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Transfer Case (Diagnostic Codes & Circuit Tests) (Except Hybrid): Other Toyota Highlander III

Transfer Case 3 illustrations ~5827 words

CAUTION / NOTICE / HINT

HINT

Check the condition of each related circuit connector before troubleshooting.

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2013 - ]

PROCEDURE

  1. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > ABS/VSC/TRAC > Clear DTCs Turn the ignition switch off. Turn the ignition switch to ON again and check that no CAN communication system DTCs are output. Refer to «DIAGNOSIS SYSTEM [12/2013 - ]»(ref-636255-S39848500622014070700000) Start the engine. Drive the vehicle at a speed of 35 km/h (22 mph), turn the steering wheel to the right and left and check that no brake control system (steering sensor) DTCs (C1432, C1433 or C1434) are output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636012-S36804310282014070700000) Chassis > ABS/VSC/TRAC > Trouble Codes HINT: When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor. Result Result Proceed to Neither CAN communication system DTCs nor brake control system DTCs are output A CAN communication system DTCs are output B Brake control system (steering sensor) DTCs (C1432, C1433 or C1434) are output C 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: 4 C REPAIR CIRCUIT INDICATED BY OUTPUT CODE (BRAKE CONTROL SYSTEM). Refer to «DIAGNOSTIC TROUBLE CODE CHART [12/2013 - ]»(ref-636012-S01774530032014070700000) Result: 1 A See step 2
  2. READ VALUE USING TECHSTREAM (STEERING ANGLE VALUE) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Chassis / Four Wheel Drive / Data List. Read the value displayed on the Techstream. Chassis > Four Wheel Drive > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note Steering Angle Value Steering angle value Min.: -3276.8° Max.: 3276.7° Left turn: Increases Right turn: Decreases Changes in proportion with the amount of steering wheel rotation during steering operation. Chassis > Four Wheel Drive > Data List Tester Display Steering Angle Value OK The steering angle sensor value changes in accordance with the steering wheel movement. Result Proceed to OK NG Result: 1 OK REPLACE 4WD ECU ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S08767359682014070700000) Result: 2 NG REPLACE STEERING SENSOR. Refer to «COMPONENTS [12/2013 - ]»(ref-636210-S33320695182014070700000)

HINT

Check the condition of each related circuit connector before troubleshooting.

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2013 - ]

Scheme 85

Scheme 85: PROCEDURE
Scheme 85: PROCEDURE
  1. CHECK HARNESS AND CONNECTOR (4WD ECU ASSEMBLY - TRANSMISSION COUPLING ASSEMBLY) Disconnect the F14 4WD ECU assembly connector. *a Front view of wire harness connector (to 4WD ECU Assembly) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F14-2 (SLC+) - F14-1 (SLC-) 20°C (68°F) 2.2 to 2.6 ohms F14-2 (SLC+) - Body ground Always 10 kohms or higher F14-1 (SLC-) - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 1 OK REPLACE 4WD ECU ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S08767359682014070700000) Result: 2 NG See step 2
  2. INSPECT ELECTRO MAGNETIC CONTROL COUPLING SUB-ASSEMBLY Disconnect the O4 4WD linear solenoid (electro magnetic control coupling sub-assembly) connector. *a Component without harness connected (4WD Linear Solenoid (Electro Magnetic Control Coupling Sub-assembly) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (BSF) - 2 (SLC) 20°C (68°F) 2.2 to 2.6 ohms 1 (BSF) - Body ground Always 10 kohms or higher 2 (SLC) - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 1 OK REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 2 NG REPLACE ELECTRO MAGNETIC CONTROL COUPLING SUB-ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636233-S09152201832014070700000)

HINT

Check the condition of each related circuit connector before troubleshooting.

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2013 - ]

  1. CHECK VEHICLE USAGE Check that there has been no unintended vehicle usage. OK There is no evidence of rough use (the vehicle has not been driven on damaged or snowy roads, etc. for a long time). Result Proceed to OK NG Result: 2 NG CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - ]»(ref-636009-S20772610692014070700000) Result: 1 OK See step 2
  2. CHECK FOR DTC Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Check if the brake control system DTC is output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636012-S36804310282014070700000) Chassis > ABS/VSC/TRAC > Trouble Codes Read the DTCs using the Techstream. Result Result Proceed to Only DTC C1299/99 is output A DTC C1299/99 and other DTCs (brake control system DTC) B Result: 4 B REPAIR CIRCUIT INDICATED BY OUTPUT CODE (BRAKE CONTROL SYSTEM). Refer to «DIAGNOSTIC TROUBLE CODE CHART [12/2013 - ]»(ref-636012-S01774530032014070700000) Result: 1 A See step 3
  3. CHECK RELATED PART Check the condition, size and tire pressure of the front and rear tires. Inspect the suspension and ball joint, etc. for rattles. Inspect the drive shaft and propeller shaft rotation condition. Result Proceed to OK NG Result: 3 NG REPAIR OR REPLACE MALFUNCTIONING PARTS Result: 1 OK See step 4
  4. RECONFIRM DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Clear DTCs Start the engine. Drive the vehicle at a speed of 20 km/h (12 mph) or more and check that the same DTC is output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Trouble Codes Result Result Proceed to DTCs are output A DTCs are not output B Result: 2 B CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - ]»(ref-636009-S20772610692014070700000) Result: 1 A See step 5
  5. REPLACE 4WD ECU ASSEMBLY Replace the 4WD ECU assembly. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S08767359682014070700000) NOTE: When the 4WD ECU assembly is replaced with a new one, it is not necessary to perform calibration. Refer to «CALIBRATION [12/2013 - ]»(ref-636043-S13637456002014070700000) Result Proceed to NEXT Result: 1 NEXT See step 6
  6. RECONFIRM DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Clear DTCs Start the engine. Drive the vehicle at a speed of 20 km/h (12 mph) or more and check that the same DTC is output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Trouble Codes Result Result Proceed to DTCs are output A DTCs are not output B Result: 1 A REPLACE ELECTRO MAGNETIC CONTROL COUPLING SUB-ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636233-S09152201832014070700000) Result: 2 B END

HINT

Check the condition of each related circuit connector before troubleshooting.

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2013 - ]

  1. CHECK TIRE CONDITION Check the size and condition of all 4 tires. Refer to «PROCEDURE - Step 1»(ref-636263-S36811867682014070700000) 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. Result Proceed to OK NG Result: 2 NG PERFORM AIR PRESSURE ADJUSTMENT OR REPLACE TIRES SO THAT ALL 4 TIRES ARE SAME IN SIZE. Refer to «INSPECTION [12/2013 - ]»(ref-636263-S26531347252014070700000) Result: 1 OK See step 2
  2. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Clear DTCs Start the engine. Drive the vehicle at a speed of 20 km/h (12 mph) or more so that the same DTC is output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Trouble Codes Check if speed sensor DTCs (brake control system DTCs) are output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636012-S36804310282014070700000) Chassis > ABS/VSC/TRAC > Trouble Codes Read the DTCs using the Techstream. Result Result Proceed to Only DTC C1377/91 is output A DTCs are not output B Speed sensor DTCs (brake control system DTC) are output C Result: 2 B CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - ]»(ref-636009-S20772610692014070700000) Result: 4 C REPAIR CIRCUIT INDICATED BY OUTPUT CODE (BRAKE CONTROL SYSTEM). Refer to «DIAGNOSIS SYSTEM [12/2013 - ]»(ref-636012-S03843009942014070700000) Result: 1 A See step 3
  3. CHECK HARNESS AND CONNECTOR (SPEED SENSOR - BRAKE ACTUATOR ASSEMBLY) Make sure that there is no looseness at the locking part and the connecting part of the connectors. Turn the ignition switch off. Disconnect the A47 skid control ECU (brake actuator assembly) connector. Disconnect the A34, A35, O3 and/or O2 speed sensor connector(s). Measure the resistance according to the value(s) in the table below. Standard Resistance FOR FRONT RH: Tester Connection Condition Specified Condition A47-7 (FR+) - A35-2 (FR+) Always Below 1 ohms A47-7 (FR+) or A35-2 (FR+) - Body ground Always 10 kohms or higher A47-6 (FR-) - A35-1 (FR-) Always Below 1 ohms A47-6 (FR-) or A35-1 (FR-) - Body ground Always 10 kohms or higher FOR FRONT LH: Tester Connection Condition Specified Condition A47-19 (FL+) - A34-2 (FL+) Always Below 1 ohms A47-19 (FL+) or A34-2 (FL+) - Body ground Always 10 kohms or higher A47-18 (FL-) - A34-1 (FL-) Always Below 1 ohms A47-18 (FL-) or A34-1 (FL-) - Body ground Always 10 kohms or higher FOR REAR RH: Tester Connection Condition Specified Condition A47-17 (RR+) - O3-2 (RR+) Always Below 1 ohms A47-17 (RR+) or O3-2 (RR+) - Body ground Always 10 kohms or higher A47-16 (RR-) - O3-1 (RR-) Always Below 1 ohms A47-16 (RR-) or O3-1 (RR-) - Body ground Always 10 kohms or higher FOR REAR LH: Tester Connection Condition Specified Condition A47-5 (RL+) - O2-3 (RL+) Always Below 1 ohms A47-5 (RL+) or O2-3 (RL+) - Body ground Always 10 kohms or higher A47-4 (RL-) - O2-1 (RL-) Always Below 1 ohms A47-4 (RL-) or O2-1 (RL-) - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 4
  4. PERFORM TEST MODE (SIGNAL CHECK) Turn the ignition switch off. Perform the sensor check in the Test Mode procedure. Refer to «TEST MODE PROCEDURE [12/2013 - ]»(ref-636012-S28065780312014070700000) Chassis > ABS/VSC/TRAC > Utility Tester Display Signal Check OK All Test Mode DTCs are cleared. Result Proceed to OK NG Result: 2 NG See step 6 Result: 1 OK See step 5
  5. RECONFIRM DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Clear DTCs Start the engine. Drive the vehicle at a speed of 20 km/h (12 mph) or more and check that the same DTC is output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Trouble Codes Result Result Proceed to DTCs are output A DTCs are not output B Result: 1 A REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636210-S31992734862014070700000) Result: 3 B CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - ]»(ref-636009-S20772610692014070700000)
  6. CHECK SPEED SENSOR ROTOR Turn the ignition switch off. Remove the front speed sensor rotor (front drive shaft assembly) or rear speed sensor rotor (rear axle hub and bearing assembly). For front: Refer to «REMOVAL [12/2013 - ]»(ref-636233-S26455853592014070700000) For rear: Refer to «REMOVAL [12/2013 - ]»(ref-636233-S20094016982014070700000) Check the speed sensor rotor. OK No scratches, oil, or foreign matter on the rotors. NOTE: Check the speed sensor signal after cleaning or replacement. Refer to «TEST MODE PROCEDURE [12/2013 - ]»(ref-636012-S28065780312014070700000) HINT: If the front speed sensor rotor needs to be replaced, replace it together with the front drive shaft assembly. If the rear speed sensor rotor needs to be replaced, replace it together with the rear axle hub and bearing assembly. Result Proceed to OK NG Result: 2 NG CLEAN OR REPLACE SPEED SENSOR ROTOR Result: 1 OK See step 7
  7. REPLACE SPEED SENSOR Turn the ignition switch off. Replace the front speed sensor or the rear speed sensor. For front: Refer to «COMPONENTS [12/2013 - ]»(ref-636210-S12593907502014070700000) For rear: Refer to «COMPONENTS [12/2013 - ]»(ref-636210-S27318312922014070700000) NOTE: Check the speed sensor signal after replacement. Refer to «TEST MODE PROCEDURE [12/2013 - ]»(ref-636012-S28065780312014070700000) Result Proceed to NEXT Result: 1 NEXT See step 8
  8. RECONFIRM DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Clear DTCs Start the engine. Drive the vehicle at a speed of 20 km/h (12 mph) or more and check that the same DTC is output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Trouble Codes HINT: Reinstall the sensor, connectors, etc. and restore the vehicle to its prior condition before rechecking DTCs. Result Result Proceed to DTCs are output A DTCs are not output B Result: 2 B END Result: 1 A See step 9
  9. REPLACE BRAKE ACTUATOR ASSEMBLY Replace the skid control ECU (brake actuator assembly). Refer to «COMPONENTS [12/2013 - ]»(ref-636210-S31992734862014070700000) Result Proceed to NEXT Result: 1 NEXT See step 10
  10. RECONFIRM DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Clear DTCs Start the engine. Drive the vehicle at a speed of 20 km/h (12 mph) or more and check that the same DTC is output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Trouble Codes Result Result Proceed to DTCs are output A DTCs are not output B Result: 1 A REPLACE 4WD ECU ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S08767359682014070700000) Result: 2 B END

HINT

Check the condition of each related circuit connector before troubleshooting.

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2013 - ]

Scheme 86

Scheme 86: PROCEDURE
Scheme 86: PROCEDURE
  1. CHECK HARNESS AND CONNECTOR (IG1 TERMINAL) Disconnect the F14 4WD ECU assembly connector. *a Front view of wire harness connector (to 4WD ECU Assembly) Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F14-3 (IG1) -Body ground Ignition switch ON 11 to 14 V Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 2
  2. CHECK HARNESS AND CONNECTOR (GND TERMINAL) Turn the ignition switch off. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F14-4 (GND) -Body ground Always Below 1 ohms Result Proceed to OK NG *a Front view of wire harness connector (to 4WD ECU Assembly) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 3
  3. RECONFIRM DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Clear DTCs Turn the ignition switch to ON. Check that no DTCs other than DTC C120C/79 have been output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Trouble Codes Result Result Proceed to DTCs other than DTC C120C/79 are not output A DTCs other than DTC C120C/79 are output B Result: 1 A REPLACE 4WD ECU ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S08767359682014070700000) Result: 2 B REPAIR CIRCUIT INDICATED BY OUTPUT CODE. Refer to «DIAGNOSTIC TROUBLE CODE CHART [12/2013 - ]»(ref-636043-S32787253282014070700000)
  1. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Trouble Codes Record the output DTCs (dynamic torque control AWD system). HINT: When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor. Result Proceed to NEXT Result: 1 NEXT GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - ]»(ref-636251-S13482294662014070700000)

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

Check the condition of each related circuit connector before troubleshooting.

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2013 - ]

  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM AND BRAKE CONTROL SYSTEM) Clear the DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636012-S36804310282014070700000) Chassis > ABS/VSC/TRAC > Clear DTCs Turn the ignition switch off. Turn the ignition switch to ON again and check that no CAN communication system DTCs are output. Refer to «DIAGNOSTIC TROUBLE CODE CHART [12/2013 - ]»(ref-636255-S15919846862014070700000) Start the engine. Drive the vehicle, accelerate to a speed of 3 km/h (2 mph) or more for 60 seconds or more, and check if the speed sensor DTC (brake control system DTC) is output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636012-S36804310282014070700000) Chassis > ABS/VSC/TRAC > Trouble Codes HINT: When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor. Result Result Proceed to Neither CAN communication system DTCs nor speed sensor DTCs (brake control system DTC) are output A CAN communication system DTCs are output B Brake control system (speed sensor) DTC is output C 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: 4 C REPAIR CIRCUIT INDICATED BY OUTPUT CODE (BRAKE CONTROL SYSTEM). Refer to «DIAGNOSTIC TROUBLE CODE CHART [12/2013 - ]»(ref-636012-S01774530032014070700000) Result: 1 A See step 2
  2. INSPECT BATTERY Check the battery voltage. Standard Voltage 11 to 14 V Result Proceed to OK NG Result: 2 NG CHECK CHARGING SYSTEM. Refer to «ON-VEHICLE INSPECTION [12/2013 - ]»(ref-636187-S00317975522014070700000) Result: 1 OK See step 3
  3. CHECK HARNESS AND CONNECTOR (IG1 TERMINAL) Disconnect the F14 4WD ECU assembly connector. *a Front view of wire harness connector (to 4WD ECU Assembly) Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F14-3 (IG1) - Body ground Ignition switch ON 11 to 14 V Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 4
  4. CHECK HARNESS AND CONNECTOR (GND TERMINAL) Turn the ignition switch off. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F14-4 (GND) - Body ground Always Below 1 ohms *a Front view of wire harness connector (to 4WD ECU Assembly) Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 5
  5. RECONFIRM DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Clear DTCs Start the engine. Drive the vehicle, accelerate to a speed of 3 km/h (2 mph) or more for 60 seconds or more, and check if the same DTC is output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Trouble Codes HINT: Reinstall the sensor, connectors, etc. and restore the vehicle to its prior condition before rechecking DTCs. Result Result Proceed to DTCs are output A DTCs are not output B Result: 1 A REPLACE 4WD ECU ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S08767359682014070700000) Result: 2 B CHECK FOR INTERMITTENT PROBLEMS. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - ]»(ref-636009-S20772610692014070700000)

HINT

Check the condition of each related circuit connector before troubleshooting.

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2013 - ]

  1. CHECK FOR DTC (ENGINE CONTROL SYSTEM) Check if the engine control system DTC is output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636036-S39197130512014070700000) Powertrain > Engine > Trouble Codes Result Result Proceed to Engine control system DTCs are not output A Engine control system DTCs are output B Result: 1 A REPLACE 4WD ECU ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S08767359682014070700000) Result: 2 B GO TO ENGINE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART [12/2013 - ]»(ref-636036-S07011333302014070700000)

HINT

Check the condition of each related circuit connector before troubleshooting.

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2013 - ]

  1. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > ABS/VSC/TRAC > Clear DTCs Turn the ignition switch off. Turn the ignition switch to ON again and check that no CAN communication system DTCs are output. Refer to «DIAGNOSIS SYSTEM [12/2013 - ]»(ref-636255-S39848500622014070700000) 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) and acceleration sensor DTC are output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636012-S36804310282014070700000) Chassis > ABS/VSC/TRAC > Trouble Codes HINT: When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor. Result Result Proceed to Neither CAN communication system DTCs nor brake control system DTCs (speed sensor or acceleration sensor DTC) are output A CAN communication system DTCs are output B Brake control system DTCs (speed sensor or acceleration sensor DTC) are output C Result: 3 B GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - ]»(ref-636251-S13482294662014070700000) Result: 4 C REPAIR CIRCUIT INDICATED BY OUTPUT CODE (BRAKE CONTROL SYSTEM). Refer to «DIAGNOSTIC TROUBLE CODE CHART [12/2013 - ]»(ref-636012-S01774530032014070700000) Result: 1 A See step 2
  2. READ VALUE USING TECHSTREAM (WHEEL SPEED) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Chassis / Four Wheel Drive / Data List. Read the value displayed on the Techstream. Chassis > Four Wheel Drive > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note 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. Chassis > Four Wheel Drive > Data List Tester Display FR Wheel Speed FL Wheel Speed RR Wheel Speed RL Wheel Speed OK The speed value output from the speed sensor displayed on the Techstream is the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer). Result Proceed to OK NG Result: 3 NG See step 4 Result: 1 OK See step 3
  3. READ VALUE USING TECHSTREAM (FORWARD AND REARWARD G) Enter the following menus: Chassis / Four Wheel Drive / Data List. Read the value displayed on the Techstream. Chassis > Four Wheel Drive Tester Display Measurement Item Range Normal Condition Diagnostic Note Forward and Rearward G Forward and Rearward G Min.: -25.10 m/s 2 Max.: 24.90 m/s 2 Approximately 0 +/-0.13 m/s 2 while stationary Changes in proportion with acceleration/deceleration. Chassis > Four Wheel Drive > Data List Tester Display Forward and Rearward G OK The acceleration sensor (airbag sensor assembly) output value is normal. Result Proceed to OK NG Result: 1 OK REPLACE 4WD ECU ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S08767359682014070700000) Result: 3 NG REPLACE AIRBAG SENSOR ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636010-S28779450022014070700000)
  4. PERFORM TEST MODE (SIGNAL CHECK) Turn the ignition switch off. Perform the sensor check in the Test Mode procedure. Refer to «TEST MODE PROCEDURE [12/2013 - ]»(ref-636012-S28065780312014070700000) Chassis > ABS/VSC/TRAC > Utility Tester Display Signal Check Check if speed sensor DTCs (brake control system DTC) are output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636012-S36804310282014070700000) Chassis > ABS/VSC/TRAC > Trouble Codes Result Result Proceed to Speed sensor DTCs are not output A Speed sensor DTCs are output B Result: 1 A REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636210-S31992734862014070700000) Result: 2 B REPAIR CIRCUIT INDICATED BY OUTPUT CODE (BRAKE CONTROL SYSTEM). Refer to «DIAGNOSTIC TROUBLE CODE CHART [12/2013 - ]»(ref-636012-S01774530032014070700000)

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

Check the condition of each related circuit connector before troubleshooting.

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2013 - ]

  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM AND DYNAMIC TORQUE CONTROL AWD SYSTEM) Check if CAN communication system DTCs are output. Refer to «DIAGNOSIS SYSTEM [12/2013 - ]»(ref-636255-S39848500622014070700000) Check if the dynamic torque control AWD system DTC is output. Refer to «DTC CHECK / CLEAR [12/2013 - ]»(ref-636043-S29747173532014070700000) Chassis > Four Wheel Drive > Trouble Codes HINT: When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor. Result Result Proceed to Neither CAN communication system DTCs nor dynamic control AWD system DTCs are output A CAN communication DTCs are output B Dynamic torque control AWD system DTCs are output C Result: 2 B GO TO CAN COMMUNICATION (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - ]»(ref-636251-S13482294662014070700000) Result: 4 C REPAIR CIRCUIT INDICATED BY OUTPUT CODE (DYNAMIC TORQUE CONTROL AWD SYSTEM). Refer to «DIAGNOSTIC TROUBLE CODE CHART [12/2013 - ]»(ref-636043-S32787253282014070700000) Result: 1 A See step 2
  2. CHECK 4WD ECU ASSEMBLY Check if the 4WD ECU assembly connector is securely connected. OK The connector is securely connected. Result Proceed to OK NG Result: 2 NG CONNECT CONNECTOR TO ECU CORRECTLY Result: 1 OK See step 3
  3. INSPECT BATTERY Check the battery voltage. Standard Voltage 11 to 14 V Result Proceed to OK NG Result: 2 NG CHECK CHARGING SYSTEM. Refer to «ON-VEHICLE INSPECTION [12/2013 - ]»(ref-636187-S00317975522014070700000) Result: 1 OK See step 4
  4. CHECK HARNESS AND CONNECTOR (IG1 TERMINAL) Disconnect the F14 4WD ECU assembly connector. *a Front view of wire harness connector (to 4WD ECU Assembly) Turn the ignition switch to ON. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F14-3 (IG1) - Body ground Ignition switch ON 11 to 14 V Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 5
  5. CHECK HARNESS AND CONNECTOR (GND TERMINAL) Turn the ignition switch off. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F14-4 (GND) - Body ground Always Below 1 ohms *a Front view of wire harness connector (to 4WD ECU Assembly) Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 6
  6. READ VALUE USING TECHSTREAM (4WD WARNING LIGHT) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Chassis / Four Wheel Drive / Data List. According to the display on the Techstream, read the Data List. Chassis > Four Wheel Drive > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note 4WD Warning Light AWD warning (multi-information display) OFF or ON OFF: Warning off ON: Warning on - Chassis > Four Wheel Drive > Data List Tester Display 4WD Warning Light Check the Techstream display condition of the AWD warning light. Result Result Proceed to Display of the Data List remains OFF A Display of the Data List remains ON B Result: 1 A GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - ]»(ref-636022-S06527104052014070700000) Result: 2 B REPLACE 4WD ECU ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S08767359682014070700000)

HINT

Check the condition of each related circuit connector before troubleshooting.

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2013 - ]

  1. CHECK CAN COMMUNICATION SYSTEM Check if CAN communication system DTCs are output. Refer to «DIAGNOSIS SYSTEM [12/2013 - ]»(ref-636255-S39848500622014070700000) HINT: When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor. Result Result Proceed to CAN communication system DTCs are not output A CAN communication system 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 2
  2. INSPECT AWD WARNING Turn the ignition switch off. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Chassis / Four Wheel Drive / Active Test Chassis > Four Wheel Drive > Active Test Tester Display Measurement Item Control Range Diagnostic Note 4WD Warning Light AWD warning (multi-information display) Warning ON/OFF Observe the multi-information display. Chassis > Four Wheel Drive > Active Test Tester Display 4WD Warning Light When performing the 4WD Warning Light Active Test, check 4WD Warning Light in the Data List. Chassis > Four Wheel Drive > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note 4WD Warning Light AWD warning (multi-information display) ON or OFF ON: Warning on OFF: Warning off - Chassis > Four Wheel Drive > Data List Tester Display 4WD Warning Light Result Result Proceed to Does not change between ON and OFF A Changes between ON and OFF B Result: 1 A REPLACE 4WD ECU ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S08767359682014070700000) Result: 2 B GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - ]»(ref-636022-S06527104052014070700000)

HINT

Check the condition of each related circuit connector before troubleshooting.

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2013 - ]

Scheme 87

Scheme 87: PROCEDURE
Scheme 87: PROCEDURE
  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM) Check if CAN communication system DTCs are output. Refer to «DIAGNOSIS SYSTEM [12/2013 - ]»(ref-636255-S39848500622014070700000) Result Result Proceed to CAN communication system DTCs are not output A CAN communication system 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 2
  2. INSPECT DLC3 Turn the ignition switch to ON. *a Front view of DLC3 Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F25-13 (TC) - F25-4 (CG) Ignition switch ON 11 to 14 V Result Proceed to OK NG Result: 1 NG See step 4 Result: 2 OK See step 3
  3. REPLACE ECM Replace the ECM. *a Front view of DLC3 Refer to «COMPONENTS [12/2013 - ]»(ref-636218-S27271340552014070700000) Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3. SST: 09843-18040 Turn the ignition switch to ON. Check that the "DIAGNOSIS CODE AWD FF" or "DIAGNOSIS CODE AWD XX (DTC)" is displayed. Result Result Proceed to "DIAGNOSIS CODE AWD FF" or "DIAGNOSIS CODE AWD XX (DTC)" is displayed A "DIAGNOSIS CODE AWD FF" and "DIAGNOSIS CODE XX (DTC)" are not displayed B Result: 1 A END Result: 2 B REPLACE 4WD ECU ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S08767359682014070700000)
  4. CHECK HARNESS AND CONNECTOR (TC OF DLC3 - TC OF ECM AND BODY GROUND) Turn the ignition switch off. Disconnect the A43 ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F25-13 (TC) - A43-45 (TC) Always Below 1 ohms F25-13 (TC) - Body ground Always 10 kohms or higher Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 5
  5. CHECK HARNESS AND CONNECTOR (CG OF DLC3 - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F25-4 (CG) - Body ground Always Below 1 ohms *a Front view of DLC3 Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 6
  6. REPLACE ECM Replace the ECM. *a Front view of DLC3 Refer to «COMPONENTS [12/2013 - ]»(ref-636218-S27271340552014070700000) Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3. SST: 09843-18040 Turn the ignition switch to ON. Check that the "DIAGNOSIS CODE AWD FF" or "DIAGNOSIS CODE AWD XX (DTC)" is displayed. Result Result Proceed to "DIAGNOSIS CODE AWD FF" or "DIAGNOSIS CODE AWD XX (DTC)" is displayed A "DIAGNOSIS CODE AWD FF" and "DIAGNOSIS CODE XX (DTC)" are not displayed B Result: 1 A END Result: 2 B REPLACE 4WD ECU ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S08767359682014070700000)

HINT

Check the condition of each related circuit connector before troubleshooting.

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2013 - ]

  1. INSPECT 4WD LOCK LIGHT Turn the ignition switch off. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Chassis / Four Wheel Drive / Active Test Chassis > Four Wheel Drive > Active Test Tester Display Measurement Item Control Range Diagnostic Note 4WD LOCK Light AWD lock mode indicator light Indicator light OFF/ON Observe combination meter assembly Chassis > Four Wheel Drive > Active Test Tester Display 4WD LOCK Light When performing the 4WD Warning Light Active Test, check 4WD Warning Light in the Data List. Chassis > Four Wheel Drive > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note 4WD LOCK Light AWD lock mode indicator light OFF or ON OFF: AWD lock mode indicator light off OFF: AWD lock mode indicator light on - Chassis > Four Wheel Drive > Data List Tester Display 4WD LOCK Light Result Result Proceed to Changes between ON and OFF A Does not change between ON and OFF B Result: 2 B REPLACE 4WD ECU ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S08767359682014070700000) Result: 1 A See step 2
  2. INSPECT DIFFERENTIAL LOCK SWITCH Remove the AWD lock switch (differential lock switch). Refer to «REMOVAL [12/2013 - ]»(ref-636237-S14086040612014070700000) Inspect the AWD lock switch (differential lock switch). Refer to «INSPECTION [12/2013 - ]»(ref-636237-S09818100992014070700000) Result Proceed to OK NG Result: 2 NG REPLACE DIFFERENTIAL LOCK SWITCH. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S03818989972014070700000) Result: 1 OK See step 3
  3. CHECK HARNESS AND CONNECTOR (DIFFERENTIAL LOCK SWITCH - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F56-6 (GND) - Body ground Always Below 1 ohms *a Front view of wire harness connector (to AWD Lock Switch (Differential Lock Switch) Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 4
  4. CHECK HARNESS AND CONNECTOR (DIFFERENTIAL LOCK SWITCH - 4WD ECU ASSEMBLY) Reinstall the AWD lock switch (differential lock switch). Refer to «INSTALLATION [12/2013 - ]»(ref-636237-S10346454932014070700000) Disconnect the F14 4WD ECU assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F14-10 (4WDL) - Body ground AWD lock switch on Below 1 ohms AWD lock switch off 10 kohms or higher *a Front view of wire harness connector (to 4WD ECU Assembly) Result Proceed to OK NG Result: 1 OK REPLACE 4WD ECU ASSEMBLY. Refer to «COMPONENTS [12/2013 - ]»(ref-636237-S08767359682014070700000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR

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