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8. CHECK THE (T13) SENSOR GROUND CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (T13) Sensor Ground Is the resistance below 5.0 ohms? Yes >> Repair the (T13) Sensor Ground circuit for a short to ground. Perform NAG1 TRANSMISSION VERIFICATION TEST - No >> Go To 9 9. CHECK THE INPUT SPEED SENSOR 1 (N2) SIGNAL Reconnect the Electrohydraulic Control Unit Assembly harness connec- Using a Lab Scope, backprobe the (T70) Input Speed Sensor 1 (N2) WARNING: Properly support the vehicle. Start the engine. WARNING: To avoid personal injury or death, keep hands and feet Compare the scope pattern on the Lab Scope with a typical 5-volt Is the scope pattern comparable to the typical 5-volt square Yes >> Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/ No >> Replace the Input Speed Sensor 1 (N2) per the Service Information. (Refer to 21 - TRANSMISSION/ TRANSAXLE/AUTOMATIC - NAG1/ELECTROHYDRAULIC UNIT - DISASSEMBLY) Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/ 21 - 46 AUTOMATIC TRANSMISSION NAG1 - ELECTRICAL DIAGNOSTICS LX |