Short Check
- IG "OFF".
- Disconnect Brake Lamp Relay(HAC relay) and HECU connector
- Measure resistance between control terminal of brake lamp relay(HAC relay) harness connector and chassis ground.
Specification: Infinite (∞ Ω)
- Is the measured value within specifications?
YES
- Substitute with a known-good Brake Lamp Relay(HAC relay) and check for proper operation. If problem is corrected, replace Brake Lamp Relay(HAC relay) and then go to Verification Of Vehicle Repair procedure below.
NO
- Repair short in control circuit between Brake Lamp Relay(HAC relay) and HECU, and then go to Verification Of Vehicle Repair procedure below.