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TM-94 < COMPONENT DIAGNOSIS > MAIN POWER SUPPLY AND GROUND CIRCUIT MAIN POWER SUPPLY AND GROUND CIRCUIT Diagnosis Procedure INFOID:0000000005148678 1. CHECK TCM POWER SOURCE STEP 1 1. Turn ignition switch OFF. 2. Disconnect A/T assembly harness connector. 3. Check voltage between A/T assembly harness connector termi- nals and ground. OK or NG OK >> GO TO 2. NG >> GO TO 3. 2. CHECK TCM POWER SOURCE STEP 2 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 termi- nals and ground. 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 A/T assembly harness connector terminals 1, 2 • Harness for short or open between ignition switch and A/T assembly harness connector terminal 6 • 10A fuse [No. 3, 4, located in the fuse block (J/B)] and 10A fuse (No. 49, located in the IPDM E/R) • Ignition switch OK >> GO TO 4. NG >> Repair or replace damaged parts. 4. CHECK TCM GROUND CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect A/T assembly harness connector. 3. Check continuity between A/T assembly harness connector F9 terminals 5, 10 and ground. If OK, check harness for short to ground and short to power. OK or NG OK >> GO TO 5. NG >> Repair open circuit or short to ground or short to power in harness or connectors. Item Connector Terminal Voltage TCM F9 1 - Ground Battery voltage 2 - Ground 6 - Ground 0V SCIA2104E Item Connector Terminal Voltage TCM F9 1 - Ground Battery voltage 2 - Ground 6 - Ground SCIA2105E Continuity should exist. SCIA2106E |