For California

POWER SUPPLY AND GROUND CIRCUIT


Diagnosis Procedure

1.INSPECTION START
Start engine.
Is engine running?
Yes or No
Yes - GO TO 8.
No - GO TO 2.
2.CHECK ECM POWER SUPPLY CIRCUIT-I
1. Turn ignition switch OFF and then ON.





2. Check voltage between ECM terminal 93 and ground with CONSULT-III or tester.

Voltage: Battery voltage

OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M6, E19
- Harness for open or short between ECM and ignition switch
- Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.





2. Loosen and retighten ground screws on the body. For California.
Arrow indicates Vehicle front
- Body ground (1)
OK or NG
OK - GO TO 5.
NG - Repair or replace ground connections.
5.CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 11, 107, 108, 109, 112 and ground. Refer to Wiring Diagram.

Continuity should exist.

3. Also check harness for short to power.
OK or NG
OK - GO TO 7.
NG - GO TO 6.
6.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F10, E17
- Harness for open or short between ECM and ground
- Repair open circuit or short to power in harness or connectors.
7.CHECK ECM POWER SUPPLY CIRCUIT-II
1. Reconnect ECM harness connector.
2. Turn ignition switch ON.





3. Check voltage between IPDM E/R terminal 3 and ground with
CONSULT-III or tester.

Voltage: Battery voltage

OK or NG
OK - Go to For California.
NG - GO TO 8.
8.CHECK ECM POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON and then OFF.





3. Check voltage between ECM terminal 105 and ground with
CONSULT-III or tester.

Voltage: After turning ignition switch OFF, battery voltage will exist for a few seconds, then drop approximately 0 V.

OK or NG
OK - GO TO 14.
NG (Battery voltage does not exist.)-GO TO 9.
NG (Battery voltage exists for more than a few seconds.)-GO TO 11.
9.CHECK ECM POWER SUPPLY CIRCUIT-IV
1. Turn ignition switch OFF and wait at least 10 seconds.





2. Check voltage between ECM terminal 32 and ground with CONSULT-III or tester.

Voltage: Battery voltage

OK or NG
OK - GO TO 10.
NG - GO TO 11.
10.CHECK ECM POWER SUPPLY CIRCUIT-V
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E43.
3. Check harness continuity between ECM terminal 105 and IPDM E/R terminal 4. Refer to Wiring Diagram.

Continuity should exist.

4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 17.
NG - Repair open circuit or short to ground or short to power in harness or connectors.
11.CHECK ECM POWER SUPPLY CIRCUIT-VI
1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E43.
3. Check harness continuity between ECM terminal 32 and IPDM E/R terminal 7. Refer to Wiring Diagram.

Continuity should exist.

4. Also check harness for short to ground and short to power.
OK or NG
OK - GO TO 13.
NG - GO TO 12.
12.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E7, F10
- Harness for open or short between ECM and IPDM E/R
- Repair open circuit or short to ground or short to power in harness or connectors.
13.CHECK 20 A FUSE
1. Disconnect 20 A fuse from IPDM E/R.
2. Check 20 A fuse.
OK or NG
OK - GO TO 17.
NG - Replace 20 A fuse.
14.CHECK GROUND CONNECTIONS
Loosen and retighten ground screws on the body. For California.





Arrow Indicates Vehicle front
- Body ground (1)
OK or NG
OK - GO TO 15.
NG - Repair or replace ground connections.
15.CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals 10, 11, 108 and ground. Refer to Wiring Diagram.

Continuity should exist.

3. Also check harness for short to power.
OK or NG
OK - GO TO 17.
NG - GO TO 16.
16.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors F10, E17
- Harness for open or short between ECM and ground
- Repair open circuit or short to power in harness or connectors.
17.CHECK INTERMITTENT INCIDENT
For California For California.
OK or NG
OK - Replace IPDM E/R. System Description.
NG - Repair open circuit or short to power in harness or connectors.