Camshaft Position Sensor Circuit Malfunction - Toyota T100 1996 Service Manual

DI−70
DTC P0340
CIRCUIT DESCRIPTION
Camshaft position sensor (G signal) consist of signal plate and pickup coil. The G signal plate has one tooth
on its outer circumference and is built into the distributor.
When the camshafts rotate, the protrusion on the signal plate and the air gap on the pickup coil change,
causing fluctuations in the magnetic field and generating an electromotive force in the pickup coil.
The NE signal plate has 34 teeth and is mounted on the crankshaft. The NE signal sensor generates 34
signals for every engine revolution. The ECM detects the standard crankshaft angle based on the G signals
and the actual crankshaft angle and the engine speed by the NE signals.
DTC No.
No camshaft position sensor signal to ECM during cranking
(2 trip detection logic)
P0340
No camshaft position sensor signal to ECM during engine run-
ning
WIRING DIAGRAM
Refer to DTC P0335 on page DI−66.
INSPECTION PROCEDURE
1 Check resistance of camshaft position sensor (See page EM−3).
Reference: INSPECTION USING OSCILLOSCOPE
Refer to DTC P0335 on page DI−66.
OK
2 Check for open and short in harness and connector between ECM and
distributor (See page IN−26).
OK
1996 TOYOTA T100 (RM449U)
DIAGNOSTICS
Camshaft Position Sensor Circuit
Malfunction
DTC Detecting Condition
NG
NG
− ENGINE (3RZ−FE)
S Open or short in camshaft position sensor circuit
S Camshaft position sensor
S Distributor
S Starter
S ECM
Replace distributor housing.
Repair or replace harness or connector.
Trouble Area
DI0TT−03