U0230

NETWORKING: CAN COMMUNICATION SYSTEM: U0230: Lost Communication with Rear Gate Module
U0230 - Lost Communication with Rear Gate Module

DESCRIPTION





HINT
For vehicles with the power back door system only.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NOTICE:
* w/ Navigation System:
* After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
* When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.
NEXT -- Continue to next step.

2. CHECK FOR OPEN IN CAN BUS WIRE (POWER BACK DOOR UNIT BRANCH WIRE)





(a) Disconnect the L36 power back door unit (power back door ECU) connector.

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

Standard Resistance:









NG -- REPAIR OR REPLACE POWER BACK DOOR UNIT (POWER BACK DOOR ECU) BRANCH WIRE OR CONNECTOR (MPX1, MPX2)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (POWER BACK DOOR UNIT - BATTERY AND BODY GROUND)

(a) Connect the cable to the negative (-) battery terminal.

NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.

(b) Disconnect the L36 power back door unit (power back door ECU) connector.





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

Standard Resistance:





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

Standard Voltage:









NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POWER BACK DOOR UNIT ASSEMBLY (POWER BACK DOOR ECU)