Dtc U0230 Lost Communication With Rear Gate Module

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

RECONFIRM DTC OUTPUT

CHECK FOR OPEN IN CAN BUS WIRE (POWER BACK DOOR ECU CAN BRANCH WIRE)

CHECK HARNESS AND CONNECTOR (POWER BACK DOOR ECU - BATTERY AND BODY GROUND)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. 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, 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.
   
2. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Click here).
   
3. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
   

HINT:

1. Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
   
2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
   

1. Reconfirm DTCs.
   

   HINT:

   If DTC U1002 is output from Gateway of the main body ECU (multiplex network body ECU), this indicates a sub bus 1 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 1.

   Result

   Result	Proceed to
   DTC U1002 is not output from main body ECU (multiplex network body ECU).	A
   DTC U1002 is output from main body ECU (multiplex network body ECU).	B

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

2. Disconnect the power back door unit assembly (power back door ECU) connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   L52-6 (MPX1) - L52-5 (MPX2)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

   Text in Illustration

   *a	Front view of wire harness connector (to Power Back Door Unit Assembly [Power Back Door ECU])

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

   NOTICE:

   When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Click here).

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   L52-11 (GND) - Body ground	Always	Below 1 Ω

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   L52-10 (ECUB) - Body ground	Always	11 to 14 V
   L52-12 (B) - Body ground	Always	11 to 14 V
   L52-8 (IG) - Body ground	Ignition switch ON	11 to 14 V