Q07352 AT5605
D00084
Rotor
No. 2 Vehicle Speed Sensor
Rotor
No. 2 Vehicle Speed Sensor
AT8761
5 V/div.
0 V
2 msec./div.
DI
−
166
−
DIAGNOSTICS
AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
DTC
P1700
Speed Sensor No. 2 Circuit Malfunction
(No. 2 Vehicle Speed Sensor)
CIRCUIT DESCRIPTION
The No. 2 vehicle speed sensor detects the rotation speed of the transmission output shaft and sends sig-
nals to the ECM. The ECM determines the vehicle speed based on these signals.
An AC voltage is generated in the No. 2 vehicle speed sensor coil as the rotor mounted on the output shaft
rotates, and this voltage is sent to the ECM.
The gear shift point and lock
−
up timing are controlled by the ECM based on the signals from this vehicle
speed sensor and the throttle position sensor signal.
If the No. 2 vehicle speed sensor malfunctions, the ECM uses input signals from the No. 1 vehicle speed
sensor as a back
−
up signal.
DTC No.
DTC Detecting Condition
Trouble Area
P1700
All conditions below are detected 500 times or more continu-
ously (2 trip detection logic)
(a) No signal from No. 2 vehicle speed sensor is input to ECM
while 4 pulses of No. 1 vehicle speed sensor signal is sent
(b) Vehicle speed: 9 km/h (5.6 mph) or more for as least 4 sec.
(c) Park/neutral position switch: OFF (Other than P or N posi-
tion)
(d) Transfer position: Other than N position
S
Open or short in No. 2 vehicle speed sensor circuit
S
No. 2 vehicle speed sensor
S
ECM
Reference:
Waveform between terminals SP2
+
and SP2
−
when the vehicle
speed is approx. 60 km/h (37 mph).
DI5KW
−
02
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Brought to you by BirfMark
Version 1.00 - 12/21/2010
