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Home >> Toyota >> 2004 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 162 (Cruise Control Systems) >> Diagnostic Tests >> DTC 11: Short In Cruise Control Actuator Circuit Or DTC 15: Open In Cruise Control Actuator Circuit >> Diagnostic Procedure
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Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Ensure cruise control actuator control plate is NOT in fully opened (clockwise) position or fully closed (counterclockwise) position before disconnecting cruise control actuator connector. Disconnect Black 4-pin cruise control actuator electrical harness connector. See Figure.
  2. Measure resistance between cruise control actuator terminals No. 1 and 2. See Figure. If resistance is greater than 4.2 ohms, go to next step. If resistance is not greater than 4.2 ohms, replace cruise control actuator. See CRUISE CONTROL ACTUATOR  under REMOVAL & INSTALLATION. After repairs, perform confirmation test. See CONFIRMATION TEST .
  3. Turn ignition off. With cruise control actuator Black 4-pin electrical harness connector disconnected, disconnect cruise control ECU 16-pin electrical harness connector. Using a DVOM, check for open and short circuit conditions in Pink wire between cruise control ECU 16-pin electrical harness connector terminal No. 15 and cruise control actuator Black 4-pin electrical harness connector terminal No. 1. See Figure. Also, check Red wire between cruise control ECU 16-pin electrical harness connector terminal No. 7 and cruise control actuator Black 4-pin electrical harness connector terminal No. 2. If wires, harnesses and connectors are okay, go to next step. If wires, harnesses and connectors are not okay, repair fault as required. See CRUISE CONTROL in SYSTEM WIRING DIAGRAMS article. After repairs, perform confirmation test. See CONFIRMATION TEST .
  4. Turn ignition off. Reconnect cruise control actuator Black 4-pin electrical harness connector. Leave cruise control ECU 16-pin electrical harness connector disconnected. Using DVOM, check cruise control ECU ground circuit. See CRUISE CONTROL in SYSTEM WIRING DIAGRAMS article. If ground circuit is faulty, repair and retest system. If ground circuit is okay, substitute original cruise control ECU with a known-good unit and recheck system operation. If system operates properly, original cruise control ECU was defective. If system still does not operate properly, perform cruise control ECU pin voltage check. See PIN VOLTAGE TESTS . Check wiring harness and electrical connectors for an intermittent problem. Repair wiring harnesses or connectors as necessary. See CRUISE CONTROL in SYSTEM WIRING DIAGRAMS article. If voltage values, harnesses and connectors are okay, replace cruise control ECU. See CRUISE CONTROL ELECTRONIC CONTROL UNIT  under REMOVAL & INSTALLATION. After repairs, perform confirmation test. See CONFIRMATION TEST .
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