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DIAGNOSIS 7A2-156
TCM VOLTAGE CHECK
TCM voltage check is done to check for transmission and TCM problems which cannot be detected by self-diagnosis. Additionally, it severs as a back-up check for self-diagnosis. Measure the voltage drop and make a continuity test for each of If the voltage is within the specified range and continuity exists, If voltage deviation or lack of continuity is discovered, disconnect
Inspection Tool Use a circuit tester and an oscilloscope to measure voltage and Insert the test probes from the connector wiring side. TCM Wrap a piece of thin wire around the probe of tester. This will make measurement easier.
TCM Pin Assignment
Connect to White Connector Connect to Grey Connector
No. Wire Color Pin Name Input / Output Connected to Measurement Item Measurement Condition Standard Inspection Point at A1 RED V BATT (Battery Back-up Power Supply) Input Battery Voltage - Battery voltage Related harness At P range Battery voltage Related harness A2 YEL/ VIO P Range Switch Input Inhibitor switch Voltage At other than P range Less than 2V Inhibitor switch At brake stepped Battery voltage Related harness A3 RED Brake Switch Input Brake switch Voltage At brake no stepped Less than 2V Brake switch At lamp OFF Battery voltage Related harness A4 PNK/ WHT 3rd Start Indicator Lamp Output 3rd start lamp Voltage At lamp ON Less than 2V Lamp A5 GRN K-line signal (Tech 2 serial communication) Input/ Output Tech 2 - - - Related harness A6 - - - - - - - - |