Pre-Collision System [diagnostics - Introduction] Toyota Prius V I

PRECAUTION

1. NOTICE FOR INITIALIZATION NOTE: When disconnecting the cable from the negative (-) auxiliary battery terminal, initialize the following systems after the cable is reconnected. System Name See Procedure Advanced Parking Guidance System Refer to «INITIALIZATION»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction__initialization) Power Door Lock Control System
2. TROUBLESHOOTING PRECAUTIONS If a terminal contact point malfunction or part installation problem occurs, removal and reinstallation of the suspected part may return the system to normal. However, be aware that the normal condition may only be temporary. Before disconnecting connectors or removing/installing parts, determine the malfunctioning area by checking and writing down the vehicle condition at the time the malfunction occurred (DTC outputs etc.). Be sure to check for DTCs related to other systems. The pre-collision system may be influenced by malfunctions in other systems.
3. HANDLING PRECAUTIONS When removing and installing the ECU, sensor, switch or other pre-collision system related parts, perform the following: Make sure that the power switch is off unless otherwise specified in the inspection procedure. After the removal/installation, check for DTCs and confirm that a normal system code is output.

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COMMUNICATION TABLE

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1. PRE-COLLISION SYSTEM The pre-collision system optimizes and activates occupant protection equipment (see below) to attempt to reduce damage due to a collision.
2. OUTLINE OF PRE-COLLISION SYSTEM Operating Condition Control Transmitting ECU Receiving ECU Part Operated Operates according to sensor detection Pre-collision seat belt Driving Support ECU Assembly Seat belt control ECU Front seat outer belts Operates according to sensor detection Pre-collision brake assist Driving Support ECU Assembly Brake booster with master cylinder (skid control ECU) Brake assist system Operates when sudden braking or sideways slippage occurs Pre-collision seat belt Brake booster with master cylinder (skid control ECU) Seat belt control ECU Front seat outer belts Operates according to sensor detection Pre-collision brake Driving Support ECU Assembly Brake booster with master cylinder (skid control ECU) Brake system When operating according to sensor detection: The millimeter wave radar sensor detects vehicles and other objects on the road in front of the user's vehicle. The Driving Support ECU Assembly determines if a collision is unavoidable based on object position, speed and track information. If the Driving Support ECU Assembly determines that a collision is unavoidable, it transmits this information to the following areas using CAN communication: Seat belt control ECU (initiates control of pre-collision seat belts) Brake booster with master cylinder (skid control ECU) (activates pre-collision brake assist system) Brake booster with master cylinder (skid control ECU) (activates pre-collision brake) When operating as a result of sudden braking: The brake booster with master cylinder (skid control ECU) uses brake pressure information and other data to determine if the driver has suddenly applied the brakes. If so, the brake booster with master cylinder (skid control ECU) sends a signal to the seat belt control ECU through CAN communication and the pre-collision seat belts operate.
3. OUTLINE OF PRE-COLLISION SEAT BELT CONTROL The pre-collision seat belts operate depending on what the sensor detects, or whether sudden braking has occurred. The pre-collision seat belt motor retracts the seat belt to enhance pretensioner effectiveness. Operating condition Refer to the sensor and sudden braking descriptions under "Outline of Pre-Collision System" (see above).
4. OUTLINE OF PRE-COLLISION BRAKE ASSIST CONTROL The pre-collision brake assist operates depending on what the sensor detects. The system then enters standby mode before a collision. When the driver depresses the brake pedal, brake fluid pressure is increased to improve fluid pressure response and improve the rate of deceleration. Operative condition Refer to the sensor description under "Outline of Pre-Collision System" (see above). When the driver depresses the brake pedal after the Driving Support ECU Assembly determines that a collision is high possibility: Brake fluid pressure is increased at the same time the driver depresses the brake pedal. When the driver depresses the brake pedal before the Driving Support ECU Assembly determines that a collision is unavoidable: Brake fluid pressure is increased at the same time that the Driving Support ECU Assembly receives a pre-collision sensor signal (indicating that other vehicles or objects are in front of the vehicle).
5. OUTLINE OF PRE-COLLISION BRAKE CONTROL The pre-collision brake operation is performed depending on what the sensor detects. This system can be canceled by the pre-collision system cancel switch assembly. HINT: While the pre-collision brake operation is canceled, the PCS indicator light on the combination meter turns on. Operating condition Refer to the sensor description under "Outline of Pre-Collision System" (see above). When the driving support ECU assembly determines that a collision is unavoidable, the system performs brake control (pre-collision brake operation) to reduce the vehicle speed.
6. OPERATIVE CONDITION AND INOPERATIVE CONDITION OF EACH CONTROL (REVIEW) HINT: Each function will operate when all items marked (o) are satisfied. Pre-Collision Seat Belt*1 Pre-Collision Seat Belt*2 Pre-Collision Brake Assist*2 Pre-Collision Brake*2 When power switch is on (IG) o o o o No problem in related components. Refer to «PROBLEM SYMPTOMS TABLE»(/toyota/prius-v/i-2011-2014/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction__problem-symptoms-table) o o o o When front seat belt(s) is/are fastened o o - - Operates when the vehicle speed is 30 km/h (19 mph) or more, regardless of relative speed o - - - Operates when the vehicle speed is 5 km/h (4 mph) or more and relative speed is 30 km/h (19 mph) or more - o - - Operates when the vehicle speed is 15 km/h (10 mph) or more and relative speed is 15 km/h (10 mph) or more - - - o Operates when the vehicle speed is 30 km/h (19 mph) or more and relative speed is 30 km/h (19 mph) or more - - o - When pre-collision brake operation has not been disabled using the pre-collision system cancel switch assembly - - - o When the brake pedal is depressed - - o - *1: Operates when sudden braking or skidding is detected. *2: Does not operate in the following situations. When the vehicle collides with an object outside the detection range of the millimeter wave radar sensor (side collision, rear collision, etc.) When the millimeter wave radar sensor cannot detect a possible collision object o: Main basis for operation -: Not main basis for operation
7. CASES OF UNNECESSARY PRE-COLLISION SYSTEM OPERATION When the millimeter wave radar sensor detects an object in front of the vehicle under the conditions described below, the Driving Support ECU Assembly may determine that a collision is unavoidable, and activate the pre-collision system. This activation of the system is not abnormal. HINT: The pre-collision system will not activate when approaching safety cones or other plastic objects as they cannot be detected by the pre-collision sensor. The pre-collision system may or may not activate when the pre-collision sensor detects the following objects: people, bicycles, motorcycles, trees, animals and snow fences. Detection performance may deteriorate in the following conditions. Vehicle height changes signifiicantly (front of vehicle inclined either upward or downward) Millimeter wave radar sensor is misaligned (due to reinstallation or collision) Object Type Example Objects that cannot be detected Plastic items (safety cones) Objects that cannot be detected in a stable manner People, bicycles, motorcycles, trees, animals, snow fences, etc.

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. Use the following procedure to troubleshoot the pre-collision system.
2. The Techstream should be used in steps 3, 4 and 6.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. INSPECT AUXILIARY BATTERY VOLTAGE Measure the auxiliary battery voltage with the power switch off. Standard voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step. NG --> CHARGE OR REPLACE AUXILIARY BATTERY OK: Go to next step
3. CHECK CAN COMMUNICATION SYSTEM Use the Techstream to check if the CAN communication system is functioning normally. Refer to «SYSTEM DIAGRAM»(/toyota/prius-v/i-2011-2014/remont/communication-devices/#can-communication-system-diagnostics-introduction) . Result DTC Condition Proceed to CAN DTC is not output A CAN DTC is output B B --> GO TO CAN COMMUNICATION SYSTEM. Refer to «SYSTEM DIAGRAM»(/toyota/prius-v/i-2011-2014/remont/communication-devices/#can-communication-system-diagnostics-introduction) A: Go to next step
4. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction__dtc-check-clear) . Record the DTCs. Clear the DTCs. Recheck for DTCs. Attempt to duplicate the malfunction and check if the DTCs are output again. Refer to «DTC CHECK / CLEAR»(/toyota/prius-v/i-2011-2014/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction__dtc-check-clear) . Result DTC Condition Proceed to DTC is not output A DTC is output B No DTC is output, and malfunction cannot be duplicated or checked C B --> GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction__diagnostic-trouble-code-chart) C --> GO TO SYMPTOM SIMULATION. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) A: Go to next step
5. PROBLEM SYMPTOMS TABLE Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE»(/toyota/prius-v/i-2011-2014/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction__problem-symptoms-table) . Result Result Proceed to Fault is not listed in Problem Symptoms Table A Fault is listed in Problem Symptoms Table B B --> Go to step 7 A: Go to next step
6. OVERALL ANALYSIS AND TROUBLESHOOTING Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST»(/toyota/prius-v/i-2011-2014/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction__data-list-active-test) Terminals of ECU. Refer to «TERMINALS OF ECU»(/toyota/prius-v/i-2011-2014/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction) NEXT: Go to next step
7. ADJUST, REPAIR OR REPLACE NEXT: Go to next step
8. CONFIRMATION TEST NEXT --> END

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.

PRE-COLLISION SYSTEM

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1. CHECK SEAT BELT CONTROL ECU Disconnect the seat belt control ECU connectors. Measure the resistance and voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition L2-7 (+B) - Body ground P - Body ground Battery voltage Power switch off 11 to 14 V L2-8 (PGND) - Body ground W-B - Body ground Body ground Always Below 1 ohms L3-8 (IG1) - Body ground W - Body ground Seat belt control ECU power supply Power switch on (IG) 11 to 14 V Power switch off Below 1 V If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the connectors. Measure the voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition L2-2 (MOR+) - L2-1 (MOR-) LG - L Seat belt motor RH power supply Power switch on (IG) 4.0 to 8.5 V Power switch off Below 1 V L2-3 (MOL+) - L2-4 (MOL-) B - W Seat belt motor LH power supply Power switch on (IG) 4.0 to 8.5 V Power switch off Below 1 V If the result is not as specified, the ECU may be malfunctioning.
2. CHECK DRIVING SUPPORT ECU ASSEMBLY Disconnect the driving support ECU assembly connector. Measure the resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition L60-5 (PBSW) - Body ground L - Body ground Pre-collision brake cancel switch Pre-collision brake cancel switch assembly on Below 1 ohms Pre-collision brake cancel switch assembly off 10 kohms or higher L60-23 (CCS) - L60-25 (GND) V - W-B Cruise control main switch signal Power switch on (IG) 1 Mohms or higher L60-23 (CCS) - L60-25 (GND) V - W-B Cruise control main switch signal Power switch on (IG), CANCEL switch on 1509 to 1571 ohms L60-23 (CCS) - L60-25 (GND) V - W-B Cruise control main switch signal Power switch on (IG), -/SET switch on 617 to 643 ohms L60-23 (CCS) - L60-25 (GND) V - W-B Cruise control main switch signal Power switch on (IG), +/RES switch on 235 to 245 ohms L60-23 (CCS) - L60-25 (GND) V - W-B Cruise control main switch signal Power switch on (IG), Main switch on Below 2.5 ohms L60-25 (GND) - Body ground W-B - Body ground Body ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the connector. Measure the voltage according to the value(s) in the table below. Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition L60-7 (MODE) - Body ground R - Body ground MODE signal Power switch on (IG) MODE switch off 11 to 14 V Power switch on (IG) MODE switch on Below 2 V L60-16 (LRDD) - Body ground V - Body ground Driving support ECU assembly communication signal Power switch on (IG) Pulse generation (See waveform 2 (Scheme 55) ) L60-17 (CA2L) - L60-25 (GND) R - W-B CAN communication signal Power switch on (IG) Pulse generation (See waveform 1 (Scheme 54) ) L60-38 (LRRD) - Body ground L - Body ground Driving support ECU assembly communication signal Power switch on (IG) Pulse generation (See waveform 3 (Scheme 56) ) L60-39 (CA2H) - L60-25 (GND) B - W-B CAN communication signal Power switch on (IG) Pulse generation (See waveform 4 (Scheme 57) ) Waveform 1 CAN communication signal Item Content Driving Support ECU Assembly Terminal Name Between CA2L and GND Tester Range 1 V/DIV., 10 μsec./DIV. Condition Power switch on (IG) HINT: The waveform varies depending on the CAN communication signal. Waveform 2 Item Content Driving Support ECU Assembly Terminal Name Between LRDD and GND Tester Range 2 V/DIV., 10 μsec./DIV. Condition Power switch on (IG) Waveform 3 Item Content Driving Support ECU Assembly Terminal Name Between LRRD and GND Tester Range 2 V/DIV., 10 μsec./DIV. Condition Power switch on (IG) Waveform 4 CAN communication signal Item Content Driving Support ECU Assembly Terminal Name Between CA2H and GND Tester Range 1 V/DIV., 10 μsec./DIV. Condition Power switch on (IG) HINT: The waveform varies depending on the CAN communication signal.

DIAGNOSIS SYSTEM

1. CHECK DLC3 Check the DLC3. Refer to «GENERAL INFORMATION»(/toyota/prius-v/i-2011-2014/remont/hoistjack/#introduction) .
2. FUNCTION OF WARNING INDICATOR If the pre-collision system is not functioning properly, the driver is warned by the PCS warning indicator on the combination meter. PCS Warning Indicator Detail DTC Blinking This PCS warning indicator appears when the seat belt control ECU and driving support ECU assembly detects a system malfunction o On This PCS warning indicator appears when the seat belt control ECU is in fail-safe mode. Refer to «FAIL-SAFE CHART»(/toyota/prius-v/i-2011-2014/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction__fail-safe-chart) - Initial check The initial check occurs when the power switch is off for more than 2 seconds, and then turned on (IG). The initial check consists of a pre-collision system diagnostic check with a duration of approximately 3 seconds. If a malfunction is detected during the initial check, PCS warning indicator is lights in the combination meter assembly. Constant check The seat belt control ECU and driving support ECU assembly constantly monitor the pre-collision system for malfunctions after the power switch is turned on (IG) and initial check (approximately 3 seconds) is completed. The PCS warning indicator blinking, when the constant check detects malfunctions in the pre-collision system.

DTC CHECK / CLEAR

1. CHECK DTC Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Pre-Collision / Trouble Codes. Enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Check the details of the DTC(s). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-v/i-2011-2014/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction__diagnostic-trouble-code-chart) . HINT: As the driving support ECU assembly and seat belt control ECU output DTCs for the pre-collision system, be sure to check the Pre-Collision and Pre-Collision 2 DTCs.
2. CLEAR DTC Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Pre-Collision / Trouble Codes. Enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs. HINT: As the driving support ECU assembly and seat belt control ECU output DTCs for the pre-collision system, be sure to clear the Pre-Collision and Pre-Collision 2 DTCs.

FAIL-SAFE CHART

HINT

The pre-collision system fail-safe function and details are indicated in the table below.

*1: The overheating prevention function operates when the seat belt control ECU detects a rise in seat belt temperature because of excessive seat belt operation.

*2: The pre-collision seat belts operate when sudden braking is detected. The pre-collision seat belts operate when skidding is detected.

DATA LIST / ACTIVE TEST

1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items 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. NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: for Pre-Collision: Body Electrical / Pre-Collision / Data List. for Pre-Collision 2: Body Electrical / Pre-Collision 2 / Data List. Read the Data List according to the display on the Techstream. HINT: As the driving support ECU and seat belt control ECU both have Data List for the pre-collision system, be sure to check the Pre-Collision and Pre-Collision 2 Data Lists. PRE-COLLISION Tester Display Measurement Item/Range Normal Condition Diagnostic Note Driver Buckle SW Buckle switch status of driver side seat/ UNKNOWN, UNSET, SET or ERROR UNKNOWN: Indeterminate data UNSET: Driver seat belt unfastened SET: Driver seat belt fastened ERROR: Buckle switch trouble - Passenger Buckle SW Buckle switch status of passenger side seat/ UNKNOWN, UNSET, SET or ERROR UNKNOWN: Indeterminate data UNSET: Driver seat belt unfastened SET: Driver seat belt fastened ERROR: Buckle switch trouble - Driver Belt Control Seat belt control status of driver side seat/ UNSPPRT, STOP, ON or UNKNOWN UNSPPRT: Seat belt control unsupported STOP: Control stopped ON: Controlled UNKNOWN: Indeterminate data Seat belt (driver side) is fastened Passenger Belt Control Seat belt control status of passenger side seat/ UNSPPRT, STOP, ON or UNKNOWN UNSPPRT: Seat belt control unsupported STOP: Control stopped ON: Controlled UNKNOWN: Indeterminate data Seat belt (passenger side) is fastened Number of Trouble Code Number of past trouble codes/min: 0, max: 255 Number of DTCs will be displayed - PRE-COLLISION 2 Tester Display Measurement Item/Range Normal Condition Diagnostic Note Wiper Information Wiper operational status/ Unoperat, Oil off, Mist, Washer, Unknown, Intermi, Lo, Hi The respective operational status displayed - Pre-Collision Brake OFF Switch Pre-collision system cancel switch assembly status/ ON or OFF ON: Pre-collision system cancel switch assembly on OFF: Pre-collision system cancel switch assembly off - Pre-Collision System Pre-collision system control/ Valid or Inval Valid: Pre-collision system control possible Inval: Pre-collision system control not possible - DCam Indicator Driver camera indicator display request signal/ ON or OFF ON: Driver camera indicator display requested OFF: Driver camera indicator display not requested Not Supported PCS Indicator "CHECK PCS SYSTEM" display request signal/ ON or OFF ON: "CHECK PCS SYSTEM" display requested OFF: "CHECK PCS SYSTEM" display not requested - PCS Disabled Indicator "PCS TEMPORARILY NOT AVAILABLE" display request signal/ ON or OFF ON: "PCS TEMPORARILY NOT AVAILABLE" display requested OFF: "PCS TEMPORARILY NOT AVAILABLE" display not requested - Pre-Collision Safety Warning Ind PCS system warning status/ ON or OFF ON: Pre-collision warning indicator on OFF: Pre-collision warning indicator off - Pre-Collision Safety Brake Ind PCS system "BRAKE!" alert status/ ON or OFF ON: PCS system "BRAKE!" alert on OFF: PCS system "BRAKE!" alert off - Pre-Collision Safety Warning Buz PCS system warning buzzer/ Valid or Inval Valid: PCS system warning buzzer operation possible Inval: PCS system warning buzzer operation not possible - Pre-Collision Brake Pre-collision brake function/ Valid or Inval Valid: Pre-collision brake operation possible Inval: Pre-collision brake operation not possible - Front Radar PSB Front radar-linked pre-collision seat belt activation signal/ ON or OFF ON: Front radar-linked pre-collision seat belt activated OFF: Front radar-linked pre-collision seat belt not activated Status changes when the pre-collision seat belt is activated before a collision PBA Start Pre-collision brake assist activation signal/ ON or OFF ON: Pre-collision brake assist activated OFF: Pre-collision brake assist not activated Signal status changes when the pre-collision brake assist is activated before a collision (Pre-collision brake will activate only in situations where the driver depresses the brake pedal) Warning Brake Warning brake activation/ ON or OFF ON: Warning brake operation activated OFF: Warning brake operation not activated Not Supported Brake Assist Standby Supplemental brake pressure signal/ ON or OFF ON: Supplemental brake pressure being provided OFF: Supplemental brake pressure not being provided Signal status changes when supplemental brake pressure is being provided after a collision is judged as unavoidable and before the brake pedal is depressed Pre-Collision Brake Control Pre-collision brake operational status/ ON or OFF ON: Pre-collision brake operating OFF: Pre-collision brake function not operating Status changes when pre-collision brake operates before a collision AVS Start AVS control activation status/ ON or OFF ON: AVS control activated OFF: AVS control not activated Status changes when the suspension is controlled (stiffened) prior to a collision CCS Cancel Automatic cancellation of cruise control during pre-collision brake activation/ ON or OFF ON: Cruise control automatically canceled OFF: Cruise control not automatically canceled - Front Radar-Dirt History Millimeter wave radar sensor assembly dirt history/ ON or OFF ON: History of excessive dirt OFF: No history of excessive dirt - Front Radar-Environment Hist Millimeter wave radar sensor temperature condition history/ Good or Bad Good: No history of excessive temperature Bad: History of excessive temperature - Curr Com PCS-WIL-R Driver seat active headrest ECU connection status/ without or with with: Driver seat active headrest ECU connected without: Driver seat active headrest ECU not connected Not Supported Curr Com PCS-WIL-L Front passenger seat active headrest ECU connection status/ without or with with: Front passenger seat active headrest ECU connected without: Front passenger seat active headrest ECU not connected Not Supported Curr Com Night View ECU Night view ECU connection status/ without or with with: Night view ECU connected without: Night view ECU not connected Not Supported Country# (DSS) Destination country for driving support computer/ JPN, NA, EURO, AUS, SAFC, OTHER, TWN, CHINA, THAI, GCC, NOFIX Actual country code - The Number of DTCs Number of DTCs/ 0 to 255 When system is normal: 0 When a malfunction is detected: More than 0
2. ACTIVE TEST HINT: Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Pre-Collision / Active Test. Enter the following menus: for Pre-Collision: Body Electrical / Pre-Collision / Active Test. for ABS/VSC/TRAC: Chassis / ABS/VSC/TRAC / Active Test. for Main Body: Body Electrical / Main Body / Active Test. Perform Active Test according to the display on the Techstream. HINT: The power switch must be turned on (IG) to proceed with the Active Test using the Techstream. PRE-COLLISION Tester Display Test Part Control Range Diagnostic Note Driver Seat Belt Motor Driver seat belt motor ON: Seat belt motor operates OFF: Seat belt motor does not operate Seat belt (driver side) is fastened Passenger Seat Belt Motor Passenger seat belt motor ON: Seat belt motor operates OFF: Seat belt motor does not operate Seat belt (front passenger side) is fastened Driver and Passenger Seat Belt Motor Driver and passenger seat belt motors ON: Seat belt motors operate OFF: Seat belt motors do not operate Seat belts (driver and front passenger sides) are fastened NOTE: The seat belt motor will only operate when the tongue plate is inserted into the buckle (seat belt fastened). To prevent overheating the belt motor, this test cannot be activated continuously. Operate the belt motor at an interval of 30 seconds or more. ABS/VSC/TRAC Tester Display Test Part Control Range Diagnostic Note DSS Signal Buzzer Skid control buzzer Buzzer ON/OFF Buzzer can be heard MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note IG SW Power switch IG signal/ON or OFF ON: Power switch on (IG) OFF: Power switch off

DIAGNOSTIC TROUBLE CODE CHART

PRE-COLLISION SYSTEM

See also:
• INITIALIZATION
• SYSTEM DIAGRAM
• HOW TO PROCEED WITH TROUBLESHOOTING
• Power Source Circuit
• HOW TO PROCEED WITH TROUBLESHOOTING
• REMOVAL
• REMOVAL
• REMOVAL
• REMOVAL
• DATA LIST / ACTIVE TEST
• DISASSEMBLY
• PROBLEM SYMPTOMS TABLE
• DTC CHECK / CLEAR
• DIAGNOSTIC TROUBLE CODE CHART
• DATA LIST / ACTIVE TEST
• TERMINALS OF ECU
• FAIL-SAFE CHART