RM38N0EC _57 Power Source / Network _111829 NETWORKING _0505699 LIN COMMUNICATION SYSTEM C

NETWORKING LIN COMMUNICATION SYSTEM 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	DTC Output from	Priority
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) · Wire harness or connector · ECU-B NO. 1 fuse	Entry&Start	A

WIRING DIAGRAM

0.76,2.323 4.427,2.521 3.667,0.198 10 false : LIN Communication Line 0.292,1.667 2.104,2.104 1.813,0.438 10 false Certification ECU (Smart Key ECU Assembly) 0.292,1.51 0.75,1.708 0.458,0.198 10 false E52 1.667,0.969 2.125,1.167 0.458,0.198 10 false LIN 2.01,0.802 2.469,1 0.458,0.198 10 false 8 3.083,0.802 3.542,1 0.458,0.198 10 false 2 3.292,0.969 3.75,1.167 0.458,0.198 10 false LIN1 4.552,0.802 5.01,1 0.458,0.198 10 false +B 4.438,1.146 4.896,1.344 0.458,0.198 10 false GND 3.229,1.677 4.813,2.229 1.583,0.552 10 false ID Code Box (Immobiliser Code ECU) 3.229,1.51 3.688,1.708 0.458,0.198 10 false E55 6.208,0.802 7.063,1.219 0.854,0.417 10 false from Auxiliary Battery 5.073,0.969 6.104,1.375 1.031,0.406 10 false ECU-B NO. 1 4.854,0.667 5.313,0.865 0.458,0.198 10 false 1 4.865,1.021 5.323,1.219 0.458,0.198 10 false 5

CAUTION / NOTICE / HINT

NOTICE:: ·

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

·

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.

·

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

PROCEDURE

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

Pre-procedure1

Disconnect the E52 certification ECU (smart key ECU assembly) connector.

Disconnect the E55 ID code box (immobiliser code ECU) connector.

Procedure1

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	Condition	Specified Condition
Click Location & Routing(E52,E55)Location & Routingewd_type=routing;type=c,c;code=E52,E55 Click Connector(E52)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Smart Key ECU Assemblyewd_type=component;type=c;code=E52;pinno=8 Click Connector(E55)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>ID Code Box (Immobiliser Code ECU)ewd_type=component;type=c;code=E55;pinno=2
E52-8 (LIN) - E55-2 (LIN1)	Ignition switch off	Below 1 Ω
E52-8 (LIN) or E55-2 (LIN1) - Body ground	Ignition switch off	10 kΩ or higher

Tester Connection

Condition

Specified Condition

Click Location & Routing(E52,E55)Location & Routingewd_type=routing;type=c,c;code=E52,E55

Click Connector(E52)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Smart Key ECU Assemblyewd_type=component;type=c;code=E52;pinno=8

Click Connector(E55)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>ID Code Box (Immobiliser Code ECU)ewd_type=component;type=c;code=E55;pinno=2

E52-8 (LIN) - E55-2 (LIN1)

Ignition switch off

Below 1 Ω

E52-8 (LIN) or E55-2 (LIN1) - Body ground

Ignition switch off

10 kΩ or higher

Result:

Proceed to
OK
NG

Post-procedure1

None

2.CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - AUXILIARY BATTERY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - AUXILIARY BATTERY)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(E55)Location & Routingewd_type=routing;type=c;code=E55 Click Connector(E55)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>ID Code Box (Immobiliser Code ECU)ewd_type=component;type=c;code=E55;pinno=1,5
E55-1 (+B) - E55-5 (GND)	Ignition switch off1 Always2	11 to 14 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(E55)Location & Routingewd_type=routing;type=c;code=E55

Click Connector(E55)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>ID Code Box (Immobiliser Code ECU)ewd_type=component;type=c;code=E55;pinno=1,5

E55-1 (+B) - E55-5 (GND)

Ignition switch off*1
Always*2

11 to 14 V

*1: for HV Model

*2: for Gasoline Model

Result:

Proceed to
OK
NG

3.CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - BODY GROUND)

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - BODY GROUND)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(E55)Location & Routingewd_type=routing;type=c;code=E55 Click Connector(E55)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>ID Code Box (Immobiliser Code ECU)ewd_type=component;type=c;code=E55;pinno=5
E55-5 (GND) - Body ground	Always	Below 1 Ω

Tester Connection

Condition

Specified Condition

Click Location & Routing(E55)Location & Routingewd_type=routing;type=c;code=E55

Click Connector(E55)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>ID Code Box (Immobiliser Code ECU)ewd_type=component;type=c;code=E55;pinno=5

E55-5 (GND) - Body ground

Always

Below 1 Ω

Result:

Proceed to
OK
NG

4.REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

Replace the ID code box (immobiliser code ECU).

HINT:: Refer to Service Bulletin.

Result:

Proceed to
NEXT

5.REGISTER ECU CODE REGISTRATION

HINT:: Refer to Service Bulletin.

Result:

Proceed to
NEXT

6.CLEAR DTC

Clear the DTCs.

Body Electrical > Entry&Start > Clear DTCs: 50002 440

Result:

Proceed to
NEXT

7.CHECK FOR DTC

Check for DTCs.

Body Electrical > Entry&Start > Trouble Codes: 50001 440

Result:

Result	Proceed to
B278987 is not output	A
B278987 is output	B

END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)