Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
![]() | ▶ Repair as necessary and go to "Verification of vehicle Repair" procedure. |
![]() | ▶ Go to "Power Circuit Inspection" procedure. |
Ignition "OFF".
Disconnect Brake Lamp Switch connector.
Ignition "ON".
Measure voltage between Pin No. 1 (Power) terminal of Brake Lamp Switch harness connector and chassis ground.
Specification : B+
Is measured value within specification?
![]() | ▶ Go to "Signal Circuit Inspection" procedure. |
![]() | ▶ Repair open or short in power circuit of Brake Lamp Switch and then go to "Verification of vehicle Repair" procedure. |
Ignition "OFF".
Disconnect Battery (-) terminal.
Refer to "Shop Manual" and disconnect Brake Lamp Switch and PCM connector.
Measure resistance between Pin No. 3 (Signal) terminal of Brake Lamp Switch harness connector and Pin No. 10 (Brake Test Switch) terminal of PCM harness connector.
Specification : Approx. below 1 Ω
Is measured value within specification?
![]() | ▶ Go to "Component Inspection" procedure. |
![]() | ▶ Repair open or short in signal circuit of Fuel Tank Level Sensor and then go to "Verification of vehicle Repair" procedure. |