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Pre-Collision System (Diagnostic Codes & Circuit Tests): Other Lexus IS III

Airbag 5 illustrations ~7396 words

VEHICLE CONTROL HISTORY [04/2013 - ]

  1. VEHICLE CONTROL HISTORY HINT: A part of the control history can be confirmed using the vehicle control history. Refer to «VEHICLE CONTROL HISTORY [04/2013 - ]»(ref-665733-S17305890242014102400000)

CAUTION / NOTICE / HINT

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

Scheme 22

Scheme 22: PROCEDURE
Scheme 22: PROCEDURE

Scheme 23

Scheme 23
Scheme 23
  1. CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU ASSEMBLY - MILLIMETER WAVE RADAR SENSOR ASSEMBLY) Disconnect the M1 driving support ECU assembly connector. Disconnect the B8 millimeter wave radar sensor assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition M1-40 (CA1P) - B8-3 (CA1P) Always Below 1 ohms M1-18 (CA1N) - B8-2 (CA1N) Always Below 1 ohms M1-40 (CA1P) or B8-3 (CA1P) - Body ground Always 10 kohms or higher M1-18 (CA1N) or B8-2 (CA1N) - 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 2
  2. CHECK TERMINAL VOLTAGE (POWER SOURCE OF DRIVING SUPPORT ECU ASSEMBLY) Disconnect the M1 driving support ECU assembly connector. *a Front view of wire harness connector (to Driving Support ECU Assembly) Measure the voltage and resistance according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition M1-30 (B) - Body ground Engine switch on (IG) 11 to 14 V M1-30 (B) - Body ground Engine switch off Below 1 V Standard Resistance Tester Connection Condition Specified Condition M1-25 (GND) - Body ground Always Below 1 ohms Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR (DRIVING SUPPORT ECU ASSEMBLY - BATTERY AND BODY GROUND) Result: 3 OK See step 3
  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF MILLIMETER WAVE RADAR SENSOR ASSEMBLY) Disconnect the B8 millimeter wave radar sensor assembly connector. *a Front view of wire harness connector (to Millimeter Wave radar sensor assembly) Measure the voltage and resistance according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition B8-5 (IGB) - Body ground Engine switch on (IG) 11 to 14 V B8-5 (IGB) - Body ground Engine switch off Below 1 V Standard Resistance Tester Connection Condition Specified Condition B8-1 (SGND) - Body ground Always Below 1 ohms Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - BATTERY AND BODY GROUND) Result: 1 OK See step 4
  4. REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY Replace the millimeter wave radar sensor assembly with a new one. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S24004513992014102400000) Perform millimeter wave radar sensor assembly adjustment. Refer to «ADJUSTMENT [04/2013 - ]»(ref-665556-S25139163572014102400000) Result Proceed to NEXT Result: 1 NEXT See step 5
  5. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. Result Result Proceed to DTC U0235 and U1104 are not output A DTC U0235 or U1104 is output B Result: 1 A END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) Result: 2 B REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S04305393192014102400000)

PROCEDURE

  1. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes Result Result Proceed to CAN communication system DTCs are not output A CAN communication system DTCs are output B Result: 1 A USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665529-S21853141262014102400000) Result: 2 B GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665785-S15342612202014102400000)
  1. CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665532-S37150082782014102400000) Chassis > ABS/VSC/TRAC > Trouble Codes Result Result Proceed to Vehicle stability control system DTCs are not output A Vehicle stability control system DTCs are output B Result: 2 B GO TO VEHICLE STABILITY CONTROL SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART [04/2013 - ]»(ref-665532-S42482876212014102400000) Result: 1 A See step 2
  2. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. Result Result Proceed to DTC C1A50 is not output A DTC C1A50 is output B Result: 1 A USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665529-S21853141262014102400000) Result: 2 B REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S04305393192014102400000)

Note. Inspect the fuses for circuits related to this system before performing the following procedure. When this DTC is output, a malfunction in the lighting system is suspected. Check if the lighting system is functioning normally. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]

Scheme 24

Scheme 24: PROCEDURE
Scheme 24: PROCEDURE

Scheme 25

Scheme 25
Scheme 25
  1. CHECK STOP LIGHT OPERATION Check that the stop lights come on when the brake pedal is depressed and go off when the brake pedal is released. OK Condition Illumination Condition Brake pedal depressed On Brake pedal released Off Result Proceed to OK NG Result: 2 NG GO TO LIGHTING SYSTEM. Refer to «PROBLEM SYMPTOMS TABLE [04/2013 - ]»(ref-665551-S21406007702014102400000) Result: 1 OK See step 2
  2. CHECK TERMINAL VOLTAGE (POWER SOURCE OF SEMICONDUCTOR PWR INTEGRATION ECU) Turn the engine switch off. Disconnect the 2B semiconductor PWR integration ECU connector. *a Front view of wire harness connector (to Semiconductor PWR Integration ECU) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition 2B-1 (BATT) - Body ground Always 11 to 14 V Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 3
  3. CHECK HARNESS AND CONNECTOR (SEMICONDUCTOR PWR INTEGRATION ECU - BODY GROUND) Turn the engine switch off. Disconnect the 2D and 2G semiconductor PWR integration ECU connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2D-14 - Body ground Always Below 1 ohms 2G-5 - Body ground Always Below 1 ohms Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 4
  4. CHECK TERMINAL VOLTAGE (STP TERMINAL) Turn the engine switch off. Disconnect the A15 skid control ECU (brake actuator assembly) connector. *a Front view of wire harness connector (to Skid Control ECU [Brake Actuator Assembly]) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A15-2 (STP) - Body ground Brake pedal depressed 11 to 14 V A15-2 (STP) - Body ground Brake pedal released Below 1.5 V Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 5
  5. CHECK TERMINAL VOLTAGE (STP TERMINAL) Turn the engine switch off. Disconnect the 2D semiconductor PWR integration ECU connector. *a Front view of wire harness connector (to Semiconductor PWR Integration ECU) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition 2D-10 (STP) - Body ground Brake pedal depressed 11 to 14 V 2D-10 (STP) - Body ground Brake pedal released Below 1.5 V Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 6
  6. PERFORM ACTIVE TEST USING TECHSTREAM (STOP LIGHT RELAY) Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test. Perform "Active Test" according to the display on Techstream. Chassis > ABS/VSC/TRAC > Active Test Tester Display Measurement Item Control Range Diagnostic Note Stop Light Relay Stop light control relay (STOP LP) ON or OFF Stop lights come on Chassis > ABS/VSC/TRAC > Active Test Tester Display Stop Light Relay Enter the following menus: Chassis / ABS/VSC/TRAC / Data List. Check the stop light switch assembly (stop light control relay) operation using the Data List and stop light operation by performing an Active Test. Chassis > ABS/VSC/TRAC > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note Stop Light Relay Output Stop light control relay (STOP LP) output ON or OFF ON: Relay output on (Stop light on) OFF: Relay output off (Stop light off) - Chassis > ABS/VSC/TRAC > Data List Tester Display Stop Light Relay Output Result Result Proceed to Data List item changes between ON and OFF, but stop lights do not turn on A Data List item changes between ON and OFF and stop lights turn on and off B Result: 2 B See step 8 Result: 1 A See step 7
  7. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY [SKID CONTROL ECU] - SEMICONDUCTOR PWR INTEGRATION ECU) Turn the engine switch off. Disconnect the A15 skid control ECU (brake actuator assembly) connector. Disconnect the 2D semiconductor PWR integration ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A15-31 (STPO) - 2D-3 (ACC) Always Below 1 ohms A15-31 (STPO) or 2D-3 (ACC) - 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 8
  8. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY [SKID CONTROL ECU] - SEMICONDUCTOR PWR INTEGRATION ECU) Turn the engine switch off. Disconnect the A15 skid control ECU (brake actuator assembly) connector. Disconnect the 2F semiconductor PWR integration ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A15-22 (STP2) - 2F-9 (OUT) Always Below 1 ohms Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 9
  9. CHECK TERMINAL VOLTAGE (STP2 TERMINAL) Turn the engine switch off. Disconnect the A15 skid control ECU (brake actuator assembly) connector. *a Front view of wire harness connector (to Skid Control ECU [Brake Actuator Assembly]) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A15-22 (STP2) - Body ground Brake pedal depressed 11 to 14 V A15-22 (STP2) - Body ground Brake pedal released Below 1.5 V Result Proceed to OK NG Result: 2 NG REPLACE SEMICONDUCTOR PWR INTEGRATION ECU. Refer to «REMOVAL [04/2013 - ]»(ref-665734-S38821131362014102400000) Result: 1 OK See step 10
  10. CHECK FOR DTCs (PRE-COLLISION 2) Turn the engine switch off and wait for at least 2 minutes. Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Using the GTS, perform the Active Test "Stop Light Relay" with the engine switch on (IG). Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. Result Result Proceed to DTC C1A4B is not output A DTC C1A4B is output B Result: 1 A END Result: 2 B REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S04305393192014102400000)

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

Scheme 26

Scheme 26: PROCEDURE
Scheme 26: PROCEDURE
  1. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes Result Result Proceed to DTC C1A4A and U0235 are not output A DTC C1A4A and U1104 are not output DTC C1A4A is output B DTC C1A4A and U0235 are output C DTC C1A4A and U1104 are output D Result: 1 A USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665529-S21853141262014102400000) Result: 3 C GO TO DTC U0235. Refer to «DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor; DTC U1104: Lost Communication with Driving Support ECU [04/2013 - ]»(ref-665858-S03432608772014102400000) Result: 4 D GO TO DTC U1104. Refer to «DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor; DTC U1104: Lost Communication with Driving Support ECU [04/2013 - ]»(ref-665858-S03432608772014102400000) Result: 2 B See step 2
  2. PERFORM ACTIVE TEST USING TECHSTREAM (SKID CONTROL BUZZER ASSEMBLY) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Pre-Collision 2 / Active Test. Perform "Active Test" according to the display on Techstream. Body Electrical > Pre-Collision 2 > Active Test Tester Display Measurement Item Control Range Diagnostic Note PCS Crash Alarm Buzzer Skid control buzzer assembly ON or OFF Buzzer can be heard PCS Approach Alarm Buzzer Skid control buzzer assembly ON or OFF Buzzer can be heard Body Electrical > Pre-Collision 2 > Active Test Tester Display PCS Crash Alarm Buzzer Body Electrical > Pre-Collision 2 > Active Test Tester Display PCS Approach Alarm Buzzer OK Skid control buzzer assembly sounds. NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. Result Proceed to OK NG Result: 1 OK REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S04305393192014102400000) Result: 2 NG See step 3
  3. INSPECT SKID CONTROL BUZZER ASSEMBLY Remove the skid control buzzer assembly. Refer to «REMOVAL [04/2013 - ]»(ref-665796-S28788283352014102400000) Inspect the skid control buzzer assembly. Refer to «INSPECTION [04/2013 - ]»(ref-665796-S20952563272014102400000) Result Proceed to OK NG Result: 2 NG REPLACE SKID CONTROL BUZZER ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665796-S28788283352014102400000) Result: 1 OK See step 4
  4. CHECK TERMINAL VOLTAGE (POWER SOURCE OF SKID CONTROL BUZZER ASSEMBLY) Disconnect the K41 skid control buzzer assembly connector. *a Front view of wire harness connector (to Skid Control Buzzer Assembly) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition K41-2 (IG1) - Body ground Engine switch on (IG) 11 to 14 V K41-2 (IG1) - Body ground Engine switch off Below 1 V Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL BUZZER ASSEMBLY - BATTERY) Result: 1 OK See step 5
  5. CHECK HARNESS AND CONNECTOR (SKID CONTROL BUZZER ASSEMBLY - MILLIMETER WAVE RADAR SENSOR ASSEMBLY) Disconnect the K41 skid control buzzer assembly connector. Disconnect the B8 millimeter wave radar sensor assembly connector. Disconnect the S9 lane departure warning camera connector (w/ Lane Departure Alert System). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition K41-1 (BZ) - B8-10 (BZ) Always Below 1 ohms K41-1 (BZ) or B8-10 (BZ) - 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 6
  6. REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY Replace the millimeter wave radar sensor assembly with a new one. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S24004513992014102400000) Perform millimeter wave radar sensor assembly adjustment. Refer to «ADJUSTMENT [04/2013 - ]»(ref-665556-S25139163572014102400000) Result Proceed to NEXT Result: 1 NEXT See step 7
  7. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. Result Result Proceed to DTC C1A4A is not output A DTC C1A4A is output B Result: 1 A END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) Result: 2 B REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S04305393192014102400000)
  1. CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665532-S37150082782014102400000) Chassis > ABS/VSC/TRAC > Trouble Codes Result Result Proceed to Vehicle stability control system DTCs are not output A Vehicle stability control system DTCs are output B Result: 2 B GO TO VEHICLE STABILITY CONTROL SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART [04/2013 - ]»(ref-665532-S42482876212014102400000) Result: 1 A See step 2
  2. REPLACE BRAKE ACTUATOR ASSEMBLY Replace the brake actuator assembly with a new one. Refer to «REMOVAL [04/2013 - ]»(ref-665739-S25338580192014102400000) Result Proceed to NEXT Result: 1 NEXT See step 3
  3. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. Result Result Proceed to DTC C1A47 is not output A DTC C1A47 is output B Result: 1 A END (BRAKE ACTUATOR ASSEMBLY WAS DEFECTIVE) Result: 2 B REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S04305393192014102400000)
  1. CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665532-S37150082782014102400000) Chassis > ABS/VSC/TRAC > Trouble Codes Result Result Proceed to Vehicle stability control system DTCs are not output A Vehicle stability control system DTCs are output B Result: 2 B GO TO VEHICLE STABILITY CONTROL SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART [04/2013 - ]»(ref-665532-S42482876212014102400000) Result: 1 A See step 2
  2. REPLACE BRAKE ACTUATOR ASSEMBLY Replace the brake actuator assembly with a new one. Refer to «REMOVAL [04/2013 - ]»(ref-665739-S25338580192014102400000) Result Proceed to NEXT Result: 1 NEXT See step 3
  3. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. Result Result Proceed to DTC C1A46 is not output A DTC C1A46 is output B Result: 1 A END (BRAKE ACTUATOR ASSEMBLY WAS DEFECTIVE) Result: 2 B REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S04305393192014102400000)
  1. CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665532-S37150082782014102400000) Chassis > ABS/VSC/TRAC > Trouble Codes Result Result Proceed to Vehicle stability control system DTCs are not output A Vehicle stability control system DTCs are output B Result: 2 B GO TO VEHICLE STABILITY CONTROL SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART [04/2013 - ]»(ref-665532-S42482876212014102400000) Result: 1 A See step 2
  2. CHECK FOR DTCs (SFI SYSTEM) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Check for DTCs. for 2GR-FSE: Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665553-S41857385812014102400000) for 4GR-FSE: Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665554-S38092923772014102400000) Powertrain > Engine > Trouble Codes Result Result Proceed to SFI system DTCs are not output A SFI system DTCs are output B Result: 2 B GO TO SFI SYSTEM for 2GR-FSE: Refer to «DIAGNOSTIC TROUBLE CODE CHART [04/2013 - ]»(ref-665553-S26084221922014102400000) for 4GR-FSE: Refer to «DIAGNOSTIC TROUBLE CODE CHART [04/2013 - ]»(ref-665554-S03150692352014102400000) Result: 1 A See step 3
  3. REPLACE ECM Replace the ECM with a new one. for 2GR-FSE: Refer to «REMOVAL [04/2013 - ]»(ref-665726-S01579686462014102400000) for 4GR-FSE: Refer to «REMOVAL [04/2013 - ]»(ref-665751-S41334133092014102400000) Result Proceed to NEXT Result: 1 NEXT See step 4
  4. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes Result Result Proceed to DTC C1A41 is output A DTC C1A41 is not output B Result: 2 B END (ECM WAS DEFECTIVE) Result: 1 A See step 5
  5. REPLACE BRAKE ACTUATOR ASSEMBLY Replace the brake actuator assembly with a new one. Refer to «REMOVAL [04/2013 - ]»(ref-665739-S25338580192014102400000) Result Proceed to NEXT Result: 1 NEXT See step 6
  6. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. Result Result Proceed to DTC C1A41 is not output A DTC C1A41 is output B Result: 1 A END (BRAKE ACTUATOR ASSEMBLY WAS DEFECTIVE) Result: 2 B REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S04305393192014102400000)
  1. CHECK FOR DTCs (SFI SYSTEM) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine / Trouble Codes. Check for DTCs. for 2GR-FSE: Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665553-S41857385812014102400000) for 4GR-FSE: Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665554-S38092923772014102400000) Powertrain > Engine > Trouble Codes Result Result Proceed to SFI system DTCs are not output A SFI system DTCs are output B Result: 2 B GO TO SFI SYSTEM for 2GR-FSE: Refer to «DIAGNOSTIC TROUBLE CODE CHART [04/2013 - ]»(ref-665553-S26084221922014102400000) for 4GR-FSE: Refer to «DIAGNOSTIC TROUBLE CODE CHART [04/2013 - ]»(ref-665554-S03150692352014102400000) Result: 1 A See step 2
  2. CHECK FOR DTCs (AUTOMATIC TRANSMISSION SYSTEM) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. for A760H/A960E: Enter the following menus: Powertrain / Engine / Trouble Codes. for AA81E: Enter the following menus: Powertrain / ECT / Trouble Codes. Check for DTCs. for A760H: Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665557-S13818722502014102400000) for A960E: Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665558-S01330360592014102400000) for AA81E: Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665559-S00102913942014102400000) Powertrain > Engine > Trouble Codes Powertrain > ECT > Trouble Codes Result Result Proceed to Automatic transmission system DTCs are not output A Automatic transmission system DTCs are output B Result: 2 B GO TO AUTOMATIC TRANSMISSION SYSTEM for A760H: Refer to «DIAGNOSTIC TROUBLE CODE CHART [04/2013 - ]»(ref-665557-S19164824052014102400000) for A960E: Refer to «DIAGNOSTIC TROUBLE CODE CHART [04/2013 - ]»(ref-665558-S03698756042014102400000) for AA81E: Refer to «DIAGNOSTIC TROUBLE CODE CHART [04/2013 - ]»(ref-665559-S34019724112014102400000) Result: 1 A See step 3
  3. REPLACE DRIVING SUPPORT ECU ASSEMBLY Replace the driving support ECU assembly. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S04305393192014102400000) NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. Result Proceed to NEXT Result: 1 NEXT See step 4
  4. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes Result Result Proceed to DTC C1A40 is not output A DTC C1A40 is output B Result: 1 A END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE) Result: 2 B REPLACE ECM for 2GR-FSE: Refer to «REMOVAL [04/2013 - ]»(ref-665726-S01579686462014102400000) for 4GR-FSE: Refer to «REMOVAL [04/2013 - ]»(ref-665751-S41334133092014102400000)

Note. When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed. Refer to ADJUSTMENT [04/2013 - ]

  1. ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY Check that the bracket of the millimeter wave radar sensor assembly is not deformed. HINT: If the bracket is deformed, replace the millimeter wave radar sensor assembly. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S24004513992014102400000) Perform millimeter wave radar sensor assembly adjustment. Refer to «ADJUSTMENT [04/2013 - ]»(ref-665556-S25139163572014102400000) Result Proceed to NEXT Result: 1 NEXT See step 2
  2. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. Result Result Proceed to DTC C1A11 and C1A14 are not output A DTC C1A11 or C1A14 is output B Result: 1 A END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) Result: 2 B REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S04305393192014102400000)

Note. When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed. Refer to ADJUSTMENT [04/2013 - ]

  1. REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY Replace the millimeter wave radar sensor assembly with a new one. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S24004513992014102400000) Perform millimeter wave radar sensor assembly adjustment. Refer to «ADJUSTMENT [04/2013 - ]»(ref-665556-S25139163572014102400000) Result Proceed to NEXT Result: 1 NEXT See step 2
  2. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. Result Result Proceed to DTC C1A10 is not output A DTC C1A10 is output B Result: 1 A END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) Result: 2 B REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S04305393192014102400000)

Note. Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU). If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Refer to REGISTRATION [04/2013 - ] When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed. Refer to ADJUSTMENT [04/2013 - ]

  1. READ VALUE USING TECHSTREAM (COUNTRY# (F RADAR SENS)) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Radar Cruise / Data List. Read the Data List according to the display on the Techstream. Powertrain > Radar Cruise > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note Country# (F Radar Sens) Destination country for millimeter wave radar sensor assembly JPN, NA, EURO, AUS, SAFC, OTHER, TWN, CHINA, THAI, GCC or NOFIX Actual country code - Powertrain > Radar Cruise > Data List Tester Display Country# (F Radar Sens) Result Result Proceed to Country specification information for vehicle and millimeter wave radar sensor assembly match A Country specification information for vehicle and millimeter wave radar sensor assembly do not match B Result: 2 B REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S24004513992014102400000) Result: 1 A See step 2
  2. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. HINT: The country specification information stored in the driving support ECU assembly is determined by the country specification information stored in the main body ECU (multiplex network body ECU). If the country specification information for the millimeter wave radar sensor assembly matches the vehicle, the country specification information for the main body ECU (multiplex network body ECU) and driving support ECU assembly is incorrect and the main body ECU (multiplex network body ECU) and driving support ECU assembly need to be replaced. Result Result Proceed to DTC C1A0A is not output A DTC C1A0A is output B Result: 1 A USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665529-S21853141262014102400000) Result: 2 B REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND DRIVING SUPPORT ECU ASSEMBLY
  1. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. Result Result Proceed to DTC C1A01 is not output A DTC C1A01 is output B Result: 1 A USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665529-S21853141262014102400000) Result: 2 B REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S04305393192014102400000)

Note. Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU). If the main body ECU (multiplex network body ECU) is replaced, refer to Registration. Refer to REGISTRATION [04/2013 - ] The pre-collision system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the pre-collision system after confirming that the communication systems are functioning properly. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]

  1. READ VALUE USING TECHSTREAM (COUNTRY# (DSS)) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Pre-Collision 2 / Data List. Read the Data List according to the display on the Techstream. Body Electrical > Pre-Collision 2 > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note Country# (DSS) Destination country for driving support ECU assembly JPN, NA, EURO, AUS, SAFC, OTHER, TWN, CHINA, THAI, GCC or NOFIX Actual country code - Body Electrical > Pre-Collision 2 > Data List Tester Display Country# (DSS) NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. HINT: The country specification information stored in the driving support ECU assembly is determined by the country specification information stored in the main body ECU (multiplex network body ECU). If the country specification information for the millimeter wave radar sensor assembly matches the vehicle, the country specification information for the main body ECU (multiplex network body ECU) and driving support ECU assembly is incorrect and the main body ECU (multiplex network body ECU) and driving support ECU assembly need to be replaced. Result Result Proceed to Country specification information for vehicle and driving support ECU assembly match A Country specification information for vehicle and driving support ECU assembly do not match B Result: 2 B REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND DRIVING SUPPORT ECU ASSEMBLY Result: 1 A See step 2
  2. CHECK FOR DTCs (PRE-COLLISION 2) Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Make sure that the DTC detection conditions are met. HINT: If the detection conditions are not met, the system cannot detect the malfunction. Check for DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes NOTE: When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored. Result Result Proceed to DTC C1A02 is not output A DTC C1A02 is output B Result: 1 A USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665529-S21853141262014102400000) Result: 2 B REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S04305393192014102400000)
  1. CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK Result Proceed to NEXT Result: 1 NEXT See step 2
  2. INSPECT BATTERY VOLTAGE Measure the battery voltage with the engine switch off. Standard Voltage 11 to 14 V Using the parts location and system diagram, check the system for blown-out fuses, open or short circuits in the wire harness(es) and connectors that are not properly connected by performing a visual check. HINT: If the voltage is 11 V or less, replace or recharge the battery before proceeding to the next step. Result Proceed to NEXT Result: 1 NEXT See step 3
  3. CHECK DRIVING SUPPORT ECU ASSEMBLY Check driving support ECU assembly. NOTE: As the connector may be damaged if a load of more than 10 kg (22 lb) is applied to it, do not apply any more load than necessary to the connector. Disconnect the M1 driving support ECU assembly connector. Measure the resistance and voltage on the wire harness side connector according to the value(s) in the table below. NOTE: DTCs may be output when connectors are disconnected during inspection. Therefore, make sure to clear the DTCs using the Techstream once the inspection has been completed. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition M1-30 (B) - Body ground B - Body ground Power source Engine switch on (IG) 11 to 14 V Engine switch off Below 1 V M1-25 (GND) - Body ground BR - Body ground Ground Always Below 1 ohms Result Proceed to OK NG Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR Result: 1 OK See step 4
  4. INSPECT MILLIMETER WAVE RADAR SENSOR ASSEMBLY (BEAM AXIS MISALIGNMENT READING) NOTE: Before checking the millimeter wave radar sensor assembly beam axis deviation, check the installation condition of the millimeter wave radar sensor assembly. Adjust the reflector height. Refer to «ADJUSTMENT [04/2013 - ]»(ref-665556-S25139163572014102400000) Place the reflector. Refer to «ADJUSTMENT [04/2013 - ]»(ref-665556-S25139163572014102400000) Connect the Techstream to the DLC3. Turn the Techstream on. Turn the cruise control switch (ON/OFF button) on. Enter the following menus: Powertrain / Radar Cruise / Utility / Beam Axis Misalignment Reading. Check the amount of misalignment and make a note. Powertrain > Radar Cruise > Utility Tester Display Beam Axis Misalignment Reading Result Proceed to NEXT Result: 1 NEXT See step 5
  5. CHECK CAN COMMUNICATION SYSTEM Use the Techstream to check if the CAN communication system is functioning normally. Result Proceed to CAN communication system DTCs are not output CAN communication system DTCs are output Result: 2 CAN communication system DTCs are output GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665785-S15342612202014102400000) Result: 1 CAN communication system DTCs are not output See step 6
  6. CHECK FOR DTCs (PRE-COLLISION 2) Check for DTCs and note any codes that are output. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes Clear the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Clear DTCs Recheck for DTCs. Try to reproduce the DTCs by duplicating the conditions indicated by the DTCs. Refer to «DTC CHECK / CLEAR [04/2013 - ]»(ref-665869-S07968036322014102400000) Body Electrical > Pre-Collision 2 > Trouble Codes Result Proceed to DTCs are not output DTCs are output Result: 2 DTCs are output GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART [04/2013 - ]»(ref-665869-S36698318262014102400000) Result: 1 DTCs are not output See step 7
  7. DATA LIST / ACTIVE TEST Using the Techstream, check the Data List. Refer to «DATA LIST / ACTIVE TEST [04/2013 - ]»(ref-665869-S23888631342014102400000) Using the Techstream, perform the Active Test. Refer to «DATA LIST / ACTIVE TEST [04/2013 - ]»(ref-665869-S23888631342014102400000) Result Proceed to NEXT Result: 1 NEXT See step 8
  8. CHECK VEHICLE CONTROL HISTORY Check whether the vehicle control history (PCS operation history) matches the customer analysis. Refer to «VEHICLE CONTROL HISTORY [04/2013 - ]»(ref-665858-S37063101052014102400000) Result Result Proceed to Vehicle control history matches the customer analysis A Vehicle control history does not match customer analysis or there is no vehicle control history B Result: 1 A END Result: 2 B USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]»(ref-665529-S21853141262014102400000)

Note. When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

  1. READ VALUE USING TECHSTREAM (PCS OFF SWITCH) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Pre-Collision 2 / Data List. Read the Data List according to the display on the Techstream. Body Electrical > Pre-Collision 2 > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note PCS 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 - Body Electrical > Pre-Collision 2 > Data List Tester Display PCS OFF Switch OK When the pre-collision system cancel switch assembly is operated, the display changes as shown above. Result Proceed to OK NG Result: 1 OK PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE [04/2013 - ]»(ref-665869-S11315963652014102400000) Result: 3 NG See step 2
  2. INSPECT PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY Remove the pre-collision system cancel switch assembly. Refer to «REMOVAL [04/2013 - ]»(ref-665801-S24110014442014102400000) Inspect the pre-collision system cancel switch assembly. Refer to «INSPECTION [04/2013 - ]»(ref-665801-S09218984592014102400000) Result Proceed to OK NG Result: 2 NG REPLACE PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665801-S24110014442014102400000) Result: 1 OK See step 3
  3. CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU ASSEMBLY - PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY) Disconnect the M1 driving support ECU assembly connector. Disconnect the K97 pre-collision system cancel switch assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition M1-5 (PBSW) - K97-2 Always Below 1 ohms M1-5 (PBSW) or K97-2 - 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. CHECK HARNESS AND CONNECTOR (PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY - BODY GROUND) Disconnect the K97 pre-collision system cancel switch assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition K97-1 - Body ground Always Below 1 ohms Result Proceed to OK NG Result: 1 OK REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to «REMOVAL [04/2013 - ]»(ref-665556-S04305393192014102400000) Result: 2 NG REPAIR OR REPLACE HARNESS OR CONNECTOR

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