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Work Procedure
1.INSPECTION START
  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:
    • 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 leaks
    • Air cleaner clogging
    • Gasket
  3. Confirm that electrical or mechanical loads are not applied.
    • Headlight 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 the middle of gauge.
    Ensure engine stays below 1,000 rpm.
  5. Run engine at about 2,000 rpm for about 2 minutes under no load.
  6. Make sure that no DTC is displayed with M.U.T.-III SE or GST.
Is any DTC detected?
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2.REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding Diagnostic Procedure.
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3.CHECK TARGET IDLE SPEED
  1. Run engine at about 2,000 rpm for about 2 minutes under no load.
  2. Rev engine (2,000 to 3,000 rpm) two or three times under no load, then run engine at idle speed for about 1 minute.
  3. Check idle speed.
    For procedure, Refer to IDLE SPEED : Periodic Maintenance.
    For specification, Refer to IGNITION TIMING : Service Data.
Is the inspection result normal?
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4.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
  1. Stop engine.
  2. Refer to DescriptionDescription.
: .
 
5.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Refer to DescriptionDescription.
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6.PERFORM IDLE AIR VOLUME LEARNING
Refer to Description.
Is Idle Air Volume Learning carried out successfully?
.
Follow the instruction of Idle Air Volume Learning. .
 
7.CHECK TARGET IDLE SPEED AGAIN
  1. Start engine and warm it up to normal operating temperature.
  2. Check idle speed.
    For procedure, Refer to IDLE SPEED : Periodic Maintenance.
    For specification, Refer to IGNITION TIMING : Service Data.
Is the inspection result normal?
.
.
 
8.DETECT MALFUNCTIONING PART
Check the Following.
Is the inspection result normal?
.
Repair or replace. Then .
 
9.CHECK ECM FUNCTION
  1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is a rare case.)
  2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to Work Procedure.
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10.CHECK IGNITION TIMING
  1. Run engine at idle.
  2. Check ignition timing with a timing light.
    Timing indicator
    For procedure,Refer to IGNITION TIMING : Periodic Maintenance.
    For specification, Refer to IGNITION TIMING : Service Data.
Is the inspection result normal?
INSPECTION END.
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11.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
  1. Stop engine.
  2. Refer to DescriptionDescription.
: .
 
12.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Refer to DescriptionDescription.
: .
 
13.PERFORM IDLE AIR VOLUME LEARNING
Refer to Description.
Is Idle Air Volume Learning carried out successfully?
.
Follow the instruction of Idle Air Volume Learning. Then .
 
14.CHECK TARGET IDLE SPEED AGAIN
  1. Start engine and warm it up to normal operating temperature.
  2. Check idle speed.
    For procedure, Refer to IDLE SPEED : Periodic Maintenance.
    For specification, Refer to IGNITION TIMING : Service Data.
Is the inspection result normal?
.
.
 
15.CHECK IGNITION TIMING AGAIN
  1. Run engine at idle.
  2. Check ignition timing with a timing light.
    Timing indicator
    For procedure, Refer to IGNITION TIMING : Periodic Maintenance.
    For specification, Refer to IGNITION TIMING : Service Data.
Is the inspection result normal?
INSPECTION END.
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16.CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to Removal and Installation.
Is the inspection result normal?
.
Repair the timing chain installation. Then .
 
17.DETECT MALFUNCTIONING PART
Check the following.
Is the inspection result normal?
.
Repair or replace. Then
 
18.CHECK ECM FUNCTION
  1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is a rare case.)
  2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to Work Procedure.
: .