Intuitive Parking Assist System (Diagnostic Codes & Circuit Tests): Overview Lexus RX III

DESCRIPTION

The No. 1 ultrasonic sensor (front left sensor) is installed on the front bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (front left sensor). If the No. 1 ultrasonic sensor (front left sensor) has an open or other malfunction, it will not function normally.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

The No. 1 ultrasonic sensor (front left sensor) is installed on the front bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (front left sensor). If the No. 1 ultrasonic sensor (front left sensor) has an open or other malfunction, it will not function normally.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

The No. 1 ultrasonic sensor (front right sensor) is installed on the front bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (front right sensor). If the No. 1 ultrasonic sensor (front right sensor) has an open circuit or other malfunction, it will not function normally.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

The No. 1 ultrasonic sensor (front right sensor) is installed on the front bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (front right sensor). If the No. 1 ultrasonic sensor (front right sensor) has an open circuit or other malfunction, it will not function normally.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

The No. 1 ultrasonic sensor (rear left sensor) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (rear left sensor). If the No. 1 ultrasonic sensor (rear left sensor) has an open circuit or other malfunction, it will not function normally.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

The No. 1 ultrasonic sensor (rear left sensor) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (rear left sensor). If the No. 1 ultrasonic sensor (rear left sensor) has an open circuit or other malfunction, it will not function normally.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

The No. 1 ultrasonic sensor (rear left center sensor) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (rear left center sensor). If the No. 1 ultrasonic sensor (rear left center sensor) has an open circuit or other malfunction, it will not function normally.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

The No. 1 ultrasonic sensor (rear left center sensor) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (rear left center sensor). If the No. 1 ultrasonic sensor (rear left center sensor) has an open circuit or other malfunction, it will not function normally.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

The No. 1 ultrasonic sensor (rear right center sensor) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (rear right center sensor). If the No. 1 ultrasonic sensor (rear right center sensor) has an open circuit or other malfunction, it will not function normally.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

The No. 1 ultrasonic sensor (rear right center sensor) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (rear right center sensor). If the No. 1 ultrasonic sensor (rear right center sensor) has an open circuit or other malfunction, it will not function normally.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

The No. 1 ultrasonic sensor (rear right sensor) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (rear right sensor). If the No. 1 ultrasonic sensor (rear right sensor) has an open or other malfunction, it will not function normally.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

The No. 1 ultrasonic sensor (rear right sensor) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (rear right sensor). If the No. 1 ultrasonic sensor (rear right sensor) has an open or other malfunction, it will not function normally.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

This DTC is stored when there is an open or short circuit in the communication line between the front sensors and the ECU, or when there is a malfunction in a front sensor.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

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1. CHECK DTC OUTPUT (C1AEC) Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Recheck for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Result Result Proceed to DTC C1AEC is output (w/o Side Monitor System) A DTC C1AEC is output (w/ Side Monitor System) B No DTC is output C C --> See step 16 B --> See step 9 A: Go to next step
2. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - FRONT LEFT SENSOR) Disconnect the F52 connector from the clearance warning ECU. Disconnect the A12 connector from the No. 1 ultrasonic sensor. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F52-21 (BOF) - A12-1 (BI) Always Below 1 ohms F52-9 (SOF) - A12-3 (SI) F52-19 (E1) - A12-5 (EI) F52-21 (BOF) - Body ground 10 kohms or higher F52-9 (SOF) - Body ground F52-19 (E1) - Body ground TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Clearance Warning ECU) *2 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Front Left Sensor)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (FRONT LEFT SENSOR - FRONT RIGHT SENSOR) Disconnect the A12 and A13 connectors from the No. 1 ultrasonic sensors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A12-2 (BO) - A13-1 (BI) Always Below 1 ohms A12-4 (SO) - A13-3 (SI) A12-6 (EO) - A13-5 (EI) A12-2 (BO) - Body ground 10 kohms or higher A12-4 (SO) - Body ground A12-6 (EO) - Body ground TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Front Left Sensor)) *2 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Front Right Sensor)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR) Remove the No. 1 ultrasonic sensor (front left sensor). Refer to «REMOVAL»(ref-400911-S04005878152011051800000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (BI) - 5 (EI) Always 10 kohms or higher 1 (BI) - 2 (BO) Always 10 kohms or higher 3 (SI) - 4 (SO) Always Below 1 ohms 5 (EI) - 6 (EO) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (No. 1 Ultrasonic Sensor (Front Left Sensor)) NG --> See step 17 OK: Go to next step
5. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR) See step 2 NEXT: Go to next step
6. CHECK DTC OUTPUT (C1AEC) Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Result Result Proceed to DTC C1AEC is output A No DTC is output B B --> END (FRONT LEFT SENSOR WAS DEFECTIVE) A: Go to next step
7. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT RIGHT SENSOR) See step 2 NEXT: Go to next step
8. CHECK DTC OUTPUT (C1AEC) Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Result Result Proceed to DTC C1AEC is output A No DTC is output B B --> END (FRONT RIGHT SENSOR WAS DEFECTIVE) A --> See step 18
9. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - FRONT LEFT SENSOR) Disconnect the F55 connector from the parking assist ECU. Disconnect the A12 connector from the No. 1 ultrasonic sensor. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F55-1 (CSB1) - A12-1 (BI) Always Below 1 ohms F55-3 (LIN1) - A12-3 (SI) F55-2 (CSG1) - A12-5 (EI) F55-1 (CSB1) - Body ground 10 kohms or higher F55-3 (LIN1) - Body ground F55-2 (CSG1) - Body ground TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Parking Assist ECU) *2 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Front Left Sensor)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
10. CHECK HARNESS AND CONNECTOR (FRONT LEFT SENSOR - FRONT RIGHT SENSOR) Disconnect the A12 and A13 connectors from the No. 1 ultrasonic sensors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A12-2 (BO) - A13-1 (BI) Always Below 1 ohms A12-4 (SO) - A13-3 (SI) A12-6 (EO) - A13-5 (EI) A12-2 (BO) - Body ground 10 kohms or higher A12-4 (SO) - Body ground A12-6 (EO) - Body ground TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Front Left Sensor)) *2 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Front Right Sensor)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
11. CHECK NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR) Remove the No. 1 ultrasonic sensor (front left sensor). Refer to «REMOVAL»(ref-400911-S04005878152011051800000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (BI) - 5 (EI) Always 10 kohms or higher 1 (BI) - 2 (BO) Always 10 kohms or higher 3 (SI) - 4 (SO) Always Below 1 ohms 5 (EI) - 6 (EO) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (No. 1 Ultrasonic Sensor (Front Left Sensor)) NG --> See step 17 OK: Go to next step
12. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR) See step 2 NEXT: Go to next step
13. CHECK DTC OUTPUT (C1AEC) Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Result Result Proceed to DTC C1AEC is output A No DTC is output B B --> END (FRONT LEFT SENSOR WAS DEFECTIVE) A: Go to next step
14. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT RIGHT SENSOR) See step 2 NEXT: Go to next step
15. CHECK DTC OUTPUT (C1AEC) Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Result Result Proceed to DTC C1AEC is output A No DTC is output B B --> END (FRONT RIGHT SENSOR WAS DEFECTIVE) A --> See step 19
16. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-400649-S11887826212011051800000)
17. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR). Refer to «REMOVAL»(ref-400911-S04005878152011051800000)
18. REPLACE CLEARANCE WARNING ECU. Refer to «REMOVAL»(ref-400911-S38232578752011051800000)
19. REPLACE PARKING ASSIST ECU. Refer to «REMOVAL»(ref-400911-S29384521242011051800000)

This DTC is stored when there is an open or short circuit in the communication line between the front sensors and the ECU, or when there is a malfunction in a front sensor.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

This DTC is stored when there is an open or short circuit in the communication line between the rear sensors and the ECU, or when there is a malfunction in a rear sensor.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

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1. CHECK DTC OUTPUT (C1AED) Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Recheck for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Result Result Proceed to DTC C1AED is output (w/o Side Monitor System) A DTC C1AED is output (w/ Side Monitor System) B No DTC is output C C --> See step 32 B --> See step 17 A: Go to next step
2. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - REAR RIGHT SENSOR) Disconnect the F52 connector from the clearance warning ECU. Disconnect the X1 connector from the No. 1 ultrasonic sensor. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F52-7 (BOR) - X1-1 (BI) Always Below 1 ohms F52-24 (SOR) - X1-3 (SI) F52-18 (E2) - X1-5 (EI) F52-7 (BOR) - Body ground 10 kohms or higher F52-24 (SOR) - Body ground F52-18 (E2) - Body ground TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Clearance Warning ECU) *2 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Rear Right Sensor)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (REAR RIGHT SENSOR - REAR RIGHT CENTER SENSOR) Disconnect the X1 and X2 connectors from the No. 1 ultrasonic sensors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition X1-2 (BO) - X2-1 (BI) Always Below 1 ohms X1-4 (SO) - X2-3 (SI) X1-6 (EO) - X2-5 (EI) X1-2 (BO) - Body ground 10 kohms or higher X1-4 (SO) - Body ground X1-6 (EO) - Body ground TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Rear Right Sensor)) *2 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Rear Right Center Sensor)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (REAR RIGHT CENTER SENSOR - REAR LEFT CENTER SENSOR) Disconnect the X2 and X3 connectors from the No. 1 ultrasonic sensors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition X2-2 (BO) - X3-1 (BI) Always Below 1 ohms X2-4 (SO) - X3-3 (SI) X2-6 (EO) - X3-5 (EI) X2-2 (BO) - Body ground 10 kohms or higher X2-4 (SO) - Body ground X2-6 (EO) - Body ground TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Rear Right Center Sensor)) *2 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Rear Left Center Sensor)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (REAR LEFT CENTER SENSOR - REAR LEFT SENSOR) Disconnect the X3 and X4 connectors from the No. 1 ultrasonic sensors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition X3-2 (BO) - X4-1 (BI) Always Below 1 ohms X3-4 (SO) - X4-3 (SI) X3-6 (EO) - X4-5 (EI) X3-2 (BO) - Body ground 10 kohms or higher X3-4 (SO) - Body ground X3-6 (EO) - Body ground TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Rear Left Center Sensor)) *2 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Rear Left Sensor)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. CHECK NO. 1 ULTRASONIC SENSOR (REAR RIGHT SENSOR) Remove the No. 1 ultrasonic sensor (rear right sensor). Refer to «REMOVAL»(ref-400911-S35379922152011051800000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (BI) - 5 (EI) Always 10 kohms or higher 1 (BI) - 2 (BO) Always 10 kohms or higher 3 (SI) - 4 (SO) Always Below 1 ohms 5 (EI) - 6 (EO) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (No. 1 Ultrasonic Sensor (Rear Right Sensor)) NG --> See step 33 OK: Go to next step
7. CHECK NO. 1 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR) Remove the No. 1 ultrasonic sensor (rear right center sensor). Refer to «REMOVAL»(ref-400911-S35379922152011051800000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (BI) - 5 (EI) Always 10 kohms or higher 1 (BI) - 2 (BO) Always 10 kohms or higher 3 (SI) - 4 (SO) Always Below 1 ohms 5 (EI) - 6 (EO) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (No. 1 Ultrasonic Sensor (Rear Right Center Sensor)) NG --> See step 34 OK: Go to next step
8. CHECK NO. 1 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR) Remove the No. 1 ultrasonic sensor (rear left center sensor). Refer to «REMOVAL»(ref-400911-S35379922152011051800000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (BI) - 5 (EI) Always 10 kohms or higher 1 (BI) - 2 (BO) Always 10 kohms or higher 3 (SI) - 4 (SO) Always Below 1 ohms 5 (EI) - 6 (EO) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (No. 1 Ultrasonic Sensor (Rear Left Center Sensor)) NG --> See step 35 OK: Go to next step
9. REPLACE NO. 1 ULTRASONIC SENSOR (REAR RIGHT SENSOR) See step 2 NEXT: Go to next step
10. CHECK DTC OUTPUT (C1AED) Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Result Result Proceed to DTC C1AED is output A No DTC is output B B --> END (REAR RIGHT SENSOR WAS DEFECTIVE) A: Go to next step
11. REPLACE NO. 1 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR) See step 2 NEXT: Go to next step
12. CHECK DTC OUTPUT (C1AED) Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Result Result Proceed to DTC C1AED is output A No DTC is output B B --> END (REAR RIGHT CENTER SENSOR WAS DEFECTIVE) A: Go to next step
13. REPLACE NO. 1 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR) See step 2 NEXT: Go to next step
14. CHECK DTC OUTPUT (C1AED) Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Result Result Proceed to DTC C1AED is output A No DTC is output B B --> END (REAR LEFT CENTER SENSOR WAS DEFECTIVE) A: Go to next step
15. REPLACE NO. 1 ULTRASONIC SENSOR (REAR LEFT SENSOR) See step 2 NEXT: Go to next step
16. CHECK DTC OUTPUT (C1AED) Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Result Result Proceed to DTC C1AED is output A No DTC is output B B --> END (REAR LEFT SENSOR WAS DEFECTIVE) A --> See step 36
17. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - REAR RIGHT SENSOR) Disconnect the F55 connector from the parking assist ECU. Disconnect the X1 connector from the No. 1 ultrasonic sensor. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F55-7 (CSB2) - X1-1 (BI) Always Below 1 ohms F55-9 (LIN2) - X1-3 (SI) F55-8 (CSG2) - X1-5 (EI) F55-7 (CSB2) - Body ground 10 kohms or higher F55-9 (LIN2) - Body ground F55-8 (CSG2) - Body ground TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Parking Assist ECU) *2 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Rear Right Sensor)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
18. CHECK HARNESS AND CONNECTOR (REAR RIGHT SENSOR - REAR RIGHT CENTER SENSOR) Disconnect the X1 and X2 connectors from the No. 1 ultrasonic sensors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition X1-2 (BO) - X2-1 (BI) Always Below 1 ohms X1-4 (SO) - X2-3 (SI) X1-6 (EO) - X2-5 (EI) X1-2 (BO) - Body ground 10 kohms or higher X1-4 (SO) - Body ground X1-6 (EO) - Body ground TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Rear Right Sensor)) *2 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Rear Right Center Sensor)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
19. CHECK HARNESS AND CONNECTOR (REAR RIGHT CENTER SENSOR - REAR LEFT CENTER SENSOR) Disconnect the X2 and X3 connectors from the No. 1 ultrasonic sensors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition X2-2 (BO) - X3-1 (BI) Always Below 1 ohms X2-4 (SO) - X3-3 (SI) X2-6 (EO) - X3-5 (EI) X2-2 (BO) - Body ground 10 kohms or higher X2-4 (SO) - Body ground X2-6 (EO) - Body ground TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Rear Right Center Sensor)) *2 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Rear Left Center Sensor)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
20. CHECK HARNESS AND CONNECTOR (REAR LEFT CENTER SENSOR - REAR LEFT SENSOR) Disconnect the X3 and X4 connectors from the No. 1 ultrasonic sensors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition X3-2 (BO) - X4-1 (BI) Always Below 1 ohms X3-4 (SO) - X4-3 (SI) X3-6 (EO) - X4-5 (EI) X3-2 (BO) - Body ground 10 kohms or higher X3-4 (SO) - Body ground X3-6 (EO) - Body ground TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Rear Left Center Sensor)) *2 Front view of wire harness connector (to No. 1 Ultrasonic Sensor (Rear Left Sensor)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
21. CHECK NO. 1 ULTRASONIC SENSOR (REAR RIGHT SENSOR) Remove the No. 1 ultrasonic sensor (rear right sensor). Refer to «REMOVAL»(ref-400911-S35379922152011051800000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (BI) - 5 (EI) Always 10 kohms or higher 1 (BI) - 2 (BO) Always 10 kohms or higher 3 (SI) - 4 (SO) Always Below 1 ohms 5 (EI) - 6 (EO) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (No. 1 Ultrasonic Sensor (Rear Right Sensor)) NG --> See step 33 OK: Go to next step
22. CHECK NO. 1 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR) Remove the No. 1 ultrasonic sensor (rear right center sensor). Refer to «REMOVAL»(ref-400911-S35379922152011051800000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (BI) - 5 (EI) Always 10 kohms or higher 1 (BI) - 2 (BO) Always 10 kohms or higher 3 (SI) - 4 (SO) Always Below 1 ohms 5 (EI) - 6 (EO) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (No. 1 Ultrasonic Sensor (Rear Right Center Sensor)) NG --> See step 34 OK: Go to next step
23. CHECK NO. 1 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR) Remove the No. 1 ultrasonic sensor (rear left center sensor). Refer to «REMOVAL»(ref-400911-S35379922152011051800000) . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (BI) - 5 (EI) Always 10 kohms or higher 1 (BI) - 2 (BO) Always 10 kohms or higher 3 (SI) - 4 (SO) Always Below 1 ohms 5 (EI) - 6 (EO) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (No. 1 Ultrasonic Sensor (Rear Left Center Sensor)) NG --> See step 35 OK: Go to next step
24. REPLACE NO. 1 ULTRASONIC SENSOR (REAR RIGHT SENSOR) See step 2 NEXT: Go to next step
25. CHECK DTC OUTPUT (C1AED) Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Result Result Proceed to DTC C1AED is output A No DTC is output B B --> END (REAR RIGHT SENSOR WAS DEFECTIVE) A: Go to next step
26. REPLACE NO. 1 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR) See step 2 NEXT: Go to next step
27. CHECK DTC OUTPUT (C1AED) Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Result Result Proceed to DTC C1AED is output A No DTC is output B B --> END (REAR RIGHT CENTER SENSOR WAS DEFECTIVE) A: Go to next step
28. REPLACE NO. 1 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR) See step 2 NEXT: Go to next step
29. CHECK DTC OUTPUT (C1AED) Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Result Result Proceed to DTC C1AED is output A No DTC is output B B --> END (REAR LEFT CENTER SENSOR WAS DEFECTIVE) A: Go to next step
30. REPLACE NO. 1 ULTRASONIC SENSOR (REAR LEFT SENSOR) See step 2 NEXT: Go to next step
31. CHECK DTC OUTPUT (C1AED) Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400915-S32230040162011051800000) . Result Result Proceed to DTC C1AED is output A No DTC is output B B --> END (REAR LEFT SENSOR WAS DEFECTIVE) A --> See step 37
32. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-400649-S11887826212011051800000)
33. REPLACE NO. 1 ULTRASONIC SENSOR (REAR RIGHT SENSOR). Refer to «REMOVAL»(ref-400911-S35379922152011051800000)
34. REPLACE NO. 1 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR). Refer to «REMOVAL»(ref-400911-S35379922152011051800000)
35. REPLACE NO. 1 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR). Refer to «REMOVAL»(ref-400911-S35379922152011051800000)
36. REPLACE CLEARANCE WARNING ECU. Refer to «REMOVAL»(ref-400911-S38232578752011051800000)
37. REPLACE PARKING ASSIST ECU. Refer to «REMOVAL»(ref-400911-S29384521242011051800000)

This DTC is stored when there is an open or short circuit in the communication line between the rear sensors and the ECU, or when there is a malfunction in a rear sensor.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

This DTC is stored when the clearance warning ECU*1 or parking assist ECU*2 can not receive and recognize several signals via the CAN communication system.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

HINT

When 2 or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harness of each ECU.

This DTC is stored when the clearance warning ECU*1 or parking assist ECU*2 can not receive and recognize several signals via the CAN communication system.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

HINT

When 2 or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harness of each ECU.

These DTCs are stored when the clearance warning ECU*1 or parking assist ECU*2 can not receive and recognize several signals via the CAN communication system.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

HINT

When 2 or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harness of each ECU.

These DTCs are stored when the clearance warning ECU*1 or parking assist ECU*2 can not receive and recognize several signals via the CAN communication system.

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System

HINT

When 2 or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harness of each ECU.

The clearance warning buzzer is an ECU-excited buzzer that sounds when it receives a pulsed digital pattern from the ECU. The ECU operates the buzzer using a sound pattern that changes depending on the distance to the obstacle.

Scheme 87

Scheme 88

Scheme 89

1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the intuitive parking assist system on. Turn the Techstream on. Enter the following menus: Body Electrical / Intuitive P/A / Active Test. Check that the buzzer operates by performing the Active Test. INTUITIVE P/A Tester Display Test Part Control Range Diagnostic Note Buzzer Clearance warning buzzer Operate or Stop Confirm that the vehicle is stopped and the engine switch is on (IG) Result Result Proceed to The clearance warning buzzer sounds A The clearance warning buzzer does not sound (w/o Side Monitor System) B The clearance warning buzzer does not sound (w/ Side Monitor System) C C --> See step 5 B --> See step 2 A --> See step 8
2. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - CLEARANCE WARNING BUZZER) Disconnect the F52 connector from the clearance warning ECU. Disconnect the F27 connector from the clearance warning buzzer. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F52-10 (BBZ) - F27-1 (Z+) Always Below 1 ohms F52-11 (EF) - F27-2 (Z-) Always Below 1 ohms F52-10 (BBZ) - Body ground Always 10 kohms or higher F52-11 (EF) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Clearance Warning ECU) *2 Front view of wire harness connector (to Clearance Warning Buzzer) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. REPLACE CLEARANCE WARNING BUZZER Replace the clearance warning buzzer with a new or normally functioning one. Refer to «REMOVAL»(ref-400911-S01499140392011051800000) . NEXT: Go to next step
4. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the intuitive parking assist system on. Turn the Techstream on. Enter the following menus: Body Electrical / Intuitive P/A / Active Test. Check that the buzzer operates by performing the Active Test. INTUITIVE P/A Tester Display Test Part Control Range Diagnostic Note Buzzer Clearance warning buzzer Operate or Stop Confirm that the vehicle is stopped and the engine switch is on (IG) OK The clearance warning buzzer sounds. NG --> See step 9 OK --> END (CLEARANCE WARNING BUZZER WAS DEFECTIVE)
5. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - CLEARANCE WARNING BUZZER) Disconnect the F54 connector from the parking assist ECU. Disconnect the F27 connector from the clearance warning buzzer. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F54-18 (BBZ) - F27-1 (Z+) Always Below 1 ohms F54-17 (EF) - F27-2 (Z-) Always Below 1 ohms F54-18 (BBZ) - Body ground Always 10 kohms or higher F54-17 (EF) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Parking Assist ECU) *2 Front view of wire harness connector (to Clearance Warning Buzzer) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. REPLACE CLEARANCE WARNING BUZZER Replace the clearance warning buzzer with a new or normally functioning one. Refer to «REMOVAL»(ref-400911-S01499140392011051800000) . NEXT: Go to next step
7. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the intuitive parking assist system on. Turn the Techstream on. Enter the following menus: Body Electrical / Intuitive P/A / Active Test. Check that the buzzer operates by performing the Active Test. INTUITIVE P/A Tester Display Test Part Control Range Diagnostic Note Buzzer Clearance warning buzzer Operate or Stop Confirm that the vehicle is stopped and the engine switch is on (IG) OK The clearance warning buzzer sounds. NG --> See step 10 OK --> END (CLEARANCE WARNING BUZZER WAS DEFECTIVE)
8. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400915-S33196995332011051800000)
9. REPLACE CLEARANCE WARNING ECU. Refer to «REMOVAL»(ref-400911-S38232578752011051800000)
10. REPLACE PARKING ASSIST ECU. Refer to «REMOVAL»(ref-400911-S29384521242011051800000)

The clearance warning buzzer is an ECU-excited buzzer that sounds when it receives a pulsed digital pattern from the ECU. The ECU operates the buzzer using a sound pattern that changes depending on the distance to the obstacle.

This circuit provides power to operate the clearance warning ECU.

Scheme 90

Scheme 91

Scheme 92

1. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - BATTERY) Disconnect the F52 connector from the clearance warning ECU. Measure the voltage according to the value(s) on the table below. Standard Voltage Tester Connection Condition Specified Condition F52-15 (IG) - Body ground Engine switch on (IG) 11 to 14 V F52-15 (IG) - Body ground Engine switch off Below 1 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Clearance Warning ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F52-17 (E) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Clearance Warning ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 3
3. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-400915-S33196995332011051800000)

This circuit provides power to operate the clearance warning ECU.