Signal Circuit Inspection

Open or Short Check
1. IG "OFF".
2. Disconnect ESC (ESP) switch harness connector.
3. IG "ON".
4. Measure voltage between signal terminal of the ESC (ESP) switch harness connector and chassis ground.
  Specification: Approx. 0V
5. IG "OFF".
6. Disconnect ESC (ESP) switch harness connector.
7. Measure resistance between signal terminal of the ESC (ESP) switch harness connector and chassis ground.
  Specification: Approx. ∞Ω
8. IG "OFF".
9. Disconnect ESC (ESP) switch and HECU harness connector.
10. Measure resistance between signal terminal of the ESC (ESP) switch and HECU.
  Specification: Approx. below 1Ω
11. Is the measured value within specifications?
  YES
  - Go to "COMPONENT INSPECTION " Procedure.
  NO
  - Repair open or short in signal circuit and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.