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Active Torque Control 4WD System (Diagnostic Codes & Circuit Tests): Other Toyota RAV4 IV

Transfer Case ~892 words

PROCEDURE

  1. CHECK FOR DTC Clear the DTC.Refer to «DTC CHECK / CLEAR»(ref-493513-S00841236752012081000000) . Turn the ignition switch off. Turn the ignition switch ON and check that can communication system DTC is not output. Result Result Proceed to CAN communication system DTC is output A Engine control DTC is output B B --> GO TO ENGINE CONTROL SYSTEM A --> GO TO CAN COMMUNICATION SYSTEM
  1. CHECK FOR DTC Clear the DTC.Refer to «DTC CHECK / CLEAR»(ref-493513-S00841236752012081000000) . Turn the ignition switch off. Turn the ignition switch ON again and check that CAN communication system DTC(s) is not output. Drive the vehicle, accelerate to a speed of 20 km/h (12 mph) or more, and check if the speed sensor DTC (brake control system DTC) is output.Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-493517-S10528308722012081000000) . Result Result Proceed to Neither CAN communication system DTC nor brake control system DTC is output A CAN communication system DTC is output B Brake control system DTC (speed sensor DTC) is output C HINT: When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor. B --> REPAIR CIRCUIT INDICATOR BY OUTPUT CODE (CAN COMMUNICATION SYSTEM) C --> REPAIR CIRCUIT INDICATOR BY OUTPUT CODE (BRAKE CONTROL SYSTEM) A: Go to next step
  2. CHECK OPERATION OF 4WD CONTROL ECU Replace the 4WD control ECU with a normally functioning or new one. NOTE: When performing inspections after replacing the 4WD control ECU with a normal one from another vehicle, be sure to perform zero point calibration of the yaw rate sensor by connecting terminals TS and CG of the DLC3.Refer to «CALIBRATION»(ref-493513-S28548267842012081000000) . HINT: Calibrate the 4WD control ECU by performing calibration of the vehicle stability control system. Reconfirm DTC. OK DTC is output. OK --> REPLACE 4WD CONTROL ECU NG --> GO TO BRAKE CONTROL SYSTEM (ANTI-LOCK BRAKE SYSTEM OR VEHICLE STABILITY CONTROL SYSTEM)
  1. CHECK TIRE CONDITION Check the size and condition of all 4 tires.Refer to «INSPECTION»(ref-493431-S04658987602012081000000) . HINT: This DTC is output when tire deformation or a difference in tire size is detected. OK The diameter and air pressure of all 4 tires are the same. NG --> REPLACE TIRE SO THAT ALL 4 TIRES ARE THE SAME IN SIZE OK: Go to next step
  2. RECONFIRM DTC Clear the DTC.Refer to «DTC CHECK / CLEAR»(ref-493513-S00841236752012081000000) . Start the engine. Drive the vehicle at the speed of 20 km/h (12 mph) or more and check that same DTC is output. Result Result Proceed to DTC is output A DTC is not output B B --> REPLACE ELECTROMAGNETIC COUPLING A --> REPLACE 4WD CONTROL ECU
  1. CHECK FOR DTC Check for DTC.Refer to «DTC CHECK / CLEAR»(ref-493513-S00841236752012081000000) . Record the output DTC (4WD control system). HINT: When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor. NEXT --> GO TO CAN COMMUNICATION SYSTEM
  1. CHECK FOR DTC Check the output DTC.Refer to «DTC CHECK / CLEAR»(ref-493513-S00841236752012081000000) . Result Result Proceed to Neither CAN communication system DTC nor 4WD control system DTC is output A CAN communication DTC is output B 4WD control system DTC is output C HINT: When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor. B --> REPAIR CIRCUIT INDICATOR BY OUTPUT CODE (CAN COMMUNICATION SYSTEM) C --> REPAIR CIRCUIT INDICATOR BY OUTPUT CODE (4WD CONTROL SYSTEM) A: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM (4WD INDICATOR LIGHT) Using the Techstream Active Test, generate a control command, and then check that the 4WD indicator light operates. COMBINATION METER Tester Display Test Part Control Range Diagnostic Note 4WD Warning Indicator 4WD indicator light Indicator light is ON / OFF Observer combination meter OK The 4WD indicator light turns OFF OK --> REPLACE 4WD CONTROL ECU NG: Go to next step
  3. CHECK WIRE HARNESS (4WD CONTROL ECU - BATTERY) Disconnect the E57 ECU connector. Measure the voltage of the wire harness side connector. Voltage Tester Connection Condition Specified Condition E57-11 (IG1) - Body Ground Ignition switch ON 10 to 14 V NG --> REPAIR OR REPLACE HARNESS AND CONNECTOR OK: Go to next step
  4. CHECK COMBINATION METER Check the combination meter system. Result The combination meter system is normal. NG --> REPLACE COMBINATION METER OK --> REPLACE 4WD CONTROL ECU
  1. CHECK CAN COMMUNICATION SYSTEM Check if the CAN communication system DTC is output. Result Result Proceed to DTC is not output A DTC is output B HINT: When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor. B --> REPAIR CAN COMMUNICATION SYSTEM A: Go to next step
  2. PERFORM ACTIVE TEST USING TECHSTREAM (4WD INDICATOR LIGHT) Using the Techstream Active Test, generate a control command, and then check that the 4WD indicator light operates. COMBINATION METER Tester Display Test Part Control Range Diagnostic Note 4WD Warning Indicator 4WD indicator light Indicator light is ON / OFF Observer combination meter OK The 4WD indicator light turns ON and OFF. OK --> REPLACE 4WD CONTROL ECU NG: Go to next step
  3. CHECK COMBINATION METER Inspect the combination meter.Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-493475-S17967067432012081000000) . Result The combination meter assembly system is normal. NG --> REPLACE COMBINATION METER OK --> REPLACE 4WD CONTROL ECU

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