P24663
2
(
−
)
3
4
1
(+)
−
DIAGNOSTICS
ENGINE
DI
−
65
1996 LAND CRUISER (RM451U)
DTC
P0340
Camshaft Position Sensor Circuit
Malfunction
CIRCUIT DESCRIPTION
The camshaft position sensors (G1 and G2 signals) consist of a signal plate and a pick up coil. The G1, G2,
signal plates each have one tooth on the outer circumference and are built into the distributor. When the
camshaft rotates, the protrusion on the signal plate and the air gap on the pick up coil change, causing fluc-
tuations in the magnetic field and generating an electromotive force in the pick up coil. The ECM detects the
standard crankshaft angle based on the G1, G2 signals, detects the actual crankshaft angle and engine
speed by the NE signals, and detects misfire by NE2 signals.
DTC No.
DTC Detecting Condition
Trouble Area
P0340
No camshaft position sensor signal (G signal) to ECM with
engine speed 550 rpm or more.
S
Open or short in camshaft position sensor circuit
S
Camshaft position sensor
S
ECM
WIRING DIAGRAM
Refer to DTC P0335 (Crankshaft Position Sensor ”A” Circuit Malfunction) on page
DI
−
62
for the WIRING
DIAGRAM.
INSPECTION PROCEDURE
1
Check resistance of camshaft position sensor.
PREPARATION:
Disconnect camshaft position sensor connector.
CHECK:
Measure resistance between terminals 2, 3 and 4 of distributor
connector.
OK:
Resistance
Cold
185
−
275
Ω
Hot
240
−
325
Ω
”Cold” is from
−
10
°
C (14
°F) to 50°C (122°F) of engine coolant
temperature and "Hot" is from 50°C (122°F) to 100°C (212°F).
Reference: INSPECTION USING OSCILLOSCOPE
Refer to page
DI
−
62
for Reference INSPECTION USING OS-
CILLOSCOPE.
NG
Replace distributor housing assembly.
OK
DI5PI
−
02
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