W/Harness Inspection

Electronic Stability Control
C2126 Vacuum Pump Relay Drive Pin Open/Short - Inspection/Repair:_:W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminal condition. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?






Power Circuit Inspection

Open or Short Check
1. Ignition "OFF"
2. Disconnect Vacuum Pump Relay.
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between power terminal of Vacuum Pump Relay harness connector and chassis ground.

Specification :Battery voltage




5. Is the measured value within specifications?






Control Circuit Inspection

Open Check
1. Ignition "OFF"
2. Disconnect Vacuum Pump Relay and HECU connector.
3. Measure resistance between control terminal of Vacuum Pump Relay harness connector and Vacuum Pump Relay control terminal of HECU harness connector.

Specification :Approx. below 1Ohms




4. Is the measured value within specifications?





Short Check
1. Ignition "OFF"
2. Disconnect Vacuum Pump Relay and HECU connector.
3. Measure resistance between control terminal of Vacuum Pump Relay harness connector and chassis ground.

Specification :Infinite (Infinity Ohms)




4. Is the measured value within specifications?