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• When Monitored: • Set Condition: Possible Causes (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT OPEN (T13) SPEED SENSOR GROUND CIRCUIT OPEN (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO GROUND (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE (T13) SPEED SENSOR GROUND CIRCUIT SHORT TO VOLTAGE INPUT SPEED SENSOR POWERTRAIN CONTROL MODULE Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS- Theory of Operation The transmission control system uses two speed sensors, one to measure input RPM and one to measure output Diagnostic Test 1. CHECK TO SEE IF DTC P0715 IS CURRENT Start the engine. Place the shifter in park. With the scan tool , read the Input Speed Sensor RPM. Is the Input Speed Sensor reading below 400 RPM? Yes >> Go To 2 No >> Go To 8 2. CHECK THE PCM AND WIRING WITH THE TRANSMISSION SIMULATOR Turn the ignition off to the lock position. Remove the Starter Relay. CAUTION: Removal of the Starter Relay will prevent the vehicle from being started in gear. WARNING: The Starter Relay must be removed from the PDC. Failure to do so can result in personal injury NOTE: Failure to remove the Starter Relay can cause a Transmission - No Response condition. Ignition on, engine not running. With the Transmission Simulator, set the 9 Input/Output Speed 9 switch to 9 ON 9 and the rotary switch to the 9 3000/ 1250 9 position. With the scan tool, read the Input and Output RPM. Does the Input speed read 3000 RPM and the Output speed read 1250 RPM ± 50 RPM? Yes >> Replace the Input Speed Sensor per the Service Information. Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/ No >> Go To 3 21 - 92 AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS KJ |