Inspection Procedure

HINT:

Hand-held tester only:

It is possible the malfunctioning area can be found using the ACTIVE TEST A/F CONTROL operation. The A/F CONTROL operation can determine if the A/F sensor, heated oxygen sensor or other potential trouble areas are malfunctioning or not.

1. Perform the ACTIVE TEST A/F CONTROL operation.

   HINT:

   The A/F CONTROL operation lowers the injection volume 12.5% or increases the injection volume 25%.

   1. Connect the hand-held tester to the DLC3 on the vehicle.
   2. Turn the ignition switch to ON.
   3. Warm up the engine by running the engine at 2,500 rpm for approximately 90 seconds.
   4. Select the item: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / A/F CONTROL.
   5. Perform the A/F CONTROL operation with the engine in an idle condition (press the right or left button).

1. Result: 
2. A/F sensor reacts in accordance with increase and decrease of injection volume: 
3. +25 % --> rich output: Less than 3.0 V 
4. -12.5 % --> lean output: More than 3.35 V 
5. Heated oxygen sensor reacts in accordance with increase and decrease of injection volume: 
6. +25 % --> rich output: More than 0.55 V 
7. -12.5 % --> lean output: Less than 0.4 V