Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001532X
Model Year Start: 2018 Model: Camry Prod Date Range: [06/2017 - 10/2020]
Title: NETWORKING: CAN COMMUNICATION SYSTEM: Clearance Warning ECU Communication Stop Mode; 2018 - 2020 MY Camry [06/2017 - 10/2020]

Clearance Warning ECU Communication Stop Mode

DESCRIPTION

Detection Item

Symptom

Trouble Area

Clearance Warning ECU Communication Stop Mode

Any of the following conditions are met:

  • Communication stop for "Clearance Warning (Intuitive Parking Assist)" is indicated on the "Communication Bus Check" screen of the Techstream.

    Click here 2018 - 2020 MY Camry [06/2017 - 03/2020]; NETWORKING: CAN COMMUNICATION SYSTEM: PROBLEM SYMPTOMS TABLE 2020 MY Camry [03/2020 - 10/2020]; NETWORKING: CAN COMMUNICATION SYSTEM: PROBLEM SYMPTOMS TABLE

  • Communication stop history for "Clearance Warning (Intuitive Parking Assist)" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Clearance Warning (Intuitive Parking Assist)" is 6 or more.)

    Click here 2018 - 2020 MY Camry [06/2017 - 03/2020]; NETWORKING: CAN COMMUNICATION SYSTEM: PROBLEM SYMPTOMS TABLE 2020 MY Camry [03/2020 - 10/2020]; NETWORKING: CAN COMMUNICATION SYSTEM: PROBLEM SYMPTOMS TABLE

  • Communication system DTCs (DTCs that start with U) that correspond to "Clearance Warning ECU Communication Stop Mode" in "DTC Combination Table" are output.

    Click here 2018 MY Camry [06/2017 - 08/2018]; NETWORKING: CAN COMMUNICATION SYSTEM: DTC COMBINATION TABLE 2019 MY Camry [08/2018 - 09/2019]; NETWORKING: CAN COMMUNICATION SYSTEM: DTC COMBINATION TABLE 2020 MY Camry [09/2019 - 03/2020]; NETWORKING: CAN COMMUNICATION SYSTEM: DTC COMBINATION TABLE 2020 MY Camry [03/2020 - 10/2020]; NETWORKING: CAN COMMUNICATION SYSTEM: DTC COMBINATION TABLE

  • Clearance warning ECU assembly branch line or connector
  • Power source circuit of clearance warning ECU assembly
  • Clearance warning ECU assembly ground circuit
  • Clearance warning ECU assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

NOTICE:

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

    Click here 2018 - 2024 MY Camry [03/2017 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

  • Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here 2018 - 2019 MY Camry [06/2017 - 09/2019]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION 2020 MY Camry [09/2019 - 03/2020]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION 2020 - 2024 MY Camry [03/2020 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

    DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.

  • After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.

    Click here 2018 MY Camry [06/2017 - 08/2018]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM 2019 MY Camry [08/2018 - 09/2019]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM 2020 MY Camry [09/2019 - 03/2020]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM 2020 MY Camry [03/2020 - 10/2020]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM

  • Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

  • Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
  • When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

1.

CHECK FOR OPEN IN CAN BUS LINES (CLEARANCE WARNING ECU ASSEMBLY BRANCH LINE)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the R39 clearance warning ECU assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

R39-17 (R1) - R39-18 (R2)

Cable disconnected from negative (-) battery terminal

54 to 69 Ω

*a

Front view of wire harness connector

(to Clearance Warning ECU Assembly)
NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY)
OK

2.

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

R39-30 (E) - Body ground

Cable disconnected from negative (-) battery terminal

Below 1 Ω

*a

Front view of wire harness connector

(to Clearance Warning ECU Assembly)

(b) Reconnect the cable to the negative (-) battery terminal.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

R39-1 (IG) - Body ground

Ignition switch ON

11 to 14 V
OK

REPLACE CLEARANCE WARNING ECU ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)