Detecting Condition

DETECTING CONDITION
If the Engine Control Module (ECM) detects the above diagnosis conditions, it operates the fail safe function in which the corrective retard angle value is set to the maximum value.

DIAGNOSTIC TROUBLE CODE DETECTION DRIVING PATTERN




Open or Short in Knock Sensor
Purpose of the driving pattern:
- To simulate diagnostic trouble code detecting condition after diagnostic trouble code is recorded.
- To check that the malfunction is corrected when the repair is completed by confirming that diagnostic trouble code is no longer detected.

1. Start the engine and warm it up.
2. Let the engine idle for 3 min.
3. With the A/C ON, quickly race the engine to 5,000 rpm 3 times. (Rapidly depress the accelerator pedal and suddenly release it.)

HINT: If a malfunction exists, the malfunction indicator lamp will light up when the engine quickly raced.

NOTICE: If the conditions in this test are not strictly followed, detection of the malfunction will not be possible.