| 1 |
CHECK GROUND CONNECTIONS
- Turn ignition switch OFF.
- Loosen and retighten three ground screws. Refer to
[POWER SUPPLY AND GROUND CIRCUIT CHECK
].
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OK or NG |
GO TO 2. |
Repair or replace ground connections. |
| 2 |
CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
- Disconnect A/F sensor 1 harness connector.
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- 2. Turn ignition switch ON.
- 3. Check voltage between A/F sensor 1 terminal 4 and ground with SDT or tester.
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Voltage: Battery voltage
OK or NG |
GO TO 4. |
GO TO 3. |
| 3 |
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- IPDM E/R connector E119
- 15 A fuse (No. 54)
- Harness for open or short between A/F sensor 1 and fuse
|
Repair or replace harness or connectors. |
|
| 4 |
CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check harness continuity between A/F sensor 1 terminal and ECM terminal as follows.
Refer to WIRING DIAGRAM
.
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Continuity should exist.
- 4. Check harness continuity between the following terminals and ground. Refer to WIRING DIAGRAM
.
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Continuity should not exist.
- 5. Also check harness for short to power.
OK or NG |
GO TO 5. |
Repair open circuit or short to ground or short to power in harness or connectors. |
| 5 |
CHECK INTERMITTENT INCIDENT
Perform
[SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT
]
OK or NG |
GO TO 6. |
Repair or replace. |
| 6 |
REPLACE A/F SENSOR 1
Replace malfunctioning A/F sensor 1. Refer to EXHAUST MANIFOLD AND THREE WAY CATALYST: EXPLODED VIEW [VQ40DE]
.
CAUTION:
- Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.
- Before installing new A/F sensor, clean exhaust system threads using Heated Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
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INSPECTION END |
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