON" and ENG "OFF"
3. Measure voltage between terminal 3 of ECTS harness connector and chassis ground.
  Specification: Approx. 5V
4. Is the measured voltage within specification?
  YES
  - Go to "GROUND CIRCUIT INSPECTION " procedure.
  NO
  - If voltage is 0V, go to step 3. If it is more than 5.1 V, go to step 2.
Check short to battery in harness
1. IG "OFF" and disconnect ECTS connector and ECM connector.
2. Measure resistance between terminals 2 and 3 of ECTS harness connector.
  Specification: Infinite
3. Is the measured resistance within specification?
  YES
  - Go to "COMPONENT INSPECTION " procedure.
  NO
  - Repair short to battery in harness, and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check open in harness
1. IG "OFF" and disconnect ECTS connector and ECM connector.
2. Measure resistance between terminal 3 of ECTS harness connector and terminal 7 of ECM harness connector (C144-B).
  Specification: Below 1Ω
3. Is the measured resistance within specification?
  YES
  - Go to "GROUND CIRCUIT INSPECTION " procedure.
  NO
  - Repair open in harness, and go to "VERIFICATION OF VEHICLE REPAIR " procedure.