Power Circuit Inspection
- Check voltage
- IG "OFF".
- Disconnect the PCM connector.
- IG "ON" and ENG "OFF"
- During taking off the brake : Measure the voltage between terminal 23 of PCM harness connector and chassis ground.
- During stepping on the brake : Measure the voltage between terminal 23 of PCM harness connector and chassis ground.
SPECIFICATION:
SPECIFICATIONItem During taking off the brake During stepping on the brake Brake Lamp Switch 0V Battery voltage Brake Switch Battery voltage 0V - Is the measured voltage within specification ?
YES
- Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Go to " 2Check open in harness" as follows.
- Check open in harness
- IG "OFF".
- Disconnect the brake switch and PCM connector.
- Measure the resistance between terminal 23 of PCM harness connector and terminal 2 of Brake switch harness side.
Specification : Approx. below 1Ω
- Is the measured resistance within specification ?
YES
- o to " 3Check voltage" as follows.
NO
- Repair open in circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- Check voltage
- IG "OFF".
- Disconnect the brake switch connector.
- Measure the voltage between brake lamp switch terminal and chassis ground.
- IG "ON" and ENG "OFF"
- Measure the voltage between brake lamp switch terminal and chassis ground.
SPECIFICATION:
SPECIFICATIONItem During taking off the brake During stepping on the brake Brake Lamp Switch Battery voltage Battery voltage Brake Switch 0V Battery voltage - Is the measured voltage within specification ?
YES
- Substitute with a known - good brake switch and check for proper operation. If the problem is corrected, replace brake switch and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Check the fuse between battery and brake switch.
- Repair open or short in power circuit of brake switch and go to "VERIFICATION OF VEHICLE REPAIR " procedure.