DTC P1103: Engine Torque Control Signal No. 1 Circuit Malfunction (A/T) - Forester, IMPREZA & Outback Sport
- Perform basic diagnostic procedure. See BASIC DIAGNOSTIC PROCEDURE . Turn ignition on. Using DVOM connected to ground, backprobe ECM connector B135 (28-pin connector) terminal No. 16. See Figure. If voltage is more than 4.5 volts, go to next step. If voltage is not more than 4.5 volts, go to step 4.
- Using DVOM connected to ground, backprobe ECM connector B135 (28-pin connector) terminal No. 16. If voltage is more than 10 volts, locate and repair short to voltage in wiring between ECM and Transaxle Control Module (TCM). See WIRING DIAGRAMS article. If voltage is not more than 10 volts, go to next step.
- Check for poor terminal contact in ECM connector B135 (28-pin). Repair as required. If connection is okay, replace ECM.
- Turn ignition off. Disconnect ECM and TCM connectors. Using an ohmmeter, measure resistance between TCM connector B54 (24-pin connector) terminal No. 13 and ECM connector B135 (28-pin connector) terminal No. 16. See Figure and Fig 1
. If resistance is less than one ohm, go to next step. If resistance is not less than one ohm, locate and repair open circuit in wiring between ECM and TCM.
- Measure resistance between ECM connector B135 (28-pin connector) terminal No. 16 and ground. If resistance is less than 10 ohms, locate and repair short to ground in wiring between ECM and TCM. If resistance is not less than 10 ohms, go to next step.
- Check for poor contact in TCM connector. Repair as needed. If connector is okay, replace TCM. Clear memory and perform verification procedure. See CLEARING DIAGNOSTIC TROUBLE CODES and VERIFICATION PROCEDURE
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