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AT-312 [EXC.F/EURO-OBD] TROUBLE DIAGNOSES FOR SYMPTOMS 1. O/D OFF Indicator Lamp Does Not Come On ECS009A7 SYMPTOM: 1. CHECK TCM POWER SOURCE 1. Turn ignition switch to “ON” position. 2. Check voltage between TCM terminals 10, 19, 28 and ground. 3. Turn ignition switch to “OFF” position. 4. Check voltage between TCM terminal 28 and ground. OK or NG OK >> GO TO 2 NG >> Check the following items: ● Harness for short or open between ignition switch and ● Refer to AT-344, "Wiring Diagram — AT — MAIN" . ● Ignition switch and fuse. Refer to EL-11, “Power Supply Routing”. 2. CHECK TCM GROUND CIRCUIT 1. Turn ignition switch to “OFF” position. 2. Disconnect TCM harness connector. 3. Check continuity between TCM terminals 25, 48 and ground. If OK, check harness for short to ground and short to power. OK or NG OK >> GO TO 3 NG >> Repair open circuit or short to ground or short to power in harness or connectors. Refer to . 3. CHECK LAMP CIRCUIT 1. Turn ignition switch to “OFF” position. 2. Check resistance between TCM terminals 13 and 10, 19. 3. Reinstall any part removed. OK or NG OK >> GO TO 4 NG >> Check the following items: ● O/D OFF indicator lamp. ● Harness and fuse for short or open between ignition ● Harness for short or open between O/D OFF indicator lamp and TCM. Voltage: Battery voltage Voltage: Battery voltage SCIA0713E Continuity should exist. SCIA0766E Resistance: 50 - 100 Ω SCIA0767E |