Diesel Data: Automotive Repair

Ignition Timing: Testing and Inspection

7. INSPECT IGNITION TIMING
a. Set the vehicle to inspection mode.
b. Warm up the engine.





c. Connect the hand-held tester to the DLC3.
d. Turn the power switch ON (IG).
e. Select the item: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / IGN ADVANCE
Ignition timing: 8 to 12°CA BTDC (at idle)

NOTICE:
^ Turn all the electrical systems OFF.
^ Inspect the engine idle speed with the cooling fan OFF.

HINT: Refer to the hand-held tester operator's manual if you need help to select DATA LIST.

f. Check that the ignition timing advances immediately when the engine speed is increased.