Module Circuit Inspection

Power Circuit Inspection

Ignition "OFF"
Refer to "HYBRID POWER CONTROL UNIT (HPCU) " and disconnect HPCU connector.
Ignition "ON"
Measure voltage between Pin No. 4, 5, 6 (Power) terminal of HPCU harness connector and chassis ground.
Measure voltage between Pin No. 34 (ON/Start Input) terminal of HPCU harness connector and chassis ground.
Specification: B+
Is measured value within specification?
YES
- Go to "Ground Circuit Inspection" procedure below.
NO
- Repair open or short in power circuit, and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

Ground Circuit Inspection

Ignition "OFF"
Disconnect Battery (-) terminal.
Refer to "HYBRID POWER CONTROL UNIT (HPCU) " and disconnect HPCU connector.
Measure resistance between Pin No. 1, 2, 3 (Ground) terminal of HPCU harness connector and chassis ground.
Specification: Approx. below 1Ω
Is measured value within specification?
YES
- Go to "Open in CAN Communication Line Inspection" procedure below.
NO
- Repair open or short in ground circuit, and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

Open in CAN Communication Line Inspection

Ignition "OFF"
Disconnect Battery (-) terminal.
Disconnect PCM and HPCU connectors.
Measure resistance between Pin No. 77 (P-CAN High) terminal of PCM and Pin No. 78 (P-CAN High) terminal of HPCU.
Measure resistance between Pin No. 60 (P-CAN Low) terminal of PCM and Pin No. 79 (P-CAN Low) terminal of HPCU.
Specification: Approx. below 1Ω
Is measured value within specification?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- Repair short in P-CAN Communication circuit or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.