Active Torque Control 4WD System (Diagnostics - Introduction): Diagnosis Toyota Matrix E140

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. Use the procedure listed to troubleshoot the Active Torque Control 4WD system.
2. *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. INSPECT BATTERY VOLTAGE Standard voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding. NEXT: Go to next step
3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* Use the Techstream to check if the CAN communication system is functioning normally. Result Result Proceed to CAN DTC is not output A CAN DTC is output B B --> Go to «CAN COMMUNICATION SYSTEM»(ref-427503-S21453051922011101200000) A: Go to next step
4. CHECK DTC* Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-427522-S38482648402011101200000) . Clear the DTCs. Recheck for DTCs. Result Result Proceed to DTC does not reoccur A DTC reoccurs B B --> GO TO STEP 8 A: Go to next step
5. PROBLEM SYMPTOMS TABLE Result Result Proceed to Fault not listed in problem symptoms table A Fault listed in problem symptoms table B B --> Go to step 8 A: Go to next step
6. OVERALL ANALYSIS AND TROUBLESHOOTING* Terminals of ECU. Refer to «TERMINALS OF ECU»(ref-427522-S15019359622011101200000) . Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST»(ref-427522-S12760009872011101200000) . NEXT: Go to next step
7. REPAIR OR REPLACE NEXT: Go to next step
8. CONFIRMATION TEST NEXT --> END

Scheme 107

1. DESCRIPTION HINT: When using a chassis dynamometer, brake tester, etc. to perform a vehicle test, activate test mode to avoid a "different tire diameter installed" incorrect judgment. Test mode does not have a 4WD parameter. Test mode is activated because it will prohibit a different tire diameter judgment. Control Status 4WD Control Status During test mode Different tire diameter malfunction judgement (detection that tire diameter of 4 wheels are not same) is not performed.
2. ACTIVATE TEST MODE HINT: Activate test mode before using a chassis dynamometer, brake tester, etc. to perform a vehicle test. Check that the ignition switch is off. Use either of the following methods to change the 4WD ECU to test mode. Test mode activation through the Techstream. Connect the Techstream to the DLC3 connector and turn the ignition switch to ON. Using the test mode activation function (mode 10), activate test mode. Test mode activation by shorting TS terminal. With the ignition switch off, short-circuit the TS and CG terminals of the DLC3 connector. Then turn the ignition switch to ON to activate test mode. NOTE: When the ignition switch is turned from OFF to ON, the 4WD warning light will illuminate for 4 seconds. Then it will turn off. NOTE: If a part of the 4WD system has a defect, the 4WD warning light will illuminate. Check if the 4WD warning light has changed to the test mode display. Start the engine.

PROBLEM SYMPTOMS TABLE

HINT

1. Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
2. Inspect the fuses and relays related to this system before inspecting the suspected areas below.

ACTIVE TORQUE CONTROL 4WD SYSTEM

HINT

*:When driving 4WD mode, the vehicle is hard to turn, as if the brakes were applied, due to the rotational difference between the front and rear tires while turning.

Scheme 108

Scheme 109

1. CHECK 4WD CONTROL ECU Measure the voltage and resistance of the connector. Terminal No. (Symbol) Terminal Description Condition Specified Condition 14 (CANH) - 16 (CANL) CAN communication Ignition switch off 54 to 69 ohms 23 (GND) - Body ground Ground Always Below 1 ohms 11 (IG1) - 23 (GND) Power source voltage Ignition switch ON 10 to 14 V 13 (SLC+) - 32 (SLC-) 4WD linear solenoid signal Ignition switch ON Pulse generation ( (Scheme 109)waveform 1) 9 (BSLC) - 23 (GND) Power source voltage Ignition switch ON 10 to 14 V If the result is not as specified, the 4WD control ECU may have a malfunction. Using an oscilloscope, check the waveform 1. WAVEFORM 1 (REFERENCE) Terminal Name Content Tester Range 5 V/DIV., 2 msec./DIV. Condition Engine stop, ignition switch ON

Scheme 110

Scheme 111

1. DESCRIPTION Active torque control 4WD system data can be read in the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs. Therefore when there seems to be a problem with the active torque control 4WD, use the Techstream or SST to check and troubleshoot it.
2. CHECK DLC3 The ECU uses CAN (ISO11898-1) and ISO9141-2 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO9141-2 format. Verify the conditions listed in the table below. Symbol (Terminal No.) Terminal Description Condition Specified Condition SIL (7) - SG (5) Bus + line During transmission Pulse generation CG (4) - Body Ground Chassis ground Always Below 1 ohms SG (5) - Body Ground Signal ground Always Below 1 ohms BAT (16) - Body Ground Battery positive Always 10 to 14 V CANH (6) - CANL (14) CAN bus line Ignition switch off* 54 to 69 ohms CANH (6) - CG (4) HIGH-level CAN bus line Ignition switch off* 200 ohms or higher CANL (14) - CG (4) LOW-level CAN bus line Ignition switch off* 200 ohms or higher CANH (6) - BAT (16) HIGH-level CAN bus line Ignition switch off* 6 kohms or higher CANL (14) - BAT (16) LOW-level CAN bus line Ignition switch off* 6 kohms or higher NOTE: *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, other switches or the doors. If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector. HINT: Connect the cable of the Techstream to the DLC3, turn the ignition switch to ON and attempt to use the Techstream. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the Techstream. If communication is normal when the Techstream is connected to another vehicle, inspect the DLC3 of the original vehicle. If communication is still not possible when the Techstream is connected to another vehicle, the problem may be in the Techstream itself. Consult the Service Department listed in the Techstream instruction manual.
3. WARNING LIGHT When a problem occurs in the active torque control 4WD system, the 4WD warning light on the combination meter comes on to inform the driver of the problem.

Scheme 112

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1. CHECK DTC (When Using Techstream) Check the DTCs. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Read the DTCs following the prompts on the Techstream screen. Enter the following menus: Chassis / 4WD / Trouble Codes. Check the details of the DTCs. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-427522-S01026462682011101200000) .
2. CLEAR DTC (When Using Techstream) Clear the DTCs. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Operate the Techstream to clear the codes. Enter the following menus: Chassis / 4WD / Trouble Codes. According to the display on the Techstream, select the trouble code data display with the clear button.
3. CHECK DTC (When not Using Techstream) Check the DTCs. Using SST, connect terminals TC (13) and CG (4) of the DLC3. SST: 09843-18040 Turn the ignition switch to ON. Read DTCs from the 4WD warning light on the combination meter. HINT: If the 4WD warning light does not blink, perform relevant troubleshooting procedures. The relevant troubleshooting procedures are in the information listed in the table below. If more than 1 DTC is detected at the same time, the DTCs will be displayed in numerical order. As an example, the blinking patterns of the normal system code and DTCs 11 and 21 are shown below. DTCs are explained in Diagnostic Trouble Code Chart. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-427522-S01026462682011101200000) . Title See Procedure 4WD Warning Light does not Come ON Refer to «4WD Warning Light does not Come ON»(ref-427523-S13057267712011101200000) TC and CG Terminal Circuit Refer to «TC and CG Terminal Circuit»(ref-427523-S04299705002011101200000)
4. CLEAR DTC (When not Using Techstream) Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3. SST: 09843-18040 Turn the ignition switch to ON. Clear the DTCs stored in the 4WD control ECU by depressing the brake pedal 8 times or more within 5 seconds. Check that the warning light blinks in the normal system code pattern. Remove SST from the terminals of the DLC3. Turn the ignition switch off. HINT: DTCs cannot be cleared by disconnecting the cable from the negative (-) battery terminal or removing the ECU-IG1 fuse.

DATA LIST / ACTIVE TEST

1. DATA LIST HINT: Using the Techstream Data List allows sensor and other item values to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time. Warm up the engine. 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 / 4WD / Data List. According to the display on the Techstream, read the Data List. 4WD CONTROL ECU Tester Display Measurement Item/Range Normal Condition Diagnostic Note 4WD WARN LIGHT 4WD warning light /OFF or ON OFF: 4WD warning light OFF ON: 4WD warning light ON - STOP LIGHT SW Stop light switch /OFF or ON OFF: Brake pedal released ON: Brake pedal depressed - FR WHEEL SPD FR wheel speed / Min.: 0 km/h (0 mph) Reading : Max.: 326.4 km/h (202.8 mph) Actual wheel speed Almost no difference from the speedometer FL WHEEL SPD FL wheel speed / Min.: 0 km/h (0 mph) Reading : Max.: 326.4 km/h (202.8 mph) Actual wheel speed Almost no difference from the speedometer RR WHEEL SPD RR wheel speed / Min.: 0 km/h (0 mph) Reading : Max.: 326.4 km/h (202.8 mph) Actual wheel speed Almost no difference from the speedometer RLWHEEL SPD RL wheel speed / Min.: 0 km/h (0 mph) Reading : Max.: 326.4 km/h (202.8 mph) Actual wheel speed Almost no difference from the speedometer SLC CUR SLC solenoid (4WD linear solenoid) current / Min.: 0 A Max.: 3 A Min.: 0 A Max.: 3 A - Forward and Rearward G Forward and Rearward G / Min.: -25.10 m/s 2 Max.: 24.90 m/s 2 Approximately 0 +/-0.13 while stationary
2. ACTIVE TEST HINT: Performing the Techstream Active Test allows switch and other items to be operated without removing any parts. Performing the Active Test early in troubleshooting is one way to save time. The Data List can be displayed during the Active Test. Warm up the engine. 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 / 4WD / Active Test. According to the display on the Techstream, perform the Active Test. CHASSIS / 4WD / ACTIVE TEST Tester Display Test Part Control Range Diagnostic Note 4WD Light 4WD Warning Light Warning light is ON/OFF Observer combination meter

DIAGNOSTIC TROUBLE CODE CHART

ACTIVE TORQUE CONTROL 4WD SYSTEM