Lexus ES manuals

Lexus ES: Parking Assist ECU Communication Stop Mode

Lexus ES (XZ10) Service Manual / Power Source & Network / Networking / Can Communication System (for Gasoline Model) / Parking Assist ECU Communication Stop Mode

DESCRIPTION

Detection Item

Symptom

Trouble Area

Parking Assist ECU Communication Stop Mode

Any of the following conditions are met:

  • Communication stop for "Panoramic View Monitor / Circumference Monitoring Camera Control Module" is indicated on the "Communication Bus Check" screen of the Techstream.

    Click here

  • Communication stop history for "Panoramic View Monitor / Circumference Monitoring Camera Control Module" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Panoramic View Monitor / Circumference Monitoring Camera Control Module" is 6 or more.)

    Click here

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

    Click here

  • Parking assist ECU branch line or connector
  • Power source circuit of parking assist ECU
  • Parking assist ECU ground circuit
  • Parking assist ECU

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

  • Before measuring the resistance of the CAN bus, turn the engine 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 engine 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

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

    DTC check procedure: Turn the engine switch on (IG) 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

  • 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 (PARKING ASSIST ECU BRANCH LINE)

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

(b) Disconnect the N44 parking assist ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N44-11 (CANH) - N44-12 (CANL)

Cable disconnected from negative (-) battery terminal

54 to 69 Ω

*a

Front view of wire harness connector

(to Parking Assist ECU)
NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (PARKING ASSIST ECU)
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

N44-4 (GND1) - Body ground

Cable disconnected from negative (-) battery terminal

Below 1 Ω

*a

Front view of wire harness connector

(to Parking Assist ECU)

(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

N44-1 (+B) - Body ground

Always

11 to 14 V

N44-2 (ACC) - Body ground

Engine switch on (ACC)

11 to 14 V

N44-3 (IG) - Body ground

Engine switch on (IG)

11 to 14 V
OK

REPLACE PARKING ASSIST ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

READ NEXT:

 Bus Buffer ECU Communication Stop Mode

DESCRIPTION Detection Item Symptom Trouble Area Bus Buffer ECU Communication Stop Mode Any of the following conditions are met: Communication stop for "Accessory Gateway" is indicated

 Active Noise Control ECU Communication Stop Mode

DESCRIPTION Detection Item Symptom Trouble Area Active Noise Control ECU Communication Stop Mode Any of the following conditions are met: Communication stop for "Active Noise Control"

 Blind Spot Monitor Sensor Communication Stop Mode

DESCRIPTION Detection Item Symptom Trouble Area Blind Spot Monitor Sensor Communication Stop Mode Any of the following conditions are met: Communication stop for "Blind Spot Monitor Ma

SEE MORE:

 Vehicle Information Unmatched (C168D)

DESCRIPTION If the vehicle information stored in the main body ECU (multiplex network body ECU) which is sent via CAN communication during the clearance warning ECU assembly self-diagnosis does not match that of clearance warning ECU assembly, DTC C168D is stored. DTC No. Detection Item DTC D

 Reassembly

REASSEMBLY PROCEDURE 1. INSTALL FRONT DRIVE SHAFT BEARING (for RH Side) (a) Using SST, a steel plate and a press, install a new front drive shaft bearing. SST: 09527-10011 NOTICE: The bearing should be completely installed. *a Steel Plate (b) Using a snap ring expander,

© 2016-2024 Copyright www.lexguide.net