Diagnosis Procedure

OVERDRIVE CONTROL SWITCH


Diagnosis Procedure

1.CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to CONSULT-III Function (Transmission).
Is any malfunction in the CAN communication indicated in the results?
YES - Check CAN communication line. Refer to A/T Control System.
NO - GO TO 2.
2.CHECK OVERDRIVE CONTROL SWITCH CIRCUIT
With CONSULT-III
1. Turn ignition switch "ON".
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Read out "OD CONT SW".
Check the signal of the overdrive control switch is indicated properly.





Without CONSULT-III
1. Turn ignition switch "ON". (Do not start engine)
2. Check voltage between A/T control device connector terminal and ground.





OK or NG
OK - GO TO 5.
NG - GO TO 3.
3.CHECK OVERDRIVE CONTROL SWITCH
1. Turn ignition switch "OFF".
2. Disconnect A/T control device connector.
3. Check continuity between A/T control device connector M156 terminals 7 and 8.





OK or NG
OK - GO TO 4.
NG - Repair or replace overdrive control switch.
4.DETECT MALFUNCTIONING ITEM
Check the following. If any items are damaged, repair or replace damaged parts.
- Harness for short or open between combination meter connector terminal 20 and A/T control device connector terminal 7.
- Harness for short or open between A/T control device connector terminal 8 and ground.
OK or NG
OK - GO TO 5.
NG - Repair or replace damaged parts.
5.CHECK COMBINATION METER
Check the combination meter. Refer to Diagnosis Description.
OK or NG
OK - INSPECTION END
NO - Repair or replace damaged parts.