A/T Check Indicator Lamp Does Not Come On

A/T CHECK Indicator Lamp does not come on

SYMPTOM: A/T CHECK indicator lamp does not come on for about 2 seconds when turning ignition switch to "ON".

DIAGNOSTIC PROCEDURE
1. CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis.

Is a malfunction in the CAN communication indicated in the results?
Yes or No
Yes >> Check CAN communication line. Refer to "DTC U1000 CAN COMMUNICATION LINE". Transmission Control Systems
No >> GO TO 2.

2. CHECK TCM POWER SOURCE
1. Disconnect A/T assembly harness connector.
2. Turn ignition switch "ON". (Do not start engine.)








3. Check voltage between A/T assembly harness connector (vehicle side) and ground. Refer to "Wiring Diagram-AT-"
4. Turn ignition switch "OFF".








5. Check voltage between A/T assembly harness connector (vehicle side) and ground. Refer to "Wiring Diagram-AT-".

OK or NG
OK >> GO TO 4.
NG >> GO TO 3.

3. DETECT MALFUNCTIONING ITEM
Check the following items:
^ Harness for short or open between battery and TCM connector terminals 1, 2
^ Harness for short or open between ignition switch and TCM connector terminal 6
^ 10A fuse (No. 37, located in the fuse and fusible link box)
^ 10A fuse (No. 83, located in the IPDM E/R)
^ Ignition switch, Refer to "POWER SUPPLY ROUTING CIRCUIT". Power Supply Routing Circuit Schematic

OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.

4. CHECK TCM GROUND CIRCUIT
1. Turn ignition switch "OFF".
2. Disconnect the TCM connector.





3. Check the continuity between A/T assembly harness connector (vehicle side) 5 (B), 10 (B) and ground. Refer to "Wiring Diagram-AT-".
4. If OK, check the harness for short-circuit to ground or the power source.

OK or NG
OK >> GO TO 5.
NG >> Repair the open or short circuit in the harness or connector.

5. CHECK A/T CHECK INDICATOR LAMP CIRCUIT
1. Turn ignition switch "OFF".
2. Check the combination meter. Combination Meters

OK or NG
OK >> INSPECTION END
NG >> Replace the combination meter. Combination Meter