| CAUTION | Some tachometers may not be compatible with ignition system. Consult tachometer manufacturer before connecting tachometer to system. DO NOT allow tachometer terminal to become grounded to avoid possible damage to ignitor and/or coil. |
- Ensure engine is at normal operating temperature. Connect timing light to engine. Connect tachometer to proper location. (Scheme 4)through (Scheme 8).
- Install jumper wire between proper terminals of engine check connector. (Scheme 9)through (Scheme 12). Ensure idle speed is within specification. See «IDLE SPEED SPECIFICATIONS»(ref-20887-S31863415792001010300000) table. Ensure base timing is within specification. See «4-CYLINDER IGNITION TIMING»(ref-20887-S17789886912001010300000) (Degrees BTDC @ RPM) table. Adjust timing by turning distributor.
- Remove jumper wire from engine check connector and ensure advance timing is within specification. See «4-CYLINDER IGNITION TIMING»(ref-20887-S17789886912001010300000) (Degrees BTDC @ RPM) table.
| Application/ Model | Base Timing Degrees @ RPM | Advance Timing Degrees @ Idle |
|---|
| Camry (3S-FE Engine) | 10 @ 650 | 13-22 |
| Celica |
| 3S-GTE Engine | 10 @ 800 | 12-21 |
| 4A-FE Engine | 10 @ 800 | 5-15 |
| 5S-FE Engine | 10 @ 700 | 13-22 |
| Corolla |
| 4A-FE Engine | 10 @ 800 (1) | 5-15 |
| 4A-GE Engine | 10 @ 800 | Approx. 16 |
| Pickup & 4Runner | 5 @ 750 (2) | 10-14 |
| Tercel (3E-E Engine) | 10 @ 800 | 7-17 |
| (1) 700 RPM on 4WD models. (2) 850 RPM on Pickup 4WD models with A/T. |
| (1) | 700 RPM on 4WD models. |
| (2) | 850 RPM on Pickup 4WD models with A/T. |
4-CYLINDER IGNITION TIMING (Degrees BTDC @ RPM)
Scheme 4
Scheme 5
Scheme 6
Scheme 7
Scheme 8
Scheme 9
Scheme 10
Scheme 11
Scheme 12
