Control Circuit Inspection

■ Open Check 

1. IG "OFF".
2. Disconnect Stop Signal Electronic Module (SSEM) and HECU connector.
3. Measure resistance between ESS control terminal of Stop Signal Electronic Module (SSEM) harness connector and ESS brake lamp control terminal of HECU harness connector.

   Specification  :Approx. below 1Ω

4. Is the measured value within specifications?

   YES 

   • Go to "Short Check" procedure.

   NO 

   • Repair open in control circuit between the Stop Signal Electronic Module (SSEM) and HECU and then, Go to "VERIFICATION OF VEHICLE REPAIR " procedure.

■ Short Check (to ground) 

1. IG "OFF".
2. Disconnect Stop Signal Electronic Module (SSEM) and HECU connector.
3. Measure resistance between ESS control terminal of Stop Signal Electronic Module (SSEM) harness connector and chassis ground.

   Specification  :Infinite (∞Ω)

4. Is the measured value within specifications?

   YES 

   • Go to next procedure.

   NO 

   • Repair open in control circuit between the Stop Signal Electronic Module (SSEM) and HECU and then, Go to "VERIFICATION OF VEHICLE REPAIR " procedure.

■ Short Check (to power) 

1. IG "OFF".
2. Disconnect Stop Signal Electronic Module (SSEM) and HECU connector.
3. IG "ON".
4. Measure voltage between ESS control terminal of Stop Signal Electronic Module (SSEM) harness connector and chassis ground.

   Specification  :Approx. 0V

5. Is the measured value within specifications?

   YES 

   • Substitute with a known-good Stop Signal Electronic Module (SSEM) and check for proper operation. If problem is corrected, replace Stop Signal Electronic Module (SSEM) and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

   NO 

   • Repair short in control circuit between Stop Signal Electronic Module (SSEM) and HECU, and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.