Workshop Manual

INTELLIGENT SUSPENSION
3F–23
DTC5 Vehicle Speed Sensor Open Circuit or Short
Circuit Description
Output speed information is provided to the control unit by
the vehicle speed sensor. The vehicle speed sensor
produces a pulsing AC voltage. The AC voltage level and
number of pulses increases as the speed of the vehicle
increases. The control unit then converts the pulsing
voltage to vehicle speed.
Diagnostic Aids
B Inspect the wiring for poor electrical connections
between the control unit 48 way connector and the
speed sensor connectors. Look for possible bent,
backed out, deformed, or damaged terminals. Check
for weak terminal tension as well.
Also check for a chafed wire that could short to bare
metal or other wiring. Inspect for a broken wire inside
the insulation.
B When diagnosing for a possible intermittent short or
open condition, move the wiring harness while
observing test equipment for a change.
DTC5 Vehicle Speed Sensor Open Circuit or Short
Step Action Value(s) Yes No
1 1. Jack up and support the rear axle on the stand.
2. Change the transfer mode to 2WD, using TOD
switch on instrument panel.
3. Shift the transmission lever in a forward position
and rotate the rear wheels.
Does the speedo-meter operate?
— Go to Step 2 Go to Step 3
2 1. Open the throttle and rev up engine speed.
2. Using a volt meter, measure the voltage between
the meter B connector I–23 terminals 7 and 16
(GND).
Does the voltage change alternately at the specified
values?
0V and 12V Go to Step 7 Go to Step 5
3 1. Turn off the starter switch and disconnect the
control connectors C–46 and C–44.
2. Check the continuity between the vehicle speed
sensor connector terminal 3 and meter B connector
I–23 terminal 7.
Is there continuity?
— Go to Step 4 Go to Step 6
4 1. Check the continuity between the control unit
connector C–46 terminal 1 and control unit
connector C–44 terminal 48.
Is there continuity?
— Go to Step 5 Go to Step 6
5 Repair or replace the vehicle speed sensor.
— Go to Step 8 —
6 Repair the circuit between the vehicle speed sensor
connector terminal 3 and the meter B connector I–23
terminal 7 or the circuit between the control unit
connector C–44 terminal 48 and the speed sensor
connector terminal 3.
— Go to Step 8 —