Pre-Collision System (diagnostic Codes & Circuit Tests) (except Phv) Toyota Prius PHV pre-III

DESCRIPTION

The seat belt control ECU receives information from the driving support ECU using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly RH.

Scheme 69

INSPECTION PROCEDURE

Scheme 70

Scheme 71

1. INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH Disconnect the front seat outer belt assembly RH connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition S7-1 - Body ground Power switch on (IG) Below 1 V S7-2 - Body ground Power switch on (IG) Below 1 V Reconnect the front seat outer belt assembly RH connector. NG --> See step 4 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU) Disconnect the cable from the negative (-) battery terminal. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. Disconnect the front seat outer belt assembly RH connector. Disconnect the seat belt control ECU connector. Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition S7-1 - Body ground Power switch on (IG) Below 1 V S7-2 - Body ground Power switch on (IG) Below 1 V Callouts For (Scheme 71) *1 Front view of wire harness connector (to Front Seat Outer Belt Assembly RH) Disconnect the cable from the negative (-) battery terminal. Reconnect the seat belt control ECU and front seat outer belt assembly RH connectors. Connect the cable to the negative (-) battery terminal. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU) OK --> See step 3
3. REPLACE SEAT BELT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv)
4. REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#seat-belt-service-information-except-phv)

The seat belt control ECU receives information from the driving support ECU using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly RH.

PROCEDURE

1. INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH Disconnect the front seat outer belt assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S7-1 - Body ground Always 1 Mohms or higher S7-2 - Body ground Always 1 Mohms or higher Reconnect the front seat outer belt assembly RH connector. NG --> See step 4 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU) Disconnect the cable from the negative (-) battery terminal. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. Disconnect the front seat outer belt assembly RH connector. Disconnect the seat belt control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S7-1 - Body ground Always 1 Mohms or higher S7-2 - Body ground Always 1 Mohms or higher S7-1 - S7-2 Always 1 Mohms or higher Callouts For see scheme 6 *1 Front view of wire harness connector (to Front Seat Outer Belt Assembly RH) Reconnect the seat belt control ECU and front seat outer belt assembly RH connectors. Connect the cable to the negative (-) battery terminal. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU) OK --> See step 3
3. REPLACE SEAT BELT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv)
4. REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#seat-belt-service-information-except-phv)

The seat belt control ECU receives information from the driving support ECU using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly RH.

Scheme 72

1. INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH Disconnect the front seat outer belt assembly RH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S7-1 - S7-2 Always Below 20 ohms Reconnect the front seat outer belt assembly RH connector. NG --> See step 4 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU) Disconnect the cable from the negative (-) battery terminal. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. Disconnect the front seat outer belt assembly RH connector. Disconnect the seat belt control ECU connector. Using a service wire, connect 1 and 2 of the connector on the front seat outer belt assembly RH. NOTE: Do not forcibly insert the service wire into the terminals of the connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L2-1 (MOR-) - L2-2 (MOR+) Always Below 1 ohms Callouts For (Scheme 72) *1 Front view of wire harness connector (to Front Seat Outer Belt Assembly RH) *2 Front view of wire harness connector (to Seat Belt Control ECU) Reconnect the seat belt control ECU and front seat outer belt assembly RH connectors. Connect the cable to the negative (-) battery terminal. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU) OK --> See step 3
3. REPLACE SEAT BELT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv)
4. REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#seat-belt-service-information-except-phv)

The seat belt control ECU receives information from the driving support ECU using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly LH.

Scheme 73

Scheme 74

Scheme 75

1. INSPECT FRONT SEAT OUTER BELT ASSEMBLY LH Disconnect the front seat outer belt assembly LH connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition R8-1 - Body ground Power switch on (IG) Below 1 V R8-2 - Body ground Power switch on (IG) Below 1 V Reconnect the front seat outer belt assembly LH connector. NG --> See step 4 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY LH - SEAT BELT CONTROL ECU) Disconnect the cable from the negative (-) battery terminal. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. Disconnect the front seat outer belt assembly LH connector. Disconnect the seat belt control ECU connector. Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition R8-1 - Body ground Power switch on (IG) Below 1 V R8-2 - Body ground Power switch on (IG) Below 1 V Callouts For (Scheme 75) *1 Front view of wire harness connector (to Front Seat Outer Belt Assembly LH) Disconnect the cable from the negative (-) battery terminal. Reconnect the seat belt control ECU and front seat outer belt assembly LH connectors. Connect the cable to the negative (-) battery terminal. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY LH - SEAT BELT CONTROL ECU) OK --> See step 3
3. REPLACE SEAT BELT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv)
4. REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#seat-belt-service-information-except-phv)

The seat belt control ECU receives information from the driving support ECU using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly LH.

1. INSPECT FRONT SEAT OUTER BELT ASSEMBLY LH Disconnect the front seat outer belt assembly LH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition R8-1 - Body ground Always 1 Mohms or higher R8-2 - Body ground Always 1 Mohms or higher Reconnect the front seat outer belt assembly LH connector. NG --> See step 4 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY LH - SEAT BELT CONTROL ECU) Disconnect the cable from the negative (-) battery terminal. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. Disconnect the front seat outer belt assembly LH connector. Disconnect the seat belt control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition R8-1 - Body ground Always 1 Mohms or higher R8-2 - Body ground Always 1 Mohms or higher R8-1 - R8-2 Always 1 Mohms or higher Callouts For see scheme 15 *1 Front view of wire harness connector (to Front Seat Outer Belt Assembly LH) Reconnect the front seat outer belt assembly LH and seat belt control ECU connectors. Connect the cable to the negative (-) battery terminal. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY LH - SEAT BELT CONTROL ECU) OK --> See step 3
3. REPLACE SEAT BELT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv)
4. REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#seat-belt-service-information-except-phv)

The seat belt control ECU receives information from the driving support ECU using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly LH.

Scheme 76

1. INSPECT FRONT SEAT OUTER BELT ASSEMBLY LH Disconnect the front seat outer belt assembly LH connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition R8-1 - R8-2 Always Below 20 ohms Reconnect the front seat outer belt assembly LH connector. NG --> See step 4 OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY LH - SEAT BELT CONTROL ECU) Disconnect the cable from the negative (-) battery terminal. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. Disconnect the front seat outer belt assembly LH connector. Disconnect the seat belt control ECU connector. Using a service wire, connect 1 and 2 of the connector on the front seat outer belt assembly LH. NOTE: Do not forcibly insert the service wire into the terminals of the connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L2-3 (MOL+) - L2-4 (MOL-) Always Below 1 ohms Callouts For (Scheme 76) *1 Front view of wire harness connector (to Front Seat Outer Belt Assembly LH) *2 Front view of wire harness connector (to Seat Belt Control ECU) Reconnect the seat outer belt assembly LH and seat belt control ECU connectors. Connect the cable to the negative (-) battery terminal. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY LH - SEAT BELT CONTROL ECU) OK --> See step 3
3. REPLACE SEAT BELT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv)
4. REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#seat-belt-service-information-except-phv)

The DTCs above are stored during seat belt control ECU self diagnosis.

HINT

1. When DTC B2015 or B2016 is detected, DTCs B2026 and B2027 will not be detected.
2. When DTC B2020 or B2021 is detected, DTCs B2031 and B2032 will not be detected.

1. CHECK DTC OUTPUT Using the Techstream, enter the following menus: Body Electrical / Pre-Collision / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Turn the power switch off. Turn the power switch on (IG). Recheck for DTCs. OK DTCs are not output. NG --> See step 3 OK --> See step 2
2. CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/hoistjack/#introduction-except-phv)
3. REPLACE SEAT BELT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv)

If the seat belt control ECU judges that there is a malfunction in its internal circuit as a result of self-diagnosis, or if the power source voltage (+B) is not input to the seat belt control ECU, this DTC will be stored.

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

Scheme 77

1. INSPECT SEAT BELT CONTROL ECU (+B TERMINAL VOLTAGE) Disconnect the cable from the negative (-) battery terminal. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. Disconnect the seat belt control ECU connector. Connect the cable to the negative (-) battery terminal. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition L2-7 (+B) - Body ground Power switch off 11 to 14 V Callouts For (Scheme 77) *1 Front view of wire harness connector (to Seat Belt Control ECU) Disconnect the cable from the negative (-) battery terminal. Reconnect seat belt control ECU connector. Connect the cable to the negative (-) battery terminal. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (+B CIRCUIT) OK --> See step 2
2. REPLACE SEAT BELT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv)

This DTC is stored when a malfunction in the electronically controlled brake system is detected. This circuit consists of the brake booster with master cylinder (skid control ECU) and seat belt control ECU. Signals are sent from the brake booster with master cylinder (skid control ECU) using the CAN communication.

HINT

This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection . Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM) Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Recheck for DTCs. OK CAN communication system DTC is not output. NG --> See step 6 OK: Go to next step
2. CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) Check DTCs for the electronically controlled brake system . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/anti-locktraction-control/#electronically-controlled-brake-system-diagnostics-introduction-except-phv) . OK Electronically controlled brake system DTC is not output. NG --> See step 4 OK: Go to next step
3. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Drive the vehicle. Recheck for DTCs. OK DTC B2060 is not output. NG --> See step 5 OK --> See step 7
4. GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-phv/pre-iii-2010-2011/remont/anti-locktraction-control/#electronically-controlled-brake-system-diagnostics-introduction-except-phv__diagnostic-trouble-code-chart)
5. REPLACE SEAT BELT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv)
6. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/communication-devices/#can-communication-system-diagnostics-introduction-except-phv__how-to-proceed-with-troubleshooting)
7. CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/hoistjack/#introduction-except-phv)

The seat belt control ECU is connected to the main body ECU using CAN communication.

The seat belt control ECU receives vehicle model information from the main body ECU and determines whether the seat belt buckle switch information from the center airbag sensor assembly is for the driver seat or the passenger seat.

DTC B2064 is stored when the CAN communication frame with the main body ECU is normal and communication is available, but the steering wheel position information is not set or varies.

HINT

This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection . Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM) Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Recheck for DTCs. OK CAN communication system DTC is not output. NG --> See step 7 OK: Go to next step
2. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Recheck for DTCs. OK DTC B2064 is not output. NG --> See step 3 OK --> See step 6
3. REPLACE MAIN BODY ECU Replace the main body ECU . Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/body-electrical/#power-distribution-service-information-except-phv) . NEXT: Go to next step
4. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Recheck for DTCs. OK DTC B2064 is not output. NG --> See step 5 OK --> END
5. REPLACE SEAT BELT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv)
6. CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/hoistjack/#introduction-except-phv)
7. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/communication-devices/#can-communication-system-diagnostics-introduction-except-phv__how-to-proceed-with-troubleshooting)

These DTCs are stored when a malfunction is detected in the driver side buckle switch circuit or passenger side buckle switch circuit.

Scheme 78

HINT

This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection . Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM) Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Recheck for DTCs. OK CAN communication system DTC is not output. NG --> See step 5 OK: Go to next step
2. CHECK DTC OUTPUT (AIR BAG SYSTEM) Check DTCs for the air bag system . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/airbag/#airbag-system-diagnostics-introduction-except-phv) . OK Airbag system DTC is not output. NG --> See step 6 OK: Go to next step
3. CHECK DTC OUTPUT (OCCUPANT CLASSIFICATION SYSTEM) Check DTCs for the occupant classification system . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#occupant-classification-system-diagnostics-introduction-except-phv__dtc-checkclear) . OK DTC B1771 is not output. NG --> See step 7 OK: Go to next step
4. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Recheck for DTCs. OK DTC B2074 or B2075 is not output. NG --> See step 8 OK --> See step 9
5. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/communication-devices/#can-communication-system-diagnostics-introduction-except-phv__how-to-proceed-with-troubleshooting)
6. GO TO AIR BAG SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-phv/pre-iii-2010-2011/remont/airbag/#airbag-system-diagnostics-introduction-except-phv__diagnostic-trouble-code-chart)
7. GO TO OCCUPANT CLASSIFICATION SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#occupant-classification-system-diagnostics-introduction-except-phv__diagnostic-trouble-code-chart)
8. REPLACE SEAT BELT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv)
9. CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/hoistjack/#introduction-except-phv)

This DTC is stored when CAN communication between the driving support ECU and brake booster with master cylinder (skid control ECU) is interrupted.

This circuit consists of the driving support ECU, brake booster with master cylinder (skid control ECU) and seat belt control ECU. DTC B2085 is stored when the seat belt control ECU detects an interruption in CAN communication between the driving support ECU and brake booster with master cylinder (skid control ECU).

HINT

This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection . Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM) Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Check for DTCs. OK CAN communication system DTC is output. NG --> See step 4 OK: Go to next step
2. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Check for DTCs. OK DTC B2085 is not output. NG --> See step 5 OK --> See step 3
3. CHECK FOR INTERMITTENT PROBLEMS (SYMPTOMS SIMULATION). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/hoistjack/#introduction-except-phv)
4. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/communication-devices/#can-communication-system-diagnostics-introduction-except-phv__how-to-proceed-with-troubleshooting)
5. REPLACE SEAT BELT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv)

The seat belt control ECU receives collision information from the driving support ECU and brake booster with master cylinder (skid control ECU) via CAN communication, and tightens the seat belt by operating the motor inside the front seat outer belt.

When the driving support ECU detects a malfunction in the dynamic radar cruise control system and pre-collision system, the malfunction information is sent to the seat belt control ECU, which outputs this DTC.

When DTC B2090 is detected, other DTCs are also stored by the driving support ECU (dynamic radar cruise control system and pre-collision system).

Also, if the lane recognition camera sensor assembly beam axis adjustment is not performed after installing the lane recognition camera sensor assembly, DTC B2090 is stored.

HINT

When clearing the DTCs, first clear the DTC output from the driving support ECU (Pre-Collision 2), and then clear the DTC output from the seat belt control ECU.

1. CHECK DTC OUTPUT (DYNAMIC RADAR CRUISE CONTROL SYSTEM) Check DTCs for dynamic radar cruise control system . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#dynamic-radar-cruise-control-system-diagnostics-introduction-except-phv__dtc-check-clear) . OK Dynamic radar cruise control system DTCs are not output. NG --> See step 5 OK: Go to next step
2. CHECK DTC OUTPUT (DRIVING SUPPORT ECU (PRE-COLLISION 2)) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Check for DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . OK "Pre-Collision 2" DTC is not output. Result Result Proceed to OK (with Lane Keeping Assist System) A OK (without Lane Keeping Assist System) B NG C C --> See step 6 B --> See step 4 A: Go to next step
3. ADJUST LANE RECOGNITION CAMERA SENSOR ASSEMBLY Adjust the lane recognition camera sensor assembly . Refer to «ADJUSTMENT»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv__adjustment) . NEXT: Go to next step
4. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Recheck for DTCs. OK DTC B2090 is not output. NG --> See step 7 OK --> END
5. GO TO DYNAMIC RADAR CRUISE CONTROL SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#dynamic-radar-cruise-control-system-diagnostics-introduction-except-phv__diagnostic-trouble-code-chart)
6. GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__diagnostic-trouble-code-chart)
7. REPLACE SEAT BELT CONTROL ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv)

The driving support ECU uses the millimeter wave radar sensor and lane recognition camera sensor to detect obstacles in front of the vehicle.

Based on this information, the driving support ECU calculates the risk of a collision and operates the pre-collision system when it determines that the risk is high.

1. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Recheck for DTCs. OK DTC C1A01 is not output. NG --> See step 2 OK --> See step 3
2. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)
3. CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/hoistjack/#introduction-except-phv)

When a new driving support ECU is installed, it receives vehicle specification information (destination, steering wheel position, 2WD or AWD information, etc.) from the main body ECU and ECM and memorizes the information.

DTC C1A02 is stored when the driving support ECU receives the vehicle specification information from the main body ECU but cannot record it.

HINT

This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection . Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

1. CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Recheck for DTCs. OK CAN communication system DTC is not output. NG --> See step 3 OK --> See step 2
2. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)
3. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/communication-devices/#can-communication-system-diagnostics-introduction-except-phv__how-to-proceed-with-troubleshooting)

The driving support ECU uses the millimeter wave radar sensor and lane recognition camera sensor to detect obstacles in front of the vehicle.

Based on this information, the driving support ECU sends pre-collision control operation signals.

When the millimeter wave radar sensor is replaced with a new one, it acquires the country specification information from the driving support ECU. Also, when the driving support ECU is replaced with a new one, it receives country specification information from the main body ECU. When country specification information in the sensor, ECU and/or main body ECU do not match, DTC C1A0A is stored.

Note. When the millimeter wave radar sensor is replaced with a new one, adjustment of the radar sensor beam axis must be performed . Refer to ADJUSTMENT .

1. CHECK MILLIMETER WAVE RADAR SENSOR Using the Techstream, enter the following menus: Powertrain / Radar Cruise / Data List. RADAR CRUISE Tester Display Measurement Item/Range Normal Condition Diagnostic Note Country# (F Radar Sens) Millimeter wave radar sensor country signal/JPN, NA, EURO, AUS, SAFC, OTHER, TWN, CHINA, THAI, GCC, NOFIX Actual country code - Read the Data List and check the country specification information of the millimeter wave radar sensor and vehicle. RESULT Result Proceed to Country specification information for vehicle and millimeter wave radar sensor match A Country specification information for vehicle and millimeter wave radar sensor do not match B B --> See step 4 A: Go to next step
2. REPLACE MAIN BODY ECU Replace the main body ECU . Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/body-electrical/#power-distribution-service-information-except-phv) . NEXT: Go to next step
3. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Recheck for DTCs. OK DTC C1A0A is not output. NG --> See step 5 OK --> END
4. REPLACE MILLIMETER WAVE RADAR SENSOR. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)
5. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)

for Lane keeping Assist System

When the lane recognition camera sensor assembly is replaced with a new one, it acquires the country specification information from the driving support ECU. The lane recognition camera sensor assembly has information about the market it is intended for use in (country specification information such as the destination, steering wheel position, etc.). When a new camera sensor is installed and the country specification information does not match that of the driving support ECU, the ECU stores DTC C1A0C.

Note. When the lane recognition camera sensor assembly is replaced with a new one, adjust the lane recognition camera sensor assembly . Refer to ADJUSTMENT .

1. REPLACE LANE RECOGNITION CAMERA SENSOR ASSEMBLY Replace the lane recognition camera sensor assembly . Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv) . Adjust the lane recognition camera sensor assembly . Refer to «ADJUSTMENT»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv__adjustment) . NEXT: Go to next step
2. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Turn the power switch off. Turn the power switch on (IG). Drive the vehicle. Recheck for DTCs. OK DTC C1A0C is not output. NG --> See step 3 OK --> END
3. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)

The driving support ECU uses the millimeter wave radar sensor and lane recognition camera sensor to detect obstacles in front of the vehicle.

Based on this information, the driving support ECU sends pre-collision control operation signals.

When the driving support ECU receives information that there is a malfunction in the millimeter wave radar sensor, DTC C1A10 is stored.

Note. When the millimeter wave radar sensor is replaced with a new one, adjustment of the radar sensor beam axis must be performed . Refer to ADJUSTMENT .

1. REPLACE MILLIMETER WAVE RADAR SENSOR Replace the millimeter wave radar sensor . Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv) . NEXT: Go to next step
2. ADJUST MILLIMETER WAVE RADAR SENSOR Adjust the millimeter wave radar sensor . Refer to «ADJUSTMENT»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv) . NEXT: Go to next step
3. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Recheck for DTCs. OK DTC C1A10 is not output. NG --> See step 4 OK --> END
4. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)

The driving support ECU uses the millimeter wave radar sensor and lane recognition camera sensor to detect obstacles in front of the vehicle.

Based on this information, the driving support ECU sends pre-collision control operation signals.

When the vehicle is determined to be driving in a straight line or on a slow curve based on signals from the yaw rate sensor etc., the millimeter wave radar sensor performs a self diagnosis to check if the sensor beam axis is deviated from the vehicle movement direction. When the millimeter wave radar sensor beam axis is deviated, the driving support ECU detects this, and stores DTC C1A11.

After installing a new millimeter wave radar sensor, if the sensor beam axis adjustment is not performed, DTC C1A14 is stored.

Note. When the millimeter wave radar sensor is replaced with a new one, adjustment of the radar sensor beam axis must be performed . Refer to ADJUSTMENT .

1. ADJUST MILLIMETER WAVE RADAR SENSOR Check the millimeter wave radar sensor installation . Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv) . Adjust the millimeter wave radar sensor . Refer to «ADJUSTMENT»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv) . NEXT: Go to next step
2. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Drive the vehicle. Recheck for DTCs. OK DTC C1A11 or C1A14 is not output. HINT: After performing the radar beam axis adjustment, if the same DTC is output again after the DTC detection conditions are met, replace the driving support ECU. NG --> See step 3 OK --> END
3. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)

for Lane keeping Assist System

When the driving support ECU receives information that there is a malfunction in the lane recognition camera sensor assembly, DTC C1A20 is stored.

Note. When the lane recognition camera sensor assembly is replaced with a new one, adjust the lane recognition camera sensor assembly . Refer to ADJUSTMENT .

1. REPLACE LANE RECOGNITION CAMERA SENSOR ASSEMBLY Replace the lane recognition camera sensor assembly . Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv) . Adjust the lane recognition camera sensor assembly . Refer to «ADJUSTMENT»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv__adjustment) . NEXT: Go to next step
2. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Turn the power switch off. Turn the power switch on (IG). Drive the vehicle at a speed of 50 km/h (30 mph) or more with lane keeping assist switch on. Recheck for DTCs. OK DTC C1A20 is not output. NG --> See step 3 OK --> END
3. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)

for Lane keeping Assist System

If the driving support ECU determines that the lane recognition camera sensor assembly axis is deviated, DTC C1A22 is stored. Also, if the lane recognition camera sensor assembly beam axis adjustment is not performed after installing the lane recognition camera sensor assembly, DTC C1A23 is stored.

Note. When the lane recognition camera sensor assembly is replaced with a new one, adjust the lane recognition camera sensor assembly . Refer to ADJUSTMENT .

1. ADJUST LANE RECOGNITION CAMERA SENSOR ASSEMBLY Adjust the lane recognition camera sensor assembly . Refer to «ADJUSTMENT»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv__adjustment) . NEXT: Go to next step
2. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Turn the power switch off. Turn the power switch on (IG). Drive the vehicle at a speed of 50 km/h (30 mph) or more with lane keeping assist switch on. Recheck for DTCs. OK DTC is not output. NG --> See step 3 OK --> END
3. REPLACE LANE RECOGNITION CAMERA SENSOR ASSEMBLY Replace the lane recognition camera sensor assembly . Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv) . Adjust the lane recognition camera sensor assembly . Refer to «ADJUSTMENT»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv__adjustment) . NEXT: Go to next step
4. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Turn the power switch off. Turn the power switch on (IG). Drive the vehicle at a speed of 50 km/h (30 mph) or more with lane keeping assist switch on. Recheck for DTCs. OK DTC is not output. NG --> See step 5 OK --> END
5. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)

When the driving support ECU receives a hybrid control system or engine control system malfunctioning signal from the power management control ECU via the CAN communication system, DTC C1A40 is stored.

When DTC C1A40 is detected, the hybrid control system or engine control system DTC will also be detected.

1. CHECK DTC OUTPUT (HYBRID CONTROL SYSTEM) Check DTCs for the hybrid control system . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/engine-control-systems/#hybrid-control-system-diagnostics-introduction-except-phv) . OK Hybrid control system DTC is not output. NG --> See step 5 OK: Go to next step
2. CHECK DTC OUTPUT (ENGINE CONTROL SYSTEM) Check DTCs for engine control system . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/testing-diagnostics/#engine-control-sfi-system-diagnostics-introduction-except-phv__dtc-check-clear) . OK Engine control system DTC is not output. NG --> See step 6 OK: Go to next step
3. REPLACE POWER MANAGEMENT CONTROL ECU Replace the power management control ECU . Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/body-electrical/#power-distribution-service-information-except-phv) . NEXT: Go to next step
4. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Check for DTCs. OK DTC C1A40 is not output. NG --> See step 7 OK --> END
5. GO TO HYBRID CONTROL SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-phv/pre-iii-2010-2011/remont/engine-control-systems/#hybrid-control-system-diagnostics-introduction-except-phv__diagnostic-trouble-code-chart)
6. GO TO ENGINE CONTROL SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-phv/pre-iii-2010-2011/remont/testing-diagnostics/#engine-control-sfi-system-diagnostics-introduction-except-phv__diagnostic-trouble-code-chart)
7. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)

The brake booster with master cylinder (skid control ECU) receives brake control request signals from the power management control ECU and driving support ECU.

When the request signals received from the power management control ECU and driving support ECU are not consistent, the brake booster with master cylinder (skid control ECU) determines that a malfunction has occurred and sends a malfunction signal to the driving support ECU.

If the driving support ECU receives a malfunction signal, DTC C1A41 is stored.

1. CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) Check DTCs for the electronically controlled brake system . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/anti-locktraction-control/#electronically-controlled-brake-system-diagnostics-introduction-except-phv) . OK Electronically controlled brake system DTC is not output. NG --> See step 7 OK: Go to next step
2. CHECK DTC OUTPUT (HYBRID CONTROL SYSTEM) Check DTCs for the hybrid control system . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/engine-control-systems/#hybrid-control-system-diagnostics-introduction-except-phv) . OK Hybrid control system DTC is not output. NG --> See step 8 OK: Go to next step
3. REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Replace the brake booster with master cylinder (skid control ECU) . Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/mechanical-hydraulic/#brake-system-service-information-except-phv) . NEXT: Go to next step
4. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Check for DTCs. OK DTC C1A41 is not output. NG --> See step 5 OK --> END
5. REPLACE POWER MANAGEMENT CONTROL ECU Replace the power management control ECU . Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/body-electrical/#power-distribution-service-information-except-phv) . NEXT: Go to next step
6. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Recheck for DTCs. OK DTC C1A41 is not output. NG --> See step 9 OK --> END
7. GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-phv/pre-iii-2010-2011/remont/anti-locktraction-control/#electronically-controlled-brake-system-diagnostics-introduction-except-phv__diagnostic-trouble-code-chart)
8. GO TO HYBRID CONTROL SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-phv/pre-iii-2010-2011/remont/engine-control-systems/#hybrid-control-system-diagnostics-introduction-except-phv__diagnostic-trouble-code-chart)
9. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)

The brake booster with master cylinder (skid control ECU) receives vehicle stability signals from the yaw rate sensor and sends the signals to the driving support ECU and power management control ECU. If the brake booster with master cylinder (skid control ECU) detects that the yaw rate sensor is malfunctioning, the brake booster with master cylinder (skid control ECU) sends a malfunction signal to the driving support ECU, and the driving support ECU stores DTC C1A46. Also, when DTC C1A46 is stored, the brake booster with master cylinder (skid control ECU) stores DTC C1234 at the same time.

HINT

This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection . Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

1. CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) Check DTCs for the electronically controlled brake system . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/anti-locktraction-control/#electronically-controlled-brake-system-diagnostics-introduction-except-phv) . OK DTC C1234 is not output. NG --> See step 4 OK: Go to next step
2. REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Replace the brake booster with master cylinder (skid control ECU) . Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/mechanical-hydraulic/#brake-system-service-information-except-phv) . NEXT: Go to next step
3. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Driver the vehicle. Recheck for DTCs. OK DTC C1A46 is not output. NG --> See step 5 OK --> See step 6
4. GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-phv/pre-iii-2010-2011/remont/anti-locktraction-control/#electronically-controlled-brake-system-diagnostics-introduction-except-phv__diagnostic-trouble-code-chart)
5. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)
6. CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/hoistjack/#introduction-except-phv)

The brake booster with master cylinder (skid control ECU) receives steering rotation angle information from the steering angle sensor, and sends the information to the driving support ECU through the CAN communication line.

If the brake booster with master cylinder (skid control ECU) detects a malfunction of the steering angle sensor, it sends a malfunction signal to the driving support ECU and records a DTC.

HINT

This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection . Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

1. CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) Check DTCs for the electronically controlled brake system . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/anti-locktraction-control/#electronically-controlled-brake-system-diagnostics-introduction-except-phv) . OK Electronically controlled brake system DTC is not output. NG --> See step 4 OK: Go to next step
2. REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Replace the brake booster with master cylinder (skid control ECU) . Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/mechanical-hydraulic/#brake-system-service-information-except-phv) . NEXT: Go to next step
3. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Drive the vehicle. Recheck for DTCs. OK DTC C1A47 is not output. NG --> See step 5 OK --> See step 6
4. GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-phv/pre-iii-2010-2011/remont/anti-locktraction-control/#electronically-controlled-brake-system-diagnostics-introduction-except-phv__diagnostic-trouble-code-chart)
5. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)
6. CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION ). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/hoistjack/#introduction-except-phv)

Based on pre-collision control, the driving support ECU communicates to the driver to be careful. The driving support ECU performs this by sending a sounding signal to the brake booster with master cylinder (skid control ECU) to sound the skid control buzzer.

When the brake booster with master cylinder (skid control ECU) detects a malfunction in the VSC warning buzzer circuit, a malfunction signal is sent to the driving support ECU, and a DTC is stored. Although the brake booster with master cylinder (skid control ECU) sends a malfunction signal to the driving support ECU, the vehicle stability control system does not stored a relevant malfunction detection DTC.

HINT

This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection . Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

1. PERFORM ACTIVE TEST USING TECHSTREAM (SKID CONTROL BUZZER) Select the Active Test, use the Techstream to generate a control command, then check that the skid control buzzer sounds . Refer to «DATA LIST / ACTIVE TEST»(/toyota/prius-phv/pre-iii-2010-2011/remont/anti-locktraction-control/#electronically-controlled-brake-system-diagnostics-introduction-except-phv__data-list-active-test) . CHASSIS/ABS/VSC/TRAC Tester Display Test Part Control Range Diagnostic Note Buzzer Skid control buzzer sounds ON/OFF - OK Skid control buzzer sounds. NG --> See step 4 OK: Go to next step
2. REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Replace the brake booster with master cylinder (skid control ECU) . Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/mechanical-hydraulic/#brake-system-service-information-except-phv) . NEXT: Go to next step
3. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Recheck for DTCs. OK DTC C1A4A is not output. NG --> See step 5 OK --> END (SKID CONTROL ECU ASSEMBLY WAS DEFECTIVE)
4. GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to «Skid Control Buzzer Circuit»(/toyota/prius-phv/pre-iii-2010-2011/remont/anti-locktraction-control/#electronically-controlled-brake-system-diagnostic-codes-circuit-tests-except-phv)
5. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)

The stop light switch assembly outputs a brake pedal operation signal to the driving support ECU. Based on the signal, the driving support ECU cancels cruise control.

Note. When this DTC is output, malfunction in the lighting system is suspected. Check if the lighting system is functioning normally . Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

1. CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) Check DTC for electronically controlled brake system . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/anti-locktraction-control/#electronically-controlled-brake-system-diagnostics-introduction-except-phv) . OK Electronically controlled brake system DTC is not output. NG --> See step 5 OK: Go to next step
2. REPLACE BRAKE BOOSTER WITH MASTER CYLINDER Replace the brake booster with master cylinder (skid control ECU) . Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/mechanical-hydraulic/#brake-system-service-information-except-phv) . NEXT: Go to next step
3. CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs . Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear) . Check for DTCs. OK DTC U0122 is not output. NG --> See step 6 OK --> See step 4
4. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)
5. GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/toyota/prius-phv/pre-iii-2010-2011/remont/anti-locktraction-control/#electronically-controlled-brake-system-diagnostics-introduction-except-phv__diagnostic-trouble-code-chart)
6. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/communication-devices/#can-communication-system-diagnostics-introduction-except-phv__how-to-proceed-with-troubleshooting)

1. The driving support ECU uses the millimeter wave radar sensor to detect obstacles in front of the vehicle. Based on this information, the driving support ECU sends pre-collision control operation signals. These DTCs are stored when a communication malfunction occurs between the sensors and ECUs that detect collisions, or between ECUs that perform the pre-collision control.

1. The driving support ECU sends vehicle speed and vehicle condition information to the millimeter wave radar sensor. The millimeter wave radar sensor then sends information on the presence, distance, and relative speed of objects ahead to the driving support ECU. The driving support ECU sends this information to the ECM and performs pre-collision system (DTC U1104). DTC No. DTC Detection Condition Trouble Area U0122 When the power switch is on (IG), a communication error between the brake booster with master cylinder (skid control ECU) and the driving support ECU is detected for approx. 1 second. When the power switch is on (IG), a communication error between the skid control ECU assembly and the seat belt control ECU is detected for approx. 1 second. Brake booster with master cylinder (skid control ECU) CAN communication system Seat belt control ECU Driving support ECU U0123 When the power switch is on (IG), a communication error between the yaw rate sensor and the driving support ECU is detected for approx. 1 second. Yaw rate sensor CAN communication system Driving support ECU U0126 When the power switch is on (IG), a communication error between the steering sensor and the driving support ECU is detected for approx. 1 second. Steering angle sensor CAN communication system Driving support ECU U0140 While power switch is on (IG), communication stop between main body ECU and seat belt control ECU continues for 1 second or more. Main body ECU CAN communication system Seat belt control ECU U0151 While power switch is on (IG), communication stop between center airbag sensor and seat belt control ECU continues for 1 second or more. Center airbag sensor CAN communication system Seat belt control ECU U0235 When the power switch is on (IG), a communication error between the millimeter wave radar sensor and the driving support ECU is detected for approx. 1 second. Communication circuit Millimeter wave radar sensor Driving support ECU U0293 When the power switch is on (IG), a communication error between the power management control ECU and brake booster with master cylinder (skid control ECU) is detected for approx. 1 second. When the power switch is on (IG), a communication error between the power management control ECU and driving support ECU is detected for approx. 1 second. Power management control ECU Brake booster with master cylinder (skid control ECU) CAN communication system Driving support ECU U1002 While the power switch is on (IG), communication stop between the lane recognition camera sensor assembly, millimeter wave radar sensor and driving support ECU continues for 1 second or more. Lane recognition camera sensor assembly Millimeter wave radar sensor CAN communication system Driving support ECU U1100 When the power switch is on (IG), a communication error between the seat belt control ECU and the driving support ECU is detected for approx. 1 second. Seat belt control ECU CAN communication system Driving support ECU U1104 When the power switch is on (IG), a communication error between the driving support ECU and the millimeter wave radar sensor is detected for approx. 1 second. When the power switch is on (IG), a communication error between the driving support ECU and the power management control ECU is detected for approx. 1 second. Communication circuit Millimeter wave radar sensor Driving support ECU Power management control ECU CAN communication system

Scheme 79

Note. When replacing the millimeter wave radar sensor with a new one, make sure to perform Adjust Millimeter Wave Radar Sensor Assembly . Refer to ADJUSTMENT . Confirm that the connector is securely connected, as a partially connected connector is suspected for the cause of this DTC.

Scheme 80

Scheme 81

1. READ OUTPUT 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 and Pre-Collision 2 / Trouble Codes. Read the DTCs. Result Result Proceed to DTC U1104 is output A DTC U1104 is not output B B --> See step 7 A: Go to next step
2. CHECK CAN COMMUNICATION SYSTEM Select "CAN Bus Check" from the "System Selection Menu" screen on the Techstream. Select "Communication Malfunction DTC" from the "CAN Bus Check" screen, and then select "Enter". OK CAN communication is normal. NG --> See step 7 OK: Go to next step
3. CHECK MILLIMETER WAVE RADAR SENSOR (IGB VOLTAGE) Disconnect the millimeter wave radar sensor connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A2-5 (IGB) - Body ground Power switch on (IG) 11 to 14 V Callouts For (Scheme 80) *1 Front view of wire harness connector (to Millimeter Wave Radar Sensor) Reconnect the millimeter wave radar sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (IGB CIRCUIT) OK: Go to next step
4. CHECK MILLIMETER WAVE RADAR SENSOR (SGND CIRCUIT) Disconnect the millimeter wave radar sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A2-2 (SGND) - Body ground Always Below 1 ohms Callouts For (Scheme 81) *1 Front view of wire harness connector (to Millimeter Wave Radar Sensor) Reconnect the millimeter wave radar sensor connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (SGND CIRCUIT) OK: Go to next step
5. REPLACE MILLIMETER WAVE RADAR SENSOR Replace the millimeter wave radar sensor. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv). Adjust the millimeter wave radar sensor. Refer to «ADJUSTMENT»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv). NEXT: Go to next step
6. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear). Turn the cruise control main switch on. Drive the vehicle at the required speed (27 mph (45 km/h) or higher). Check if the same DTC is output. Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear). Result Result Proceed to DTC U1104 is not output A DTC U1104 is output B B --> See step 8 A --> END
7. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/communication-devices/#can-communication-system-diagnostics-introduction-except-phv__how-to-proceed-with-troubleshooting)
8. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)

with Lane keeping Assist System.

The driving support ECU uses the millimeter wave radar sensor and lane recognition camera sensor to detect obstacles in front of vehicle.

Because of the location of the lane recognition camera assembly, it is subject to high temperatures. If the lane recognition camera sensor assembly becomes too hot, the power source is shut down to protect the system. At that time CAN communication also stops. However, in order to inform the driving support ECU that CAN communication has not stopped because of a CAN communication error, on/off signals are periodically sent from the HITP terminal.

Scheme 82

HINT

This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system are output . Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

Scheme 83

1. CHECK DTC OUTPUT Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Check for DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear). Result Result Proceed to DTC U1119 is output A DTC other than U1119 is output B B --> See step 9 A: Go to next step
2. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Pre-Collision 2/ Data List / Recog ECU H Temp Hist. Confirm the judgment history. Pre-Collision 2 Tester Display Measurement Item/Range Normal Condition Diagnostic Note Recog ECU H Temp Hist Lane recognition ECU temperature condition history/ ON or OFF ON: History exists OFF: No history - Result Result Proceed to ON is displayed A OFF is displayed B B --> See step 6 A: Go to next step
3. CHECK HARNESS OR CONNECTOR (DRIVING SUPPORT ECU - LANE RECOGNITION CAMERA SENSOR) Disconnect the driving support ECU connector and lane recognition camera sensor connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Condition Condition Specified Condition U4-5 (HITP) - L60-24 (HITP) Always Below 1 ohms U4-5 (HITP) or L60-24 (HITP) - Body ground Always 10 kohms or higher Callouts For (Scheme 83) *1 Front view of wire harness connector (to Lane Recognition Camera Sensor Assembly) *2 Front view of wire harness connector (to Driving Support ECU) Reconnect the connectors. NG --> See step 4 OK --> See step 11
4. REPAIR OR REPLACE HARNESS OR CONNECTOR (DRIVING SUPPORT ECU - LANE RECOGNITION CAMERA SENSOR) Repair or replace harness or connector. NEXT: Go to next step
5. CHECK DTC OUTPUT Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTC. Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear). Turn the power switch off. Start the engine. Drive the vehicle and operate lane keeping assist control. Check for DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear). Result Result Proceed to DTC U1119 is not output A DTC U1119 is output B B --> See step 9 A --> END
6. CHECK CAN COMMUNICATION SYSTEM Check CAN communication system. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/communication-devices/#can-communication-system-diagnostics-introduction-except-phv__how-to-proceed-with-troubleshooting). NG --> GO TO CAN COMMUNICATION CIRCUIT OK: Go to next step
7. REPLACE LANE RECOGNITION CAMERA SENSOR ASSEMBLY Replace lane recognition camera sensor assembly. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv). Adjust the lane recognition camera sensor assembly. Refer to «ADJUSTMENT»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv__adjustment). NEXT: Go to next step
8. CHECK DTC OUTPUT Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__dtc-check-clear). Turn the power switch off. Turn the power switch on (IG). Drive the vehicle and operate lane keeping assist control. Recheck for DTCs. OK DTC is not output. NG --> See step 10 OK --> END
9. GO TO CAN COMMUNICATION CIRCUIT. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(/toyota/prius-phv/pre-iii-2010-2011/remont/communication-devices/#can-communication-system-diagnostics-introduction-except-phv__how-to-proceed-with-troubleshooting)
10. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)
11. REPLACE LANE RECOGNITION CAMERA SENSOR ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)

The driving support ECU receives pre-collision brake on/off signal from pre-collision system cancel switch.

Scheme 84

Scheme 85

Scheme 86

Scheme 87

1. READ VALUE USING TECHSTREAM (PRE-COLLISION BRAKE CANCEL SWITCH) Use the Data List to check if the pre-collision brake cancel switch is functioning properly. PRE-COLLISION 2 Tester Display Measurement Item/Range Normal Condition Diagnostic Note Pre-Collision Brake OFF Switch Pre-collision system cancel switch signal/ON or OFF ON: Pre-collision brake cancel switch on OFF: Pre-collision brake cancel switch off - OK On screen, each item changes between ON and OFF according to above chart. NG --> See step 2 OK --> See step 5
2. INSPECT PRE-COLLISION BRAKE CANCEL SWITCH ASSEMBLY Remove the pre-collision brake cancel switch assembly. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition 1 - 2 Pressed Below 1 ohms Not pressed 10 kohms or higher Callouts For (Scheme 85) *1 Component without harness connected (Pre-collision Brake Cancel Switch Assembly) Reinstall the pre-collision brake cancel switch assembly. Refer to «INSTALLATION»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv__installation). NG --> See step 6 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (PRE-COLLISION BRAKE CANCEL SWITCH - DRIVING SUPPORT ECU) Disconnect the pre-collision brake cancel switch assembly connector. Disconnect the driving support ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L108-1 - L60-5 (PBSW) Always Below 1 ohms L108-1 - Body ground Always 10 kohms or higher Callouts For (Scheme 86) *1 Front view of wire harness connector (to Pre-collision Brake Cancel Switch Assembly) *2 Front view of wire harness connector (to Driving Support ECU) Reconnect the driving support ECU connector. Reconnect the pre-collision brake cancel switch assembly connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (PRE-COLLISION BRAKE CANCEL SWITCH - DRIVING SUPPORT ECU) OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (PRE-COLLISION BRAKE CANCEL SWITCH ASSEMBLY - BODY GROUND) Disconnect the pre-collision brake cancel switch assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L108-2 - Body ground Always Below 1 ohms Callouts For (Scheme 87) *1 Front view of wire harness connector (to Pre-collision Brake Cancel Switch Assembly) Reconnect the pre-collision brake cancel switch assembly connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (PRE-COLLISION BRAKE CANCEL SWITCH ASSEMBLY - BODY GROUND) OK --> See step 7
5. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__problem-symptoms-table)
6. REPLACE PRE-COLLISION BRAKE CANCEL SWITCH ASSEMBLY. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-service-information-except-phv)
7. REPLACE DRIVING SUPPORT ECU. Refer to «REMOVAL»(/toyota/prius-phv/pre-iii-2010-2011/remont/cruise-control-systems/#cruise-control-system-service-information-except-phv)

This circuit supplies power to the seat belt control ECU.

Scheme 88

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

Scheme 89

Scheme 90

Scheme 91

Scheme 92

Scheme 93

Scheme 94

Scheme 95

1. CHECK HARNESS AND CONNECTOR (GND CIRCUIT) Disconnect the seat belt control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Display Condition Specified Condition L2-8 (GND) - Body ground Always Below 1 ohms Callouts For (Scheme 89) *1 Front view of wire harness connector (to Seat Belt Control ECU) Reconnect the seat belt control ECU connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (IG1 CIRCUIT) Disconnect the seat belt control ECU connector. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Display Condition Specified Condition L3-8 (IG1) - L2-8 (GND) Power switch on (IG) 11 to 14 V Callouts For (Scheme 90) *1 Front view of wire harness connector (to Seat Belt Control ECU) *2 Front view of wire harness connector (to Seat Belt Control ECU) Reconnect the seat belt control ECU connector. NG --> See step 4 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (+B CIRCUIT) Disconnect the seat belt control ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Display Condition Specified Condition L2-7 (+B) - Body ground Always 11 to 14 V Callouts For (Scheme 91) *1 Front view of wire harness connector (to Seat Belt Control ECU) Reconnect the seat belt control ECU connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (+B CIRCUIT) OK --> See step 8
4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. *1 Instrument Panel Junction Block Assembly Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2E-1 - 2B-16 Always 10 kohms or higher 2E-1 - 2B-16 When battery voltage applied to terminals 2B-25 and 2B-6 Below 1 ohms Reinstall the instrument panel junction block assembly. NG --> REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - SEAT BELT CONTROL ECU) Disconnect the instrument panel junction block assembly connector. Disconnect the seat belt control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-16 - L3-8 (IG1) Always Below 1 ohms 2B-16 - Body ground Always 10 kohms or higher L3-8 (IG1) - Body ground Always 10 kohms or higher Callouts For (Scheme 93) *1 Front view of wire harness connector (to Seat Belt Control ECU) *2 Front view of wire harness connector (to Instrument Panel Junction Block Assembly) Reconnect the seat belt control ECU connector. Reconnect the instrument panel junction block assembly connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - SEAT BELT CONTROL ECU) OK: Go to next step
6. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BODY GROUND) Disconnect the instrument panel junction block assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-6 - Body ground Always Below 1 ohms Callouts For (Scheme 94) *1 Front view of wire harness connector (to Instrument Panel Junction Block Assembly) Reconnect the instrument panel junction block assembly connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BODY GROUND) OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - POWER MANAGEMENT ECU) Disconnect the instrument panel junction block assembly connector. Disconnect the power management control ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2B-25 - L6-2 (IG1D) Always Below 1 ohms 2B-25 - Body ground Always 10 kohms or higher L6-2 (IG1D) - Body ground Always 10 kohms or higher Callouts For (Scheme 95) *1 Front view of wire harness connector (to Power Management control ECU) *2 Front view of wire harness connector (to Instrument Panel Junction Block Assembly) Reconnect the power management control ECU connector. Reconnect the instrument panel junction block assembly connector. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - POWER MANAGEMENT ECU) OK --> REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BATTERY)
8. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(/toyota/prius-phv/pre-iii-2010-2011/remont/restraints-control-systems/#pre-collision-system-diagnostics-introduction-except-phv__problem-symptoms-table)

See also:
• REMOVAL
• REMOVAL
• DTC CHECK / CLEAR
• HOW TO PROCEED WITH TROUBLESHOOTING
• HOW TO PROCEED WITH TROUBLESHOOTING
• DTC CHECK / CLEAR
• DIAGNOSTIC TROUBLE CODE CHART
• REMOVAL
• DTC CHECK / CLEAR
• DTC CHECK / CLEAR
• DIAGNOSTIC TROUBLE CODE CHART
• DIAGNOSTIC TROUBLE CODE CHART
• DTC CHECK / CLEAR
• ADJUSTMENT
• DIAGNOSTIC TROUBLE CODE CHART
• DIAGNOSTIC TROUBLE CODE CHART
• REMOVAL
• DTC CHECK / CLEAR
• DTC CHECK / CLEAR
• DIAGNOSTIC TROUBLE CODE CHART
• DIAGNOSTIC TROUBLE CODE CHART
• REMOVAL
• DATA LIST / ACTIVE TEST
• Skid Control Buzzer Circuit
• HOW TO PROCEED WITH TROUBLESHOOTING
• INSTALLATION
• PROBLEM SYMPTOMS TABLE