RM36D0EC _57 Power Source / Network _083091 NETWORKING _0694852 LIN COMMUNICATION SYSTEM(for GTMC Made) C

NETWORKING  LIN COMMUNICATION SYSTEM(for GTMC Made)  B278588  Communication between ECUs connected by LIN Bus off  


DESCRIPTION

If the certification ECU (smart key ECU assembly) detects a communication error with an ECU connected to the certification bus lines for 7 seconds or more, DTC B278588 will be stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
B278588 Communication between ECUs connected by LIN Bus off
·

Errors in LIN communication between ECUs or an open or short in communication lines.

·

The certification ECU (smart key ECU assembly) detects a communication error with an ECU connected to the certification bus lines for 7 seconds or more.


·

Certification ECU (smart key ECU assembly)

·

ID code box (immobiliser code ECU)

·

Harness or connector



WIRING DIAGRAM

C528075E04
0.229,1.417 0.844,1.615 0.615,0.198 10 false G170 0.208,1.604 3.083,1.875 2.875,0.271 10 false Certification ECU (Smart Key ECU Assembly) 1.656,0.875 2.271,1.073 0.615,0.198 10 false LIN 2.01,0.708 2.625,0.906 0.615,0.198 10 false 8 5.083,0.677 5.698,0.875 0.615,0.198 10 false 2 5.188,1.427 5.802,1.625 0.615,0.198 10 false G57 5.281,0.865 5.896,1.063 0.615,0.198 10 false LIN1 5.198,1.625 6.802,2.01 1.604,0.385 10 false ID Code Box (Immobiliser Code ECU) 0.74,2.302 2.594,2.51 1.854,0.208 10 false : LIN Communication Line

CAUTION / NOTICE / HINT

NOTICE:
·

When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

·

Before replacing the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU), refer to Service Bulletin.

·

Some parts must be initialized and set when replacing or removing and installing parts.

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>WORK PROCEDURE



PROCEDURE

1.CHECK FOR DTC
a.

Clear the DTCs.

Click herePower Source / Network>NETWORKING>LIN COMMUNICATION SYSTEM (for GTMC Made)>DTC CHECK / CLEAR

Body Electrical > Entry&Start > Clear DTCs
50002 440

b.

Recheck for DTCs.

Click herePower Source / Network>NETWORKING>LIN COMMUNICATION SYSTEM (for GTMC Made)>DTC CHECK / CLEAR

Body Electrical > Entry&Start > Trouble Codes
50001 440

Result:
Result Proceed to
DTC B278588 is output A
DTC B278588 is not output B



A

2.CHECK FOR DTC

B

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


2.CHECK FOR DTC
a.

Disconnect the G57 ID code box (immobiliser code ECU) connector.


b.

Clear the DTCs.

Click herePower Source / Network>NETWORKING>LIN COMMUNICATION SYSTEM (for GTMC Made)>DTC CHECK / CLEAR

Body Electrical > Entry&Start > Clear DTCs
50002 440

c.

Recheck for DTCs.

Click herePower Source / Network>NETWORKING>LIN COMMUNICATION SYSTEM (for GTMC Made)>DTC CHECK / CLEAR

Body Electrical > Entry&Start > Trouble Codes
50001 440

Result:
Result Proceed to
B278588 is output A
B278588 is not output B



A

3.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - EACH ECU)

B

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

3.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - EACH ECU)
a.

Disconnect the G170 certification ECU (smart key ECU assembly) connector.


b.

Disconnect the G57 ID code box (immobiliser code ECU) connector.


c.

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

NOTICE:

Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.


Standard Resistance:
Tester Connection Switch Condition Specified Condition
G170-8 (LIN) - G57-2 (LIN1) Always Below 1 Ω
G170-8 (LIN) or G57-2 (LIN1) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR