Main Power Supply And Ground Circuit

MAIN POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure


1. CHECK TCM POWER CIRCUIT 1

1.Turn the ignition switch OFF.
2.Disconnect the TCM connector.
3.Check the voltage between the TCM harness connector terminals and ground.





Is the inspection result normal?
YES- GO TO 2.
NO- GO TO 4.

2. CHECK TCM POWER CIRCUIT 2

Check the voltage between the TCM harness connector terminals and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 5.

3. CHECK TCM GROUND CIRCUIT

Check the continuity between TCM harness connector terminals and ground.





Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Repair or replace the malfunctioning parts.

4. DETECT MALFUNCTION ITEMS (PART 1)

Check the following items:
- Open or short circuit of the harness between battery positive terminal and TCM connectors terminal 45.
- 10A fuse [No.25, fuse block (J/B)]. Refer to "Terminal Arrangement" Fuse Block - Junction Box (J/B).
Is the inspection result normal?
YES - Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Repair or replace the malfunctioning parts.

5. DETECT MALFUNCTION ITEMS (PART 2)

Check the following items:
- Open or short circuit of the harness between IPDM E/R harness connector terminal 21 and TCM connector terminals 47, 48.
- Harness open circuit or short circuit between the ignition switch and IPDM E/R. Refer to "Wiring Diagram Ignition Power Supply -" Ignition Power Supply.
- 10A fuse [No.49, IPDM E/R]. Refer to "IPDM E/R Terminal Arrangement" IPDM E/R Terminal Arrangement.
- IPDM E/R
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Repair or replace the malfunctioning parts.