Troubleshooting
NOTE: The numbers in the table show the troubleshooting sequence.
View from the back of the gauge assembly
NOTE: A short to ground in the ORN wire can be caused by a short in any component connected to it.
Vehicle Speed Sensor (VSS) Test
Speedometer does not work.
Inspect No. 5 (15 A) fuse in the
under-dash fuse box before
testing.
Disconnect the 3-P connector
from the VSS.
Turn the ignition switch ON (II).
Measure voltage between the YEL
wire terminal and the BLK wire
terminal in the harness side of the
3-P connector.
Is there battery voltage?
Measure voltage between the
ORN and the BLK wire terminals.
Is there about 5 V?
(To page 23-132)
View from
terminal side
, BLK 3-P CONNECTOR
VSS
Is there continuity?
Repair open in the ORN wire or
short to body ground.
Repair open between
the VSS and ground
G101.
Repair open in the YEL wire be-
tween the VSS and under-dash
fuse box.
Check for continuity between the
BLK terminal and body ground.
Speedometer/Trip Meter/Odometer
Troubleshooting
(From page 23-131)
Connect the Test Harness (07LAJ —
PT3020A) between the VSS and
the engine wire harness.
Raise the rear of the car, and sup-
port it with stands.
Back-probe the ORN wire, and
connect it to body ground through
a voltmeter.
Put the car in neutral with the
ignition switch ON (II).
Slowly rotate one wheel with the
other wheel blocked.
Does voltage pulse from 0 to
about 5 or more V?
Disconnect the 30-P connector at
the speedometer.
Back-probe the ORN wire, and
connect it to body ground through
a voltmeter.
Slowly rotate one wheel with the
other wheel blocked.
Does the voltmeter indicate
pulsing voltage?
WHT TEST HARNESS
CLIP
TEST HARNESS
07LAJ – PT3020A
RED TEST HARNESS
CLIP
PROTECTIVE
TAPE
VSS
GRN TEST HARNESS CLIP
Replace the VSS (see page
23-133).
Repair open in the ORN wire,
between the VSS and the
speedometer.
Replace the speedometer.