P22487
No.1 Vehicle
Speed Sensor
Combination
Meter
ECM
4
−
pulse
4
−
pulse
P22473
Combination Meter
3
C13
L
−
W
L
−
W
8
E7
SPD
ECM
5V
E1
From Cruise Control ECU
−
DIAGNOSTICS
ENGINE
DI
−
87
1996 LAND CRUISER (RM451U)
DTC
P0500
Vehicle Speed Sensor Malfunction
CIRCUIT DESCRIPTION
The vehicle speed sensor outputs a 4
−
pulse signal for every revolution of the rotor shaft, which is rotated
by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectan-
gular wavefrom by the waveform shaping circuit inside the combination meter, it is then transmitted to the
ECM. The ECM determines the vehicle speed based on the frequency of these pulse signals.
DTC No.
DTC Detecting Condition
Trouble Area
P0500
No vehicle speed sensor signal to ECM under conditions (a)
and (b):
(2 trip detection logic)
(a) Park/neutral position switch is OFF.
(b) Vehicle is being driven.
S
Open or short in No.1 vehicle speed sensor circuit
S
No.1 vehicle speed sensor
S
Combination meter
S
ECM
WIRING DIAGRAM
DI5PN
−
02
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Brought to you by BirfMark
Version 1.00 - 12/21/2010