IG "OFF".
Disconnect the brake light switch connector.
Measure resistance between power terminal and siganl terminal of the brake light switch connector.
Specification :
Resistance between terminals of the brake light switch - ∞Ω (when the plunger is pushed down), 0Ω (when the plunger isn't pushed down)
Resistance between the terminals of the brake switch - ∞Ω (when the plunger is not pushed down), 0Ω (when the plunger is pushed down)
Is the measured resistance within specifications ?
 | ▶ Fault is intermittent caused by poor connection in brake light switch harness and/or HECU's connector. Go to "Verification of Vehicle Repair" procedure. |
 | ▶ 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. |
