Transfer Case (Diagnostics - Introduction) (Except Hybrid): Other Toyota Highlander III

CAUTION / NOTICE / HINT

HINT

1. Use the following procedure listed to troubleshoot the Dynamic Torque Control AWD system.
2. *: Use the Techstream.

PROCEDURE

1. VEHICLE BROUGHT TO WORKSHOP Result Proceed to NEXT Result: 1 NEXT See step 2
2. INSPECT BATTERY VOLTAGE Standard Voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step. Result Proceed to NEXT Result: 1 NEXT See step 3
3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* Use the Techstream to check if the CAN communication system is functioning normally. Refer to «DIAGNOSIS SYSTEM [12/2013 - ]»(ref-636255-S39848500622014070700000) HINT: The ECU of this system is connected to the CAN communication system. Therefore before starting troubleshooting, make sure to check the CAN communication system is functioning normally. Result Result Proceed to CAN DTCs are not output A CAN DTCs are output B Result: 2 B GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - ]»(ref-636251-S13482294662014070700000) Result: 1 A See step 4
4. CHECK DTC AND FREEZE FRAME DATA* Check for DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Trouble Codes Check for freeze frame data. HINT: Record or print DTCs and freeze frame data if necessary. Clear the DTCs and freeze frame data. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Clear DTCs Recheck for DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Trouble Codes Result Result Proceed to DTCs are not output A DTCs are output B Result: 3 B See step 9 Result: 1 A See step 5
5. PROBLEM SYMPTOMS TABLE Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE [12/2013 - ]»(ref-636043-S35821192112014070700000) Result Result Proceed to Fault not listed in problem symptoms table A Fault listed in problem symptoms table B Result: 2 B See step 7 Result: 1 A See step 6
6. OVERALL ANALYSIS AND TROUBLESHOOTING* Terminals of ECU. Refer to «TERMINALS OF ECU [12/2013 - ]»(ref-636043-S18454139992014070700000) Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST [12/2013 - ]»(ref-636043-S12263227022014070700000) Result Proceed to NEXT Result: 1 NEXT See step 7
7. REPAIR OR REPLACE Result Proceed to NEXT Result: 1 NEXT See step 8
8. CONFIRM TEST Result Proceed to NEXT Result: 1 NEXT END
9. GO TO DTC CHART Refer to «DIAGNOSTIC TROUBLE CODE CHART [12/2013 - ]»(ref-636043-S32787253282014070700000) Result Proceed to NEXT Result: 1 NEXT See step 7

FREEZE FRAME DATA [12/2013 - ]

1. FREEZE FRAME DATA When a DTC is stored, the 4WD ECU assembly stores the current vehicle state as Freeze Frame Data. HINT: Freeze Frame Data at the time a DTC is stored: When the 4WD ECU assembly stores data at the time a DTC is stored, no updates will be performed until the data is cleared. "Number of IG ON" is not stored as Freeze Frame Data.
2. CHECK FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Chassis / Four Wheel Drive / Trouble Codes. Chassis > Four Wheel Drive > Trouble Codes According to the display on the Techstream, select the trouble code data display with Freeze Frame Data. Chassis > Four Wheel Drive Tester Display Measurement Item Range Normal Condition Diagnostic Note Vehicle Speed Maximum wheel speed sensor reading Min.: 0 km/h (0 mph) Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) No large fluctuations when driving at a constant speed. Forward and Rearward G Forward and rearward G Min.: -25.10 m/s 2 Max.: 24.90 m/s 2 - Changes in proportion with acceleration/deceleration. FR Wheel Speed Front wheel speed sensor RH reading Min.: 0 km/h (0 mph) Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) No large fluctuations when driving at a constant speed. FL Wheel Speed Front wheel speed sensor LH reading Min.: 0 km/h (0 mph) Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) No large fluctuations when driving at a constant speed. RR Wheel Speed Rear wheel speed sensor RH reading Min.: 0 km/h (0 mph) Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) No large fluctuations when driving at a constant speed. RL Wheel Speed Rear wheel speed sensor LH reading Min.: 0 km/h (0 mph) Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) No large fluctuations when driving at a constant speed. Accelerator Opening Angle % Accelerator pedal depression amount Min.: 0% Max.: 127% When the accelerator pedal is released: 0% Changes in proportion to the movement of the pedal during accelerator pedal operation. Real Engine Torque Real engine torque Min.: -1024 Nm Max.: 1023 Nm - - Steering Angle Sensor Steering angle value Min.: - 3276.8° Max.: 3276.7° Left turn: Increases Right turn: Decreases - IG1 Voltage Value IG1 voltage value Min.: 0 V Max.: 20 V Ignition switch ON: 11 to 14 V - Stop Light SW Stop light switch ON or OFF ON: Brake pedal depressed OFF: Brake pedal released - Parking Brake SW Parking brake switch ON or OFF OFF: Parking brake released ON: Parking brake applied - Number of IG ON Number of operations of ignition switch being turned ON after storing Freeze Frame Data 0 to 31 0 - Yaw Rate Sensor Yaw rate value Min.: -128°/s Max.: 127°/s Vehicle stopped: 0°/s Turning right: -128 to 0°/s Turning left: 0 to 127°/s - Lateral G Lateral G Min.: -25.10 m/s 2 Max.: 24.90 m/s 2 - Changes in proportion with the pedal movement speed when the brake pedal is being operated.
3. CLEAR FREEZE FRAME DATA NOTE: Clearing the DTCs will also clear the Freeze Frame Data. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Clear the DTCs and Freeze Frame Data. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000)

FAIL-SAFE CHART [12/2013 - ]

1. FAIL-SAFE FUNCTION If the following malfunctions occur, the 4WD ECU assembly will stop the function of the dynamic torque control AWD system or partly change the function to control the system. If a malfunction occurs in the sensor signal or actuator, the flow of electricity to the 4WD linear solenoid of the electro magnetic control coupling sub-assembly is prohibited. As a result, the system enters front wheel drive condition. When a component of the system malfunctions and the fail-safe function activates, the component operation is prohibited. However, if the system is controlling the component and the fail-safe function activates, the system operation is gradually stopped to prevent sudden changes in the vehicle condition. When system control is not possible, a warning message is displayed to indicate that system operation has stopped.