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DIAGNOSTICS
ENGINE
DI
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93
1996 LAND CRUISER (RM451U)
DTC
P0510
Closed Throttle Position Switch Malfunction
CIRCUIT DESCRIPTION
Refer to DTC P0120 (Throttle/Pedal Position Sensor/Switch ”A” Circuit Malfunction) on page
DI
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35
.
DTC No.
DTC Detecting Condition
Trouble Area
P0510
The closed throttle position switch does not turn ON or OFF
even once when the vehicle is driven
(2 trip detection logic)
S
Open or short in closed throttle position switch circuit
S
Closed throttle position switch
S
ECM
HINT:
After confirming DTC P0510 use the TOYOTA hand
−
held tester to confirm the closed throttle position switch
signal from ”CURRENT DATA”.
Throttle Valve
Closed Throttle Position Switch Signal
Malfunction
Fully closed
OFF
Open circuit
Fully open
ON
Short circuit
WIRING DIAGRAM
Refer to DTC P0120 (Throttle/Pedal Position Sensor/Switch ”A” Circuit Malfunction) on page
DI
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35
for WIR-
ING DIAGRAM.
INSPECTION PROCEDURE
HINT:
If DTCs P0110 (Intake Air Temp. Circuit Malfunction), P0115 (Engine Coolant Temp. Circuit Malfunction),
P0120 (Throttle/Pedal Position Sensor/Switch ”A” Circuit Malfunction) are output simultaneously, E2 (Sen-
sor Ground) may be open.
TOYOTA hand
−
held tester
1
Connect the TOYOTA hand
−
held tester and read CTP switch signal.
PREPARATION:
(a)
Remove the fuse cover on the instrument panel.
(b)
Connect OBD II scan tool or TOYOTA hand
−
held tester to the DLC3.
(c)
Turn ignition switch ON and OBD II scan tool or TOYOTA hand
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held tester main switch ON.
CHECK:
Read CTP switch signal on TOYOTA hand
−
held tester.
RESULT:
Throttle Valve
Closed Throttle Position Switch Signal
Malfunction
Fully closed
OFF
Open circuit: Go to step 2
Fully open
ON
Short circuit: Go to step 4
DI5PP
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02
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Version 1.00 - 12/21/2010