Ignition Timing: Testing and Inspection
CHECK IGNITION TIMINGNOTICE:
- Turn all the electrical systems and the A/C OFF.
- Inspect the ignition timing with the cooling fan OFF.
- When checking the ignition timing, shift the transmission to the neutral position.
a. Warm up and stop the engine.
b. When using the handheld tester or OBD II scan tool:
1. Connect the handheld tester or OBD II scan tool to the DLC-3.
2. Turn the ignition switch to ON.
3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / IGN ADVANCE.
HINT: Refer to the handheld tester operator's manual for further information regarding the selection of Data List.
4. Inspect the ignition timing during idling.
Ignition timing: 5 to 15° BTDC
5. Check that the ignition timing advances immediately when the engine speed is increased.
6. Turn the ignition switch to OFF.
7. Disconnect the handheld tester or OBD II scan tool from the DLC-3.
c. When not using the handheld tester or OBD II scan tool:
1. Remove the engine cover No. 1.
2. Pull out the wire harness as shown in the illustration.
3. Connect the clip of the timing light to the engine.
NOTICE:
- Use a timing light that detects the first signal.
- After checking, be sure to wrap the wire harness with tape.
4. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC-3.
SST 09843-18040
NOTICE: Make sure of the terminal numbers before connecting them. Connecting the wrong terminals can damage the engine.
5. Turn the ignition switch to ON.
6. Inspect the ignition timing during idling.
Ignition timing: 8 to 12° BTDC
HINT: Run the engine speed at 1,000 to 1,300 rpm for 5 seconds, then check that the engine speed returns to the idling speed.
7. Disconnect terminals 13 (TC) and 4 (CG) of the DLC-3.
8. Inspect the ignition timing during idling.
Ignition timing: 5 to 15° BTDC
9. Check that the ignition timing advances immediately when the engine speed is increased.
10. Turn the ignition switch to OFF.
11. Remove the timing light.
12. Reinstall the engine cover No. 1.