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

NETWORKING  LIN COMMUNICATION SYSTEM(for GTMC Made)  B278987  ID-BOX Missing Message  


DESCRIPTION

This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) stops for 10 seconds or more.

DTC No. Detection Item DTC Detection Condition Trouble Area
B278987 ID-BOX Missing Message No communication between certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) for 10 seconds or more.
·

ID code box (immobiliser code ECU)

·

Certification ECU (smart key ECU assembly)

·

Harness or connector



WIRING DIAGRAM

B463707E32
2.167,1.302 2.563,1.552 0.396,0.25 10 false 8 4.052,1.302 4.448,1.552 0.396,0.25 10 false 2 5.188,0.917 5.583,1.167 0.396,0.25 10 false 1 5.177,1.854 5.573,2.104 0.396,0.25 10 false 5 1.854,1.458 2.25,1.708 0.396,0.25 10 false LIN 4.229,1.458 4.625,1.708 0.396,0.25 10 false LIN1 4.896,1.063 5.292,1.313 0.396,0.25 10 false +B 4.771,1.99 5.167,2.24 0.396,0.25 10 false GND 4.292,0.375 6.031,0.594 1.74,0.219 10 false from Auxiliary Battery 5.396,1.25 6.479,1.417 1.083,0.167 10 false ECU-B NO. 1 3.917,2.292 5,2.458 1.083,0.167 10 false G57 0.698,2.281 1.781,2.448 1.083,0.167 10 false G170 0.688,2.458 2.271,2.875 1.583,0.417 10 false Certification ECU (Smart Key ECU Assembly) 3.917,2.5 5.5,3 1.583,0.5 10 false ID Code Box (Immobiliser Code ECU) 0.75,3.417 2.75,3.667 2,0.25 10 false : LIN Communication Line

CAUTION / NOTICE / HINT

NOTICE:
·

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

·

If the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is replaced, refer to Service Bulletin.

·

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.

·

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.

Check 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
B278987 and B278588 are output A
B278987 is output B
B278987 and B278588 are not output C



A

GO TO DTC CHART

Click herePower Source / Network>NETWORKING>LIN COMMUNICATION SYSTEM (for GTMC Made)>B278588


B

2.CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) POWER SOURCE CIRCUIT)

C

USE SIMULATION METHOD TO CHECK

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


2.CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) POWER SOURCE CIRCUIT)
a.
B301231C40
1.51,0.24 1.896,0.51 0.385,0.271 0.771,1.563 1.219,1.344 true 2.771,1.583 2.198,1.365 true 0.083,0.063 0.396,0.26 0.313,0.198 10 false *a 0.5,1.5 0.813,1.698 0.313,0.198 10 false +B 2.844,1.521 3.302,1.719 0.458,0.198 10 false GND 1.604,0.292 2.063,0.49 0.458,0.198 10 false G57
*a Front view of wire harness connector
(to ID Code Box (Immobiliser Code ECU))


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


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
G57-5 (GND) - Body ground Always Below 1 Ω



c.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
G57-1 (+B) - Body ground Ignition switch off 11 to 14 V



Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ID CODE BOX (IMMOBILISER CODE ECU))

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ID CODE BOX (IMMOBILISER CODE 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.

Standard Resistance:
Tester Connection Condition Specified Condition
G170-8 (LIN) - G57-2 (LIN1) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR