Specifications

AUTOMATIC TRANSMISSION -
Troubleshooting
23-37
INSPECTION PROCEDURE 18
Idle position switch system
Probable cause
The cause is probably a defective idle position switch circuit or a defective A/T-ECU. D Malfunction of the idle position switch
D Malfunction of connector
D Malfunction of the A/T-ECU
Idle position switch check
(Refer to GROUP 13A - On-vehicle Service.)
NG
Replace t h e throttle position sensor.
OK
Check the following connectors:
B-07 <Vehicles without TCL>, B-41 <Vehicles with TCL>, C-29
NG
Repair
OK
Harness check
D Between idle position switch and A/T-ECU
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the A/T-ECU.
INSPECTION PROCEDURE 19
Dual pressure switch system
Probable cause
The cause is probably a defective dual pressure switch circuit or a defective A/T-ECU. D Malfunction of the dual pressure switch
D Malfunction of connector
D Malfunction of A/C system
D Malfunction of the A/T-ECU
Dual pressure switch check (Refer to
GROUP 55 - On-vehicle service.)
NG
Replace
OK
Check the voltage of the A/T-ECU con-
nector C-28.
D Disconnect the connector and
check at the harness side.
D Ignition switch: ON
D A/C switch: ON
D Voltage between terminal No. 10
and earth
OK:
Battery voltage
OK
Check the following connectors:
B-30, C-28
NG
Repair
OK
Check the trouble symptoms.
NG
NG
Check the A/C system. (Refer to
GROUP 55 - Troubleshooting.)
Repair
OK
Replace the A/T-ECU.
NG
A/C system check (Refer to GROUP
55 - T roubleshooting.)