A/T Check Indicator Lamp Does Not Come On
A/T Check Indicator Lamp Does Not Come OnSYMPTOM: A/T CHECK indicator lamp does 1not come on for about 2 seconds when turning ignition switch to "ON".
DIAGNOSTIC PROCEDURE
1. CHECK CAN COMMUNICATION LINE
Execute the self-diagnosis.
Do the self-diagnosis results indicate CAN communication?
YES >> Check the CAN communication line. Refer to "DTC U1000 CAN COMMUNICATION LINE".
NO >> GO TO 2.
2. HECK TCM POWER SOURCE
1. Turn ignition switch ON. (Do not start engine.)
2. Check voltage between TCM connector terminals and ground. Refer to "Wiring Diagram-AT-POWER".
3. Turn ignition switch OFF.
4. Check voltage between TCM connector terminals and ground. Refer to "Wiring Diagram-AT-POWER".
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 terminal 9
^ Harness for short or open between ignition switch and TCM terminals 2, 3, 33 and 42
^ Harness for short or open between IPDM E/R terminal 33 and A/T PV IGN relay terminals 2
^ Harness for short or open between A/T PV IGN relay terminal 1 and ground.
^ 15A fuse (No.34, located in the fuse and fusible link block) and 1 OA fuse (No. 71, located in the IPDM E/R)
^ Ignition switch; Refer to "POWER SUPPLY ROUTING CIRCUIT". Power and Ground Distribution
^ A/T PV IGN relay; Refer to "P1701; Component Inspection".
^ ECM relay; Refer to "POWER SUPPLY CIRCUIT FOR ECM". Testing and Inspection
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 continuity between terminals 5 (B), 14 (B), 24 (B), 46 (B) and ground. Refer to "Wiring Diagram - AT POWER".
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 short-circuit(s) in the harness or connector to ground or the power source.
5. CHECK A/T CHECK INDICATOR LAMP CIRCUIT
1. Turn ignition switch OFF.
2. Check the combination meter. Refer to "COMBINATION METERS". Description and Operation
OK or NG
OK >> GO TO 6.
NG >> Replace the combination meter. Refer to "Removal and Installation for Combination Meter"
6. CHECK SYMPTOM
Check again.
OK or NG
OK >> INSPECTION END
NG >> GO TO 7.
7. PERFORM TCM INSPECTION
1. Perform TCM input/output signal inspection. Refer to "TCM Input/Output Signal Reference Values"
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.