Component Inspection

Component Inspection

Brake light switch Check
1. Ignition "ON" & Engine "OFF".
2. Disconnect the brake light switch connector.
3. Measure resistance between power terminal and signal terminal of the brake light switch A, B connector.
A. Specification :
Resistance between terminals of the brake light switch A - Infinity Ohms (when the plunger is pushed down), 0 Ohms (when the plunger isn't pushed down).
Resistance between the terminals of the brake light switch B - Infinity Ohms (when the plunger is not pushed down), 0 Ohms (when the plunger is pushed down).




4. Is the measured value within specifications ?
YES
1) Fault is intermittent caused by poor connection in brake light switch harness and/or HECU's connector.
Go to "Verification of Vehicle Repair" procedure.
NO
1) Substitute with a known-good brake light switch and check for proper operation.
If problem is corrected, replace brake light switch and then go to "Verification of Vehicle Repair" procedure.