ENGINE TUNE-UP [LF]

#
ENGINE TUNE-UP [LF]

B3E011001001W06

## Engine Tune-up Preparation

1. Turn off all electrical loads.

2. Warm up the engine as follows.

  (1) Start the engine.
  (2) Maintain the engine speed 2,500-3,000 rpm until the cooling fans start to operate.
  (3) Release the accelerator pedal.
  (4) Wait until the cooling fans stop.

3. Connect the SST (WDS or equivalent) to the DLC-2.

## Ignition Timing Inspection

  Note

  • Ignition timing is not adjustable.
  • Ignition timing verification requires WDS or equivalent.

1. Verify that the ignition timing (WDS: SPARKADV PID) is within the specification using WDS or equivalent.

  Ignition timing
  Approx. BTDC 8°

2. Verify that ignition timing advances when the engine speed increases gradually.

## Idle Speed Inspection

  Note

  • Idle speed is not adjustable.
  • Idle speed verification requires WDS or equivalent.

1. Verify that the idle speed (WDS: RPM PID) is within the specification using WDS or equivalent.

  Idle speed

  Condition | Engine speed (rpm)*1
  --- | ---
  MTX | ATX
  Neutral position | N range | D range
  No load | 600-700 | 650-750 | 600-700
  Electrical loads*2 ON (38-48A) | 650-750 | 650-750 | 600-700
  Electrical loads*2 ON (Above 48A) | 700-800 | 700-800 | 670-770
  A/C ON and refrigerant pressure switch (middle) OFF | 700-800 | 650-750 | 650-750
  A/C ON and refrigerant pressure switch (middle) ON | 700-800 | 750-850 | 750-850

  *1 :
Excludes temporary idle speed drop just after the electrical loads are turned on.
  *2 :
Alternator generating current value.

## Idle Mixture Inspection

1. Verify that the idle speed and ignition timing are within the specification. (See Idle Speed Inspection.) (See Ignition Timing Inspection.)

2. Insert an exhaust gas analyzer to the tailpipe.

3. Verify that the CO and HC concentrations are within the regulation.