Celica ST Ltd Ed Liftback L4-1762cc 1.8L DOHC MFI (1997)
Camshaft Position Sensor: Component Tests and General Diagnostics
CAMSHAFT POSITION SENSOR (SIGNAL GENERATOR) INSPECTION
NOTICE: "Cold" and "Hot" in the following sentences express the temperature of the coils themselves. Cold is from - 10°C (140°F) to 50°C (122°F)
and Hot is from 50°C (122°F) to 100°C (212°F).
1. DISCONNECT DISTRIBUTOR CONNECTOR
2. REMOVE DISTRIBUTOR CAP AND ROTOR
3. REMOVE IGNITION COIL DUST COVER
4. INSPECT AIR GAP
Using a feeler gauge, measure the air gap between the signal rotor and pickup coil projection.
Air gap: 0.2 - 0.4 mm (0.008 - 0.016 in.)
If the air gap is not as specified, replace the distributor housing assembly.
5. INSPECT SIGNAL GENERATOR (PICKUP COIL) RESISTANCE
Using an ohmmeter, measure the resistance between terminals G(+) and G(-).
Pickup coil resistance:
Cold 185 - 275 Ohms
Hot 240 - 325 Ohms
If the resistance is not as specified, replace the distributor housing assembly.
6. REINSTALL IGNITION COIL DUST COVER
7. REINSTALL DISTRIBUTOR CAP AND ROTOR
8. RECONNECT DISTRIBUTOR CONNECTOR
