Specifications

AUTOMATIC TRANSMISSION -
Troubleshooting
23-38
INSPECTION PROCEDURE 20
Vehicle speed sensor system
Probable cause
The cause is probably a defective vehicle speed sensor circuit or a defective A/T-ECU. D Malfunction of the vehicle speed sensor
D Malfunction of connector
D Malfunction of the A/T-ECU
2. NG
3. NG
OK
Check the ignition switch. (Refer to GROUP 54 - Ignition switch.)
NG
OK
OK
Replace the engine-ECU.
OK
Replace the engine-ECU.
Check the harness wire between the vehicle speed sensor and
the earth, and repair if necessary.
NG
Check the harness wire
between the engine-ECU
and the vehicle speed
sensor connector.
NG
Repair
Check trouble symptom.
Check the following
connectors:
C-30, C-48
NG
Repair
NG
Check the harness wire
between the vehicle
speed sensor and ignition
switch connector.
NG
Repair
OK
Check trouble symptom.
Check the harness wire
between the engine-ECU
and the vehicle speed
sensor connector.
NG
Repair
OK
Check trouble symptom.
OK
Check the following
connector:
B-67
NG
Repair
OK
Measure at the vehicle speed sensor connector B-67.
D Disconnect the connector, and measure at the harness side.
1. Voltage between 1 and earth (Ignition switch: ON)
OK:
Battery voltage
2. Voltage between 3 and earth (Ignition switch: ON)
OK:
4.8 - 5.2 V
3. Continuity between 2 and earth
OK:
Continuity
1. NG
Check the following
connectors:
C-90, C-131, C-135
NG
Repair
Check t he vehicle speed sensor.
(Refer to GROUP 54 - Combination Meters.)
NG
Replace
INSPECTION PROCEDURE 21
Auto-cruise-ECU signal system
Probable cause
The cause is probably a defective auto-cruise signal line circuit or a defective A/T-ECU. D Malfunction of connector
D Malfunction of the A/T-ECU
D Malfunction of the auto-cruise-ECU
Auto-cruise system check (Refer to GROUP 17 - Troubleshooting.)
NG
Repair
OK
Check the following connectors:
C-28, C-82, C-83
NG
Repair
OK
Harness check
D Between auto-cruise-ECU and A/T-ECU
OK
Replace the A/T-ECU.
NG
Repair