Work Procedure

1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for scheduled maintenance.
2. Open engine hood and check the following:

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   • Harness connectors for improper connections
   • Wiring harness for improper connections, pinches and cut
   • Vacuum hoses for splits, kinks and improper connections
   • Hoses and ducts for leakage
   • Air cleaner clogging
   • Gasket
3. Check that electrical or mechanical loads are not applied.
   • Headlamp switch is OFF.
   • Air conditioner switch is OFF.
   • Rear window defogger switch is OFF.
   • Steering wheel is in the straight-ahead position, etc.
4. Start engine and warm it up until engine coolant temperature indicator points to the middle of gauge.

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   Check that engine stays below 1, 000 rpm.

5. Run engine at approximately 2, 000 rpm for approximately 2 minutes under no load.

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6. Check that no DTC is displayed with CONSULT or GST.

Are any DTCs detected?

YES

GO TO 2.

NO

GO TO 3.

Repair or replace components as necessary according to corresponding Diagnosis Procedure.

GO TO 3

1. Run engine at approximately 2, 000 rpm for approximately 2 minutes under no load.
2. Rev engine between 2, 000 and 3, 000 rpm 2 or 3 times under no load, then run engine at idle speed for approximately 1 minute.

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3. Check idle speed.

   For procedure, Refer to IDLE SPEED : Periodic Maintenance Operation .

   For specification, Refer to IDLE SPEED : Service Data .

Is the inspection result normal?

YES

GO TO 10.

NO

GO TO 4.

1. Stop engine.
2. Refer to Work Procedure .

GO TO 5.

Refer to Work Procedure .

GO TO 6.

Refer to Work Procedure .

Is Idle Air Volume Learning carried out successfully?

YES

GO TO 7.

NO

Follow the instruction of Idle Air Volume Learning. Then GO TO 4.

1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.

   For procedure, Refer to IDLE SPEED : Periodic Maintenance Operation .

   For specification, Refer to IDLE SPEED : Service Data .

Is the inspection result normal?

YES

GO TO 10.

NO

GO TO 8.

Check the Following.

• Check camshaft position sensor and circuit. Refer to DTC Description . or Refer to DTC Description .
• Check crankshaft position sensor and circuit. Refer to DTC Logic .

Is the inspection result normal?

YES

GO TO 9.

NO

Repair or replace malfunctioning part. Then GO TO 4.

1. Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident, although this is rare.)
2. Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to Work Procedure .

GO TO 4.

1. Run engine at idle.
2. Check ignition timing with a timing light.

   For procedure, Refer to IGNITION TIMING : Periodic Maintenance Operation .

   For specification, Refer to IGNITION TIMING : Service Data .

Is the inspection result normal?

YES

GO TO 19.

NO

GO TO 11.

1. Stop engine.
2. Perform Refer to Work Procedure .

GO TO 12.

Perform Refer to Work Procedure .

GO TO 13.

Perform Work Procedure .

Is Idle Air Volume Learning carried out successfully?

YES

GO TO 14.

NO

Follow the instruction of Idle Air Volume Learning. Then GO TO 4.

1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.

   For procedure, Refer to IDLE SPEED : Periodic Maintenance Operation .

   For specification, Refer to IDLE SPEED : Service Data .

Is the inspection result normal?

YES

GO TO 15.

NO

GO TO 17.

1. Run engine at idle.
2. Check ignition timing with a timing light.

   For procedure, Refer to IGNITION TIMING : Periodic Maintenance Operation .

   For specification, Refer to IGNITION TIMING : Service Data .

Is the inspection result normal?

YES

GO TO 19.

NO

GO TO 16.

Check timing chain installation. Refer to Removal and Installation .

Is the inspection result normal?

YES

GO TO 17.

NO

Repair the timing chain installation. Then GO TO 4.

Check the following.

• Check camshaft position sensor and circuit. Refer to DTC Description . or Refer to DTC Description .
• Check crankshaft position sensor and circuit. Refer to DTC Logic .

Is the inspection result normal?

YES

GO TO 18.

NO

Repair or replace malfunctioning part. Then GO TO 4.

1. Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident, although this is rare.)
2. Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to Work Procedure .

GO TO 4.

If ECM is replaced during this BASIC INSPECTION procedure, perform "Work Procedure". Refer to Work Procedure .

INSPECTION END