Diesel Data: Automotive Repair

Ignition Timing: Testing and Inspection

INSPECT IGNITION TIMING
a. Warm up engine.
b. When using hand-held tester or OBDII scan tool.
1. Connect the hand-held tester or OBDII scan tool to the DLC3.

HINT: Please refer to the hand-held tester or OBDII scan tool operator's manual for further details.

c. When not using hand-held tester or OBDII scan tool.







1 Using SST connect terminals 13 (TC) and 4 (CG) of DLC3.
SST 09843-18040

NOTICE: Be sure not to connect incorrectly. It causes breakage of the engine.
Turn OFF all electrical systems.
Operate the inspection when the cooling fan motor is turned OFF.







2. Remove the 3 bolts, the nut and the cylinder head cover No. 2.
3. Pull out the wire harness as shown in the illustration.
4. Connect timing light to engine.

NOTICE: Use a timing light which can detect the first signal.
After checking, be sure to tape the wire harness.

5 Inspect ignition timing at idle.

Ignition timing:..........................8 - 12° BTDC

NOTICE:
When checking the ignition timing, the transmission is at neutral position.

HINT: After engine rpm is kept at 1,000 - 1,300 rpm for 5 seconds, check that it returns idle speed.

6. Disconnect the terminal 13 (TC) and 4 (CG) of the DLC3.
7. Inspect ignition timing at idle.


Ignition timing:
M/T..................................4 - 12° BTDC
A/T ................................10 - 18° BTDC

8. Confirm that ignition timing moves to advanced angle side when the engine rpm is increased.
9. Remove the timing light.
10. Install cylinder head cover No. 2 with the 3 bolts and the nut.

Torque:............................7.0 Nm (71 kgf-cm, 62 inch lbs.)