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Transmission Control System (Smoother) 7A-79 11 1. Test the signal circuit between the TCM (pin 4 of B-427 connector) and the turbine speed • An open circuit 2. Repair the circuit(s) as necessary. Did you find and correct the condition? — Go to Step 18 Go to Step 14 12 1. Test the low reference circuit between the TCM (pin 10 of B-427 connector) and the 2. Repair the circuit(s) as necessary. Did you find and correct the condition? — Go to Step 18 Go to Step 14 13 1. Turn OFF the ignition. connections at the harness connector of the 3. Repair the connection(s) as necessary. Did you find and correct the condition? — Go to Step 18 Go to Step 15 14 1. Turn OFF the ignition. connections on the turbine speed sensor 4. Repair the connection(s) as necessary. Did you find and correct the condition? — Go to Step 18 Go to Step 17 15 1. Remove the turbine speed sensor. Refer to Turbine Speed Sensor Replacement in this 2. Visually inspect the turbine speed sensor for the following conditions: • Physical damage 3. The following conditions may cause this DTC to set: • Excessive air gap between the turbine speed sensor and the gearshift multi-plate • Electromagnetic interference in the turbine speed sensor circuits • Foreign material passing between the turbine speed sensor and the gearshift Did you find and correct the condition? — Go to Step 18 Go to Step 16 16 Replace the turbine speed sensor. Refer to Turbine Did you complete the replacement? — Go to Step 18 — Step Action Value(s) Yes No |