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

DESCRIPTION

The No. 3 ultrasonic sensor (front left sensor) is installed on the front bumper.

The clearance warning ECU detects obstacles based on signals received from the front left sensor. If the front left sensor's circuit has an open, short or other malfunction, it will not function normally.

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1. INSPECT NO. 3 ULTRASONIC SENSOR Remove the No. 3 ultrasonic sensor. Measure the resistance of the sensor. Standard resistance Tester Connection [tester (+) - tester (-)] Specified Condition 3 (S) - 2 (E) 40 +-10 kohms 2 (E) - 3 (S) 40 +-10 kohms 1 (T) - 2 (E)* 330 +-100 kohms 2 (E) - 1 (T)* 1 Mohms or higher NOTE: Set the tester to the 100 kohms range before performing the measurement. *: Measurement values may vary depending on the tester used. If results seem inaccurate, reverse the polarity (+-) and measure again. NG --> REPLACE NO. 3 ULTRASONIC SENSOR (FRONT LEFT SENSOR) OK: Go to next step
2. CHECK WIRE HARNESS (CLEARANCE WARNING ECU - NO. 3 ULTRASONIC SENSOR) Disconnect the A38 ECU connector. Disconnect the D2 sensor connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition A38-7 (S4) - D2-3 (S) Below 1 ohms A38-21 (T4) - D2-1 (T) Below 1 ohms A38-14 (EF) - D2-2 (E) Below 1 ohms A38-7 (S4) - Body ground 1 Mohms or higher A38-21 (T4) - Body ground 1 Mohms or higher A38-14 (EF) - Body ground 1 Mohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE CLEARANCE WARNING ECU

The No. 3 ultrasonic sensor (front left center sensor) is installed on the front bumper.

The clearance warning ECU detects obstacles based on signals received from the front left center sensor. If the front left center sensor's circuit has an open, short or other malfunction, it will not function normally.

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1. INSPECT NO. 3 ULTRASONIC SENSOR Remove the No. 3 ultrasonic sensor. Measure the resistance of the sensor. Standard resistance Tester Connection [tester (+) - tester (-)] Specified Condition 3 (S) - 2 (E) 40 +-10 kohms 2 (E) - 3 (S) 40 +-10 kohms 1 (T) - 2 (E)* 330 +-100 kohms 2 (E) - 1 (T)* 1 Mohms or higher NOTE: Set the tester to the 100 kohms range before performing the measurement. *: Measurement values may vary depending on the tester used. If results seem inaccurate, reverse the polarity (+-) and measure again. NG --> REPLACE NO. 3 ULTRASONIC SENSOR (FRONT LEFT CENTER SENSOR) OK: Go to next step
2. CHECK WIRE HARNESS (CLEARANCE WARNING ECU - NO. 3 ULTRASONIC SENSOR) Disconnect the A38 ECU connector. Disconnect the D4 sensor connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition A38-5 (S3) - D4-3 (S) Below 1 ohms A38-6 (T3) - D4-1 (T) Below 1 ohms A38-14 (EF) - D4-2 (E) Below 1 ohms A38-5 (S3) - Body ground 1 Mohms or higher A38-6 (T3) - Body ground 1 Mohms or higher A38-14 (EF) - Body ground 1 Mohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE CLEARANCE WARNING ECU

The No. 3 ultrasonic sensor (front right center sensor) is installed on the front bumper.

The clearance warning ECU detects obstacles based on signals received from the front right center sensor. If the front right center sensor's circuit has an open, short or other malfunction, it will not function normally.

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1. INSPECT NO. 3 ULTRASONIC SENSOR Remove the No. 3 ultrasonic sensor. Measure the resistance of the sensor. Standard resistance Tester Connection [tester (+) - tester (-)] Specified Condition 3 (S) - 2 (E) 40 +-10 kohms 2 (E) - 3 (S) 40 +-10 kohms 1 (T) - 2 (E)* 330 +-100 kohms 2 (E) - 1 (T)* 1 Mohms or higher NOTE: Set the tester to the 100 kohms range before performing the measurement. *: Measurement values may vary depending on the tester used. If results seem inaccurate, reverse the polarity (+-) and measure again. NG --> REPLACE NO. 3 ULTRASONIC SENSOR (FRONT RIGHT CENTER SENSOR) OK: Go to next step
2. CHECK WIRE HARNESS (CLEARANCE WARNING ECU - NO. 3 ULTRASONIC SENSOR) Disconnect the A38 ECU connector. Disconnect the D3 sensor connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition A38-3 (S2) - D3-3 (S) Below 1 ohms A38-4 (T2) - D3-1 (T) Below 1 ohms A38-14 (EF) - D3-2 (E) Below 1 ohms A38-4 (T2) - Body ground 1 Mohms or higher A38-3 (S2) - Body ground 1 Mohms or higher A38-14 (EF) - Body ground 1 Mohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE CLEARANCE WARNING ECU

The No. 3 ultrasonic sensor (front right sensor) is installed on the front bumper.

The clearance warning ECU detects obstacles based on signals received from the front right sensor. If the front right sensor's circuit has an open, short or other malfunction, it will not function normally.

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1. INSPECT NO. 3 ULTRASONIC SENSOR Remove the No. 3 ultrasonic sensor. Measure the resistance of the sensor. Standard resistance Tester Connection [tester (+) - tester (-)] Specified Condition 3 (S) - 2 (E) 40 +-10 kohms 2 (E) - 3 (S) 40 +-10 kohms 1 (T) - 2 (E)* 330 +-100 kohms 2 (E) - 1 (T)* 1 Mohms or higher NOTE: Set the tester to the 100 kohms range before performing the measurement. *: Measurement values may vary depending on the tester used. If results seem inaccurate, reverse the polarity (+-) and measure again. NG --> REPLACE NO. 3 ULTRASONIC SENSOR (FRONT RIGHT SENSOR) OK: Go to next step
2. CHECK WIRE HARNESS (CLEARANCE WARNING ECU - NO. 3 ULTRASONIC SENSOR) Disconnect the A38 ECU connector. Disconnect the D1 sensor connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition A38-1 (S1) - D1-3 (S) Below 1 ohms A38-2 (T1) - D1-1 (T) Below 1 ohms A38-14 (EF) - D1-2 (E) Below 1 ohms A38-1 (S1) - Body ground 1 Mohms or higher A38-2 (T1) - Body ground 1 Mohms or higher A38-14 (EF) - Body ground 1 Mohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE CLEARANCE WARNING ECU

The No. 1 ultrasonic sensor (rear left sensor) is installed on the rear bumper.

The clearance warning ECU detects obstacles based on signals received from the rear left sensor. If the rear left sensor's circuit has an open, short or other malfunction, it will not function normally.

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1. INSPECT NO. 1 ULTRASONIC SENSOR Remove the No. 1 ultrasonic sensor. Measure the resistance of the sensor. Standard resistance Tester Connection Specified Condition 1 (E) - 2 (S) 900 +-300 kohms NOTE: Set the tester to the 100 kohms range before performing the measurement. NG --> REPLACE NO. 1 ULTRASONIC SENSOR (REAR LEFT SENSOR) OK: Go to next step
2. CHECK WIRE HARNESS (CLEARANCE WARNING ECU - NO. 1 ULTRASONIC SENSOR) Disconnect the A38 ECU connector. Disconnect the Z1 sensor connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition A38-11 (S6) - Z1-2 (S) Below 1 ohms A38-29 (ER) - Z1-1 (E) Below 1 ohms A38-11 (S6) - Body ground 1 Mohms or higher A38-29 (ER) - Body ground 1 Mohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE CLEARANCE WARNING ECU

The No. 2 ultrasonic sensor (rear left center sensor) is installed on the rear bumper.

The clearance warning ECU detects obstacles based on signals received from the rear left center sensor. If the rear left center sensor's circuit has an open, short or other malfunction, it will not function normally.

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1. INSPECT NO. 2 ULTRASONIC SENSOR Remove the No. 2 ultrasonic sensor. Measure the resistance of the sensor. Standard resistance Tester Connection Specified Condition 1 (E) - 2 (S) 900 +-300 kohms NOTE: Set the tester to the 100 kohms range before performing the measurement. NG --> REPLACE NO. 2 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR) OK: Go to next step
2. CHECK WIRE HARNESS (CLEARANCE WARNING ECU - NO. 2 ULTRASONIC SENSOR) Disconnect the A38 ECU connector. Disconnect the Z2 sensor connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition A38-13 (S8) - Z2-2 (S) Below 1 ohms A38-29 (ER) - Z2-1 (E) Below 1 ohms A38-13 (S8) - Body ground 1 Mohms or higher A38-29 (ER) - Body ground 1 Mohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE CLEARANCE WARNING ECU

The No. 2 ultrasonic sensor (rear right center sensor) is installed on the rear bumper.

The clearance warning ECU detects obstacles based on signals received from the rear right center sensor. If the rear right center sensor's circuit has an open, short or other malfunction, it will not function normally.

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1. INSPECT NO. 2 ULTRASONIC SENSOR Remove the No. 2 ultrasonic sensor. Measure the resistance of the sensor. Standard resistance Tester Connection Specified Condition 1 (E) - 2 (S) 900 +-300 kohms NOTE: Set the tester to the 100 kohms range before performing the measurement. NG --> REPLACE NO. 2 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR) OK: Go to next step
2. CHECK WIRE HARNESS (CLEARANCE WARNING ECU - NO. 2 ULTRASONIC SENSOR) Disconnect the A38 ECU connector. Disconnect the Z3 sensor connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition A38-12 (S7) - Z3-2 (S) Below 1 ohms A38-29 (ER) - Z3-1 (E) Below 1 ohms A38-12 (S7) - Body ground 1 Mohms or higher A38-29 (ER) - Body ground 1 Mohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE CLEARANCE WARNING ECU

The No. 1 ultrasonic sensor (rear right sensor) is installed on the rear bumper.

The clearance warning ECU detects obstacles based on signals received from the rear right sensor. If the rear right sensor's circuit has an open, short or other malfunction, it will not function normally.

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1. INSPECT NO. 1 ULTRASONIC SENSOR Remove the No. 1 ultrasonic sensor. Measure the resistance of the sensor. Standard resistance Tester Connection Specified Condition 1 (E) - 2 (S) 900 +-300 kohms NOTE: Set the tester to the 100 kohms range before performing the measurement. NG --> REPLACE NO. 1 ULTRASONIC SENSOR (REAR RIGHT SENSOR) OK: Go to next step
2. CHECK WIRE HARNESS (CLEARANCE WARNING ECU - NO. 1 ULTRASONIC SENSOR) Disconnect the A38 ECU connector. Disconnect the Z4 sensor connector. Measure the resistance of the wire harness side connectors. Standard resistance Tester Connection Specified Condition A38-10 (S5) - Z4-2 (S) Below 1 ohms A38-29 (ER) - Z4-1 (E) Below 1 ohms A38-10 (S5) - Body ground 1 Mohms or higher A38-29 (ER) - Body ground 1 Mohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE CLEARANCE WARNING ECU

After replacing the clearance warning ECU, this DTC is output until the initial learning operation (steering angle mid-point and maximum steering angle range setting) is completed.

If this DTC is output, B2243 will also be output.

Note. When the clearance warning ECU is replaced, the initial learning operation (steering angle mid-point and maximum steering angle range setting) must be performed.

HINT

When replacing the ECU with another ECU, the ECU may not cause a DTC output if an initial learning operation was already performed on it.

This DTC is output when one of the following occurs: 1) the initial learning operation is not completed; 2) after the initial learning operation is completed, power is cut due to the battery cable being disconnected and reconnected, etc.; or 3) a data blockage at the steering angle sensor or variable gear ratio steering system occurs.

HINT

Steering angle sensor data is received through the CAN line. When a data blockage occurs, it is displayed on the multi-information display. Refer to OPERATION CHECK .

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1. CHECK MULTI-INFORMATION DISPLAY Turn the power switch on (IG). Turn the clearance sonar main switch ON. Check that the steering guide mark is blinking or illuminated on the multi-information display. HINT: The guide mark blinks when there is a malfunction in the steering angle sensor signal, and illuminates when the steering angle mid-point learning operation is being performed. RESULT Result Proceed to Illuminated A Blinking B B --> GO TO CAN COMMUNICATION SYSTEM A: Go to next step
2. SET STEERING ANGLE MID-POINT Set the steering angle mid-point. Refer to «INITIALIZATION»(ref-387168-S02271067472011022400000) . HINT: Use method 1, 2 or 3 to set the steering angle mid-point. NEXT: Go to next step
3. CHECK FOR DTC Connect the Techstream to the DLC3. Using the Techstream, check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-387168-S41957173172011022400000) . RESULT Result Proceed to B2243 is output A DTC is not output B B --> END A: Go to next step
4. INITIAL LEARNING OPERATION SETTING Perform the initial learning operation. Refer to «INITIALIZATION»(ref-387168-S02271067472011022400000) . NEXT --> END

The clearance sonar main switch is installed on the integration control and panel.

When the clearance sonar main switch in turned ON, an ON signal is sent to the clearance warning ECU through the BEAN line. The intuitive parking assist system operates according to this signal.

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This circuit provides power to operate the clearance warning ECU.

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1. INSPECT FUSE (LH-IG) Remove the LH-IG fuse from the main body ECU LH. Measure the resistance of the LH-IG fuse. Standard resistance Below 1 ohms NG --> REPLACE FUSE OK: Go to next step
2. CHECK WIRE HARNESS (CLEARANCE WARNING ECU - BATTERY) Disconnect the A38 ECU connector. Measure the voltage of the wire harness side connector. Standard voltage Tester Connection Condition Specified Condition A38-8 (IG) - Body ground Power switch on (IG) 10 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
3. CHECK WIRE HARNESS (CLEARANCE WARNING ECU - BODY GROUND) Disconnect the A38 ECU connector. Measure the resistance of the wire harness side connector. Standard resistance Tester Connection Specified Condition A38-27 (E) - Body ground Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE