Intuitive Parking Assist System (Diagnostic Codes & Circuit Tests): Overview Lexus LX J200 рестайлинг

DESCRIPTION

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

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

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

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

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

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

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.

Scheme 75

Scheme 76

1. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . OK DTC C1AEC is not output. NG --> See step 2 OK --> See step 11
2. CHECK HARNESS AND CONNECTOR (NO. 1 ULTRASONIC SENSOR [FL SENSOR] - PARKING ASSIST ECU) Disconnect the B6 No. 1 ultrasonic sensor (FL sensor) connector. Disconnect the F63 parking assist ECU connector. Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Tester Connection Condition Specified Condition B6-1 (BI) - F63-5 (CSB1) Always Below 1 ohms B6-3 (SI) - F63-23 (LIN1) Always Below 1 ohms B6-5 (EI) - F63-6 (CSG1) Always Below 1 ohms B6-1 (BI) - Body ground Always 10 kohms or higher B6-3 (SI) - Body ground Always 10 kohms or higher B6-5 (EI) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (NO. 1 ULTRASONIC SENSOR [FL SENSOR] - NO. 1 ULTRASONIC SENSOR [FR SENSOR]) Disconnect the B6 No. 1 ultrasonic sensor (FL sensor) connector. Disconnect the B5 No. 1 ultrasonic sensor (FR sensor) connector. Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Tester Connection Condition Specified Condition B6-2 (BO) - B5-1 (BI) Always Below 1 ohms B6-4 (SO) - B5-3 (SI) Always Below 1 ohms B6-6 (EO) - B5-5 (EI) Always Below 1 ohms B6-2 (BO) - Body ground Always 10 kohms or higher B6-4 (SO) - Body ground Always 10 kohms or higher B6-6 (EO) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK PARKING ASSIST ECU Measure the voltage according to the value(s) in the table below. STANDARD VOLTAGE Tester Connection Switch Condition Specified Condition F63-5 (CSB1) - Body ground Engine switch on (IG) 7.2 to 8.8 V Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Tester Connection Condition Specified Condition F63-6 (CSG1) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *a Component with harness connected (Parking Assist ECU) NG --> See step 10 OK: Go to next step
5. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . OK DTC C1AEC is not output. NG --> See step 6 OK --> See step 12
6. REPLACE NO. 1 ULTRASONIC SENSOR (FL SENSOR) Replace the No. 1 ultrasonic sensor (FL sensor) with a normally functioning one. Refer to «REMOVAL [01/2012 - ]»(ref-604004-S26332328322014031100000) . NEXT: Go to next step
7. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . OK DTC C1AEC is not output. NG --> See step 8 OK --> END (NO. 1 ULTRASONIC SENSOR [FL SENSOR] IS DEFECTIVE)
8. REPLACE NO. 1 ULTRASONIC SENSOR (FR SENSOR) Replace the No. 1 ultrasonic sensor (FR sensor) with a normally functioning one. Refer to «REMOVAL [01/2012 - ]»(ref-604004-S26332328322014031100000) . NEXT: Go to next step
9. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . OK DTC C1AEC is not output. NG --> See step 13 OK --> END (NO. 1 ULTRASONIC SENSOR [FR SENSOR] IS DEFECTIVE)
10. REPLACE PARKING ASSIST ECU. Refer to «REMOVAL [01/2012 - ]»(ref-604004-S10793473162014031100000)
11. USE SIMULATION METHOD TO CHECK. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE [01/2012 - ]»(ref-603789-S26835722402014031100000)
12. USE SIMULATION METHOD TO CHECK. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE [01/2012 - ]»(ref-603789-S26835722402014031100000)
13. REPLACE PARKING ASSIST ECU. Refer to «REMOVAL [01/2012 - ]»(ref-604004-S10793473162014031100000)

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.

Scheme 77

Scheme 78

1. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . OK DTC C1AED is not output. B --> See step 17 A: Go to next step
2. CHECK HARNESS AND CONNECTOR (NO. 1 ULTRASONIC SENSOR [RR SENSOR] - PARKING ASSIST ECU) Disconnect the O5 No. 1 ultrasonic sensor (RR sensor) connector. Disconnect the F63 parking assist ECU connector. Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Tester Connection Condition Specified Condition O5-1 (BI) - F63-20 (CSB2) Always Below 1 ohms O5-3 (SI) - F63-3 (LIN2) Always Below 1 ohms O5-5 (EI) - F63-4 (CSG2) Always Below 1 ohms O5-1 (BI) - Body ground Always 10 kohms or higher O5-3 (SI) - Body ground Always 10 kohms or higher O5-5 (EI) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (NO. 1 ULTRASONIC SENSOR [RR SENSOR] - NO. 1 ULTRASONIC SENSOR [RRC SENSOR]) Disconnect the O5 No. 1 ultrasonic sensor (RR sensor) connector. Disconnect the O6 No. 1 ultrasonic sensor (RRC sensor) connector. Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Tester Connection Condition Specified Condition O5-2 (BO) - O6-1 (BI) Always Below 1 ohms O5-4 (SO) - O6-3 (SI) Always Below 1 ohms O5-6 (EO) - O6-5 (EI) Always Below 1 ohms O5-2 (BO) - Body ground Always 10 kohms or higher O5-4 (SO) - Body ground Always 10 kohms or higher O5-6 (EO) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (NO. 1 ULTRASONIC SENSOR [RRC SENSOR] - NO. 1 ULTRASONIC SENSOR [RLC SENSOR]) Disconnect the O6 No. 1 ultrasonic sensor (RRC sensor) connector. Disconnect the O7 No. 1 ultrasonic sensor (RLC sensor) connector. Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Tester Connection Condition Specified Condition O6-2 (BO) - O7-1 (BI) Always Below 1 ohms O6-4 (SO) - O7-3 (SI) Always Below 1 ohms O6-6 (EO) - O7-5 (EI) Always Below 1 ohms O6-2 (BO) - Body ground Always 10 kohms or higher O6-4 (SO) - Body ground Always 10 kohms or higher O6-6 (EO) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
5. CHECK HARNESS AND CONNECTOR (NO. 1 ULTRASONIC SENSOR [RLC SENSOR] - NO. 1 ULTRASONIC SENSOR [RL SENSOR]) Disconnect the O7 No. 1 ultrasonic sensor (RLC sensor) connector. Disconnect the O8 No. 1 ultrasonic sensor (RL sensor) connector. Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Tester Connection Condition Specified Condition O7-2 (BO) - O8-1 (BI) Always Below 1 ohms O7-4 (SO) - O8-3 (SI) Always Below 1 ohms O7-6 (EO) - O8-5 (EI) Always Below 1 ohms O7-2 (BO) - Body ground Always 10 kohms or higher O7-4 (SO) - Body ground Always 10 kohms or higher O7-6 (EO) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
6. CHECK PARKING ASSIST ECU Measure the voltage according to the value(s) in the table below. STANDARD VOLTAGE Tester Connection Switch Condition Specified Condition F63-20 (CSB2) - Body ground Engine switch on (IG) 7.2 to 8.8 V Measure the resistance according to the value(s) in the table below. STANDARD RESISTANCE Tester Connection Condition Specified Condition F63-4 (CSG2) - Body ground Always Below 1 ohms NG --> See step 16 OK: Go to next step
7. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . RESULT Result Proceed to DTC C1AED is output and multi-information display indicates open circuit (Rear Left and Rear Center) A DTC C1AED is output and multi-information display indicates open circuit (Rear Left, Rear Center and Rear Right) B DTC C1AED is not output C B --> See step 12 C --> See step 18 A: Go to next step
8. REPLACE NO. 1 ULTRASONIC SENSOR (RR SENSOR) Replace the No. 1 ultrasonic sensor (RR sensor) with a normally functioning one. Refer to «REMOVAL [01/2012 - ]»(ref-604004-S10460853592014031100000) . NEXT: Go to next step
9. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . RESULT Result Proceed to DTC C1AED is output and multi-information display indicates open circuit (rear left, rear center and rear right) A DTC C1AED is output and multi-information display indicates open circuit (rear left and rear center) B DTC C1AED is not output C B --> See step 12 C --> END (NO. 1 ULTRASONIC SENSOR [RR SENSOR] IS DEFECTIVE) A: Go to next step
10. REPLACE NO. 1 ULTRASONIC SENSOR (RL SENSOR) Replace the No. 1 ultrasonic sensor (RL sensor) with a normally functioning one. Refer to «REMOVAL [01/2012 - ]»(ref-604004-S10460853592014031100000) . NEXT: Go to next step
11. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . RESULT Result Proceed to DTC C1AED is output and multi-information display indicates open circuit (rear left and rear center) A DTC C1AED is output and multi-information display indicates open circuit (rear left, rear center and rear right) B DTC C1AED is not output C B --> See step 20 C --> END (NO. 1 ULTRASONIC SENSOR [RL SENSOR] IS DEFECTIVE) A: Go to next step
12. REPLACE NO. 1 ULTRASONIC SENSOR (RRC SENSOR) Replace the No. 1 ultrasonic sensor (RRC sensor) with a normally functioning one. Refer to «REMOVAL [01/2012 - ]»(ref-604004-S10460853592014031100000) . NEXT: Go to next step
13. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . OK DTC C1AED is not output. NG --> See step 14 OK --> END (NO. 1 ULTRASONIC SENSOR [RRC SENSOR] IS DEFECTIVE)
14. REPLACE NO. 1 ULTRASONIC SENSOR (RLC SENSOR) Replace the No. 1 ultrasonic sensor (RLC sensor) with a normally functioning one. Refer to «REMOVAL [01/2012 - ]»(ref-604004-S10460853592014031100000) . NEXT: Go to next step
15. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . Check for DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]»(ref-604008-S28685638302014031100000) . OK DTC C1AED is not output. NG --> See step 19 OK --> END (NO. 1 ULTRASONIC SENSOR [RLC SENSOR] IS DEFECTIVE)
16. REPLACE PARKING ASSIST ECU. Refer to «REMOVAL [01/2012 - ]»(ref-604004-S10793473162014031100000)
17. USE SIMULATION METHOD TO CHECK. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE [01/2012 - ]»(ref-603789-S26835722402014031100000)
18. USE SIMULATION METHOD TO CHECK. Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE [01/2012 - ]»(ref-603789-S26835722402014031100000)
19. REPLACE PARKING ASSIST ECU. Refer to «REMOVAL [01/2012 - ]»(ref-604004-S10793473162014031100000)
20. REPLACE PARKING ASSIST ECU. Refer to «REMOVAL [01/2012 - ]»(ref-604004-S10793473162014031100000)

This DTC is stored when a problem with the shift position information sent through the CAN communication system is detected.

When the clearance warning ECU self-diagnosis determines that the CAN communication system is malfunctioning, this DTC is stored.

HINT

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

When the back sonar or clearance sonar switch assembly turns on, the ON signal is input into the parking assist ECU.

Scheme 79

The No. 1 clearance warning buzzer sounds to alert the driver and the buzzed frequency changes depending on the distance to an obstacle.

Scheme 80