2012 Toyota Prius Service & Repair Manual

SERVICE AND REPAIR MANUAL 2010-2015 TOYOTA PRIUS

2010 ACCESSORIES & EQUIPMENT Advance Parking Guidance System (Diagnostic Codes & Circuit Tests) - Prius (Except PHV) ADVANCED PARKING GUIDANCE SYSTEM DTC C1611: ECU MALFUNCTION DESCRIPTION This DTC is stored if the parking assist ECU judges that there is an internal malfunction as a result of its self check. HINT: The parking assist ECU stores different types of information during initialization. If the parking assist ECU cannot read the stored information when it is activated, the parking assist ECU judges that there is an internal malfunction and stores this DTC. INSPECTION PROCEDURE DTC No. DTC Detection Condition Trouble Area C1611 When one of the following conditions is met:  ROM/SUM check malfunction  Mirror check malfunction  High-speed RAM check malfunction  EEPROM (Initial read) malfunction  RAM check malfunction  CPU busy malfunction  CPU communication malfunction  Integer arithmetic malfunction  FPU calculation malfunction  AISIC output malfunction  Parking assist ECU initialization (not initialized parking assist ECU)  Height control sensor vehicle height difference setting (not initialized parking assist ECU)  Rear television camera optical axis adjustment (initialized parking assist ECU)  Steering angle setting (initialized parking assist ECU)  Parking assist ECU NOTE:  When "System initializing" message is displayed on the navigation receiver assembly after the battery terminal disconnected, correct the steering angle neutral point. Refer to INITIALIZATION .  Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the advanced parking guidance system may be needed. Refer to CALIBRATION . 2010 Toyota Prius 2010 ACCESSORIES & EQUIPMENT Advance Parking Guidance System (Diagnostic Codes & Circuit Tests) - Prius (Except PHV)

PROCEDURE 1. READ VALUE USING TECHSTREAM a. Connect the Techstream to the DLC3. b. Turn the power switch on (IG). c. Turn the Techstream on. d. Enter the following menus: Chassis / Advanced Parking Guidance System / Data List. e. Check the Data List for proper functioning of the following items. ADVANCED PARKING GUIDANCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note ROM/SUM Check Parking assist ECU information/OK or NG OK: Parking assist ECU is normal NG: Parking assist ECU is abnormal - Mirror Check Parking assist ECU information/OK or NG OK: Parking assist ECU is normal NG: Parking assist ECU is abnormal - High-Speed RAM Check Parking assist ECU information/OK or NG OK: Parking assist ECU is normal NG: Parking assist ECU is abnormal - EEPROM Status (Initial read) Parking assist ECU information/OK or NG OK: Parking assist ECU is normal NG: Parking assist ECU is abnormal - RAM Check Parking assist ECU information/OK or NG OK: Parking assist ECU is normal NG: Parking assist ECU is abnormal - CPU Busy Status Parking assist ECU information/OK or NG OK: Parking assist ECU is normal NG: Parking assist ECU is abnormal - CPU Communication Status Parking assist ECU information/OK or NG OK: Parking assist ECU is normal NG: Parking assist ECU is abnormal - Integer Arithmetic Status Parking assist ECU information/OK or NG OK: Parking assist ECU is normal NG: Parking assist ECU is abnormal - 2010 Toyota Prius 2010 ACCESSORIES & EQUIPMENT Advance Parking Guidance System (Diagnostic Codes & Circuit Tests) - Prius (Except PHV)

Result B --> See step 4 A: Go to next step 2. ADJUST SETTINGS (PARKING ASSIST ECU INITIALIZATION) HINT:  The parking assist ECU stores different types of information during initialization. If the parking assist ECU cannot read the stored information when it is activated, the parking assist ECU judges that there is an internal malfunction and stores this DTC.  If the parking assist ECU cannot read the stored information when it is activated, allowing the ECU FPU Calculation Status Parking assist ECU information/OK or NG normal NG: Parking assist ECU is abnormal - AISIC Output Status Output condition of camera display signal/OK or NG OK: Output condition of camera display signal is normal NG: Output condition of camera display signal is abnormal - Result Proceed to OK is displayed for all items. A NG is displayed for EEPROM status (Initial read). A NG is displayed except EEPROM status (Initial read). B 2010 Toyota Prius 2010 ACCESSORIES & EQUIPMENT Advance Parking Guidance System (Diagnostic Codes & Circuit Tests) - Prius (Except PHV)

a. Use the transition of diagnosis screens (note which transition pattern occurs) to confirm if the parking assist ECU was able to properly store the information from initialization. Refer to DIAGNOSIS SYSTEM . HINT: The procedure to make the parking assist ECU store the vehicle information differs when the parking assist ECU has stored the information (initialized) and when the information has not been stored (not initialized). b. Perform the following procedure depending on the memory conditions to register the vehicle information into the parking assist ECU. NEXT: Go to next step 3. CHECK DTC OUTPUT a. Clear the DTCs. Refer to DTC CHECK / CLEAR . b. Check for DTCs. Refer to DTC CHECK / CLEAR . Result Condition Procedure Not initialized Parking assist ECU initialization. Refer to CALIBRATION Initialized  Height control sensor vehicle height difference setting. Refer to CALIBRATION  Rear television camera optical axis adjustment. Refer to CALIBRATION  Steering angle setting. Refer to DIAGNOSIS SYSTEM Result Proceed to DTC A 2010 Toyota Prius 2010 ACCESSORIES & EQUIPMENT Advance Parking Guidance System (Diagnostic Codes & Circuit Tests) - Prius (Except PHV)

HINT:  If DTC C1611 is output, perform the procedure to allow the parking assist ECU to store the vehicle information again.  If DTC C1611 is still output after performing the procedure to make the parking assist ECU store the vehicle information 3 times, replace the parking assist ECU.  If DTC C1611 is output frequently, replace the parking assist ECU even though the DTC is not output when rechecking for DTCs. B --> END A --> See step 4 4. REPLACE PARKING ASSIST ECU. Refer to REMOVAL DTC C1612: IG VOLTAGE IS LOW OR HIGH DESCRIPTION This DTC is stored if the parking assist ECU judges as a result of its self check that the voltage received by terminal IG is low or high. WIRING DIAGRAM is output No DTC is output B DTC No. DTC Detection Condition Trouble Area C1612  IG voltage is low  IG voltage is high  Harness or connector  Parking assist ECU 2010 Toyota Prius 2010 ACCESSORIES & EQUIPMENT Advance Parking Guidance System (Diagnostic Codes & Circuit Tests) - Prius (Except PHV)

Fig. 1: Parking Assist ECU Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE PROCEDURE 1. CHECK DTC OUTPUT a. Clear the DTCs. Refer to DTC CHECK / CLEAR . b. Check for DTCs. Refer to DTC CHECK / CLEAR . Result NOTE:  When "System initializing" message is displayed on the navigation receiver assembly after the battery terminal disconnected, correct the steering angle neutral point. Refer to INITIALIZATION .  Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the advanced parking guidance system may be needed. Refer to CALIBRATION . Result Proceed to DTC C1612 is output A No DTC is output B 2010 Toyota Prius 2010 ACCESSORIES & EQUIPMENT Advance Parking Guidance System (Diagnostic Codes & Circuit Tests) - Prius (Except PHV)

If the parking assist ECU cannot read the stored information when it is activated, allowing the ECU to store the information again may return the system to normal. B --> See step 4 A: Go to next step 2. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU IG VOLTAGE) a. Disconnect the L65 connector from the parking assist ECU. b. Measure the voltage according to the value(s) in the table below. Standard Voltage NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 3 3. REPLACE PARKING ASSIST ECU. Refer to REMOVAL 4. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING DTC C1613: ACC VOLTAGE IS LOW OR HIGH DESCRIPTION This DTC is stored if the parking assist ECU judges as a result of its self check that the voltage received by terminal ACC is not normal. WIRING DIAGRAM Tester Connection Condition Specified Condition L65-7 (IG) - L65-3 (GND1) Power switch on (IG) 11 to 14 V DTC No. DTC Detection Condition Trouble Area C1613  ACC voltage is low  ACC voltage is high  Harness or connector  Parking assist ECU 2010 Toyota Prius 2010 ACCESSORIES & EQUIPMENT Advance Parking Guidance System (Diagnostic Codes & Circuit Tests) - Prius (Except PHV)

Fig. 2: Parking Assist ECU Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE PROCEDURE 1. CHECK DTC OUTPUT a. Clear the DTCs. Refer to DTC CHECK / CLEAR . b. Check for DTCs. Refer to DTC CHECK / CLEAR . Result NOTE:  When "System initializing" message is displayed on the navigation receiver assembly after the battery terminal disconnected, correct the steering angle neutral point. Refer to INITIALIZATION .  Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the advanced parking guidance system may be needed. Refer to CALIBRATION . Result Proceed to DTC C1613 is output A No DTC is output B 2010 Toyota Prius 2010 ACCESSORIES & EQUIPMENT Advance Parking Guidance System (Diagnostic Codes & Circuit Tests) - Prius (Except PHV)

If the parking assist ECU cannot read the stored information when it is activated, allowing the ECU to store the information again may return the system to normal. B --> See step 4 A: Go to next step 2. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU ACC VOLTAGE) a. Disconnect the L65 connector from the parking assist ECU. b. Measure the voltage according to the value(s) in the table below. Standard Voltage NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 3 3. REPLACE PARKING ASSIST ECU. Refer to REMOVAL 4. USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING DTC C1621: BACK CAMERA POWER SUPPLY FAILURE; DTC C1622: OPEN OR SHORT CIRCUIT IN BACK CAMERA SIGNAL DESCRIPTION These DTCs are stored if the parking assist ECU judges as a result of its self check that the signals or signal lines between the parking assist ECU and rear television camera assembly are not normal. Tester Connection Condition Specified Condition L65-8 (ACC) - L65-3 (GND1) Power switch on (ACC) 11 to 14 V DTC No. DTC Detection Condition Trouble Area C1621 Rear television camera power supply failure  Harness or connector  Rear television camera assembly  Parking assist ECU C1622 An open or short in the rear television camera signal circuit  Harness or connector  Rear television camera assembly  Parking assist ECU 2010 Toyota Prius 2010 ACCESSORIES & EQUIPMENT Advance Parking Guidance System (Diagnostic Codes & Circuit Tests) - Prius (Except PHV)

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2012 Toyota Prius Service & Repair Manual

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