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Contents Wiring diagrams Section: Warning System All sections

Intuitive Parking Assist System (Diagnostic Codes & Circuit Tests): Other Lexus HS I

Warning System ~1755 words

PROCEDURE

  1. CHECK DTC OUTPUT Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Result Result Proceed to Only DTC C1AE1 is output A DTC C1AE1 and C1AEC are output B No DTC is output C C --> See step 6 B --> See step 5 A: Go to next step
  2. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR) Replace the No. 1 ultrasonic sensor (front left sensor) with a normally functioning one. Refer to «REMOVAL»(ref-398311-S31933345342011051600000) . HINT: All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle. NEXT: Go to next step
  3. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Result Result Proceed to No DTC is output OK DTC C1AE1 is output NG NG --> See step 4 OK --> END (FRONT LEFT SENSOR WAS DEFECTIVE)
  4. REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to «REMOVAL»(ref-398311-S35006604202011051600000)
  5. GO TO DTC (C1AEC). Refer to «DTC C1AEC: Front Sensor Communication Malfunction»(ref-398316-S11018947312011051600000)
  6. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
  1. CHECK DTC OUTPUT Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Result Result Proceed to Only DTC C1AE4 is output A DTC C1AE4 and C1AEC are output B No DTC is output C C --> See step 6 B --> See step 5 A: Go to next step
  2. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT RIGHT SENSOR) Replace the No. 1 ultrasonic sensor (front right sensor) with a normally functioning one. Refer to «REMOVAL»(ref-398311-S31933345342011051600000) . HINT: All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle. NEXT: Go to next step
  3. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Result Result Proceed to No DTC is output OK DTC C1AE4 is output NG NG --> See step 4 OK --> END (FRONT RIGHT SENSOR WAS DEFECTIVE)
  4. REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to «REMOVAL»(ref-398311-S35006604202011051600000)
  5. GO TO DTC (C1AEC). Refer to «DTC C1AEC: Front Sensor Communication Malfunction»(ref-398316-S11018947312011051600000)
  6. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
  1. CHECK DTC OUTPUT Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Result Result Proceed to Only DTC C1AE6 is output A DTC C1AE6 and C1AED are output B No DTC is output C C --> See step 6 B --> See step 5 A: Go to next step
  2. REPLACE NO. 1 ULTRASONIC SENSOR (REAR LEFT SENSOR) Replace the No. 1 ultrasonic sensor (rear left sensor) with a normally functioning one. Refer to «REMOVAL»(ref-398311-S36162931232011051600000) . HINT: All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle. NEXT: Go to next step
  3. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Result Result Proceed to No DTC is output OK DTC C1AE6 is output NG NG --> See step 4 OK --> END (REAR LEFT SENSOR WAS DEFECTIVE)
  4. REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to «REMOVAL»(ref-398311-S35006604202011051600000)
  5. GO TO DTC (C1AED). Refer to «DTC C1AED: Rear Sensor Communication Malfunction»(ref-398316-S01256434712011051600000)
  6. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
  1. CHECK DTC OUTPUT Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Result Result Proceed to Only DTC C1AE7 is output A DTC C1AE7 and C1AED are output B No DTC is output C C --> See step 6 B --> See step 5 A: Go to next step
  2. REPLACE NO. 1 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR) Replace the No. 1 ultrasonic sensor (rear left center sensor) with a normally functioning one. Refer to «REMOVAL»(ref-398311-S36162931232011051600000) . HINT: All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle. NEXT: Go to next step
  3. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Result Result Proceed to No DTC is output OK DTC C1AE7 is output NG NG --> See step 4 OK --> END (REAR LEFT CENTER SENSOR WAS DEFECTIVE)
  4. REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to «REMOVAL»(ref-398311-S35006604202011051600000)
  5. GO TO DTC (C1AED). Refer to «DTC C1AED: Rear Sensor Communication Malfunction»(ref-398316-S01256434712011051600000)
  6. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
  1. CHECK DTC OUTPUT Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Result Result Proceed to Only DTC C1AE8 is output A DTC C1AE8 and C1AED are output B No DTC is output C C --> See step 6 B --> See step 5 A: Go to next step
  2. REPLACE NO. 1 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR) Replace the No. 1 ultrasonic sensor (rear right center sensor) with a normally functioning one. Refer to «REMOVAL»(ref-398311-S36162931232011051600000) . HINT: All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle. NEXT: Go to next step
  3. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Result Result Proceed to No DTC is output OK DTC C1AE8 is output NG NG --> See step 4 OK --> END (REAR RIGHT CENTER SENSOR WAS DEFECTIVE)
  4. REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to «REMOVAL»(ref-398311-S35006604202011051600000)
  5. GO TO DTC (C1AED). Refer to «DTC C1AED: Rear Sensor Communication Malfunction»(ref-398316-S01256434712011051600000)
  6. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
  1. CHECK DTC OUTPUT Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Result Result Proceed to Only DTC C1AE9 is output A DTC C1AE9 and C1AED are output B No DTC is output C C --> See step 6 B --> See step 5 A: Go to next step
  2. REPLACE NO. 1 ULTRASONIC SENSOR (REAR RIGHT SENSOR) Replace the No. 1 ultrasonic sensor (rear right sensor) with a normally functioning one. Refer to «REMOVAL»(ref-398311-S36162931232011051600000) . HINT: All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle. NEXT: Go to next step
  3. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Result Result Proceed to No DTC is output OK DTC C1AE9 is output NG NG --> See step 4 OK --> END (REAR RIGHT SENSOR WAS DEFECTIVE)
  4. REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to «REMOVAL»(ref-398311-S35006604202011051600000)
  5. GO TO DTC (C1AED). Refer to «DTC C1AED: Rear Sensor Communication Malfunction»(ref-398316-S01256434712011051600000)
  6. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
  1. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-398315-S06752409382011051600000) . Result Result Proceed to DTC (CAN communication system DTC) is output A No DTC is output B B --> See step 3 A --> See step 2
  2. GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398235-S17886579092011051600000)
  3. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
  1. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). 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 power switch is on (IG) OK The clearance warning buzzer sounds. NG --> See step 2 OK --> See step 6
  2. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING BUZZER - BATTERY) Disconnect the F104 connector from the clearance warning buzzer. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F104-1 - Body ground Power switch on (IG) 11 to 14 V F104-1 - Body ground Power switch off Below 1 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - CLEARANCE WARNING BUZZER) Disconnect the A31 connector from the clearance warning ECU assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A31-12 (CBZ) - F104-2 Always Below 1 ohms A31-12 (CBZ) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. REPLACE CLEARANCE WARNING BUZZER Replace the clearance warning buzzer with a new or normally functioning one. Refer to «REMOVAL»(ref-398311-S06468412682011051600000) . NEXT: Go to next step
  5. PERFORM ACTIVE TEST USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). 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 power switch is on (IG) OK The clearance warning buzzer sounds. NG --> See step 7 OK --> END (CLEARANCE WARNING BUZZER WAS DEFECTIVE)
  6. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398315-S09159659082011051600000)
  7. REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to «REMOVAL»(ref-398311-S35006604202011051600000)
  1. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - BATTERY) Disconnect the A31 connector from the clearance warning ECU assembly. Measure the voltage according to the value(s) on the table below. Standard Voltage Tester Connection Condition Specified Condition A31-10 (IG) - Body ground Power switch on (IG) 11 to 14 V A31-10 (IG) - Body ground Power switch off Below 1 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - BODY GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A31-21 (E) - Body ground Always Below 1 ohms 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-398315-S09159659082011051600000)

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