3.
Has a problem been found?
 | ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure. |
 | ▶ Go to "Power Circuit Inspection" procedure. |
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 all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
Has a problem been found?
| ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure. |
| ▶ Go to "Power Circuit Inspection" procedure. |
Ignition switch "OFF"
Refer to "Shop Manual" and disconnect the brake switch connector.
Ignition switch "ON"
Measure the voltage between power terminal of brake switch harness connector and chassis ground.
Specification :B+
Ignition switch "OFF"
Refer to "Shop Manual" and disconnect brake switch connector.
Ignition switch "ON"
Measure the voltage between brake lamp switch power terminal of brake switch harness connector and chassis ground.
Specification :B+
Is the measured value within specification?
| ▶ Go to "Signal CIrcuit Inspection" procedure. |
| ▶ Inspect and repair open or short in circuit, and then go to "Verification of Vehicle Repair" procedure. |
Ignition switch "OFF"
Connect VMI to GDS and set up the Oscilloscope.(2 Channel):
Channel A (+) : Power terminal (Brake Switch Harness Connector)
Channel A (-) : Ground
Channel B (+) : Brake lamp switch power terminal (Brake Switch Harness Connector)
Channel B (-) : Ground
Ignition switch "ON" & Engine "OFF"
Inspection condition : Ignition switch "ON" & Brake pedal operation
Specification :
Brake pedal operation - Channel (A) : Approx. 0V / Channel (B) : B+
Brake operating - Pin No. 1 : B+ / Pin No. 3 : Approx. 0V
Is the measured value within specification?
| ▶ Go to "Component Inspection" procedure. |
| ▶ Inspect and repair open or short in circuit, and then go to "Verification of Vehicle Repair" procedure. |
