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DTC P1701: Cruise Control Set Signal Circuit Malfunction (A/T)

  1. Perform basic diagnostic procedure. See BASIC DIAGNOSTIC PROCEDURE . Turn ignition off. Disconnect 24-pin transmission control module (TCM) electrical harness connector B54 and 20-pin cruise control module (CCM) electrical harness connector. Transmission control module is located under left side of instrument panel. Cruise control module is located under left side of instrument panel on Forester, Impreza and Outback Sport and under right side of instrument panel on Legacy and Outback. On Forester, use a DVOM to measure resistance of Green/Yellow wire between 24-pin TCM electrical harness connector B54 terminal No. 11 and 20-pin CCM electrical harness connector terminal No. 12. On Impreza and Outback Sport, use a DVOM to measure resistance of Green/Yellow wire between 24-pin TCM electrical harness connector B54 terminal No. 11 and 20-pin CCM electrical harness connector terminal No. 3. On Legacy and Outback, use a DVOM to measure resistance of Black/Orange wire between 24-pin TCM electrical harness connector B54 terminal No. 11 and 20-pin CCM electrical harness connector terminal No. 3. If resistance is less than one ohm, go to next step. If resistance is not less than one ohm, repair open circuit in wiring between TCM and CCM. See CRUISE CONTROL in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Clear memory and perform verification procedure. See CLEARING DIAGNOSTIC TROUBLE CODES  and VERIFICATION PROCEDURE  .
  2. Use a DVOM to measure resistance between 24-pin TCM electrical harness connector B54 terminal No. 11 (Green/Yellow wire on Forester, Impreza and Outback Sport; Black/Orange wire on Legacy and Outback) and good chassis ground point. If resistance is not less than 10 ohms, go to next step. If resistance is less than 10 ohms, repair short in wiring between cruise control module and TCM. See CRUISE CONTROL in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Clear memory and perform verification procedure. See CLEARING DIAGNOSTIC TROUBLE CODES  and VERIFICATION PROCEDURE  .
  3. With ignition off, reconnect 24-pin TCM electrical harness connector B54 and 20-pin CCM electrical harness connector. Raise and properly support vehicle on jackstands, or place vehicle on free rollers. Ensure wheels of all-wheel drive vehicles are off the ground. Start engine. Turn cruise control main switch on. Place gear shift lever in Drive and slowly increase vehicle speed to 31 MPH. Turn cruise control system on and use a DVOM to measure voltage by backprobing between 24-pin TCM electrical harness connector B54 terminal No. 11 (Green/Yellow wire on Forester, Impreza and Outback Sport; Black/Orange wire on Legacy and Outback) and good chassis ground point. If voltage is less than one volt, go to next step. If voltage is not less than one volt, check cruise control system. See appropriate CRUISE CONTROL article in ACCESSORIES AND EQUIPMENT. Clear memory and perform verification procedure. See CLEARING DIAGNOSTIC TROUBLE CODES  and VERIFICATION PROCEDURE  .
  4. Check for poor terminal contact in 24-pin TCM electrical harness connector B54. Repair as necessary. If terminal contact is okay, replace TCM. See appropriate DIAGNOSTICS article in AUTOMATIC TRANSMISSIONS in TRANSAXLE/TRANSMISSION. Clear memory and perform verification procedure. See CLEARING DIAGNOSTIC TROUBLE CODES  and VERIFICATION PROCEDURE  .
Fig 1: Identifying Terminals Of 20-Pin Cruise Control Connector
G00256582Courtesy of SUBARU OF AMERICA, INC.
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