RM3660EC _58 Vehicle Interior _080785 LIGHTING (INT) _0600096 LIGHTING SYSTEM(for NR Series Engine) J

LIGHTING (INT)  LIGHTING SYSTEM(for NR Series Engine)  IG Signal Circuit  


DESCRIPTION

This circuit detects the ignition switch ON or off condition, and sends it to the main body ECU (multiplex network body ECU).

WIRING DIAGRAM

E366421E51
1.229,0.531 2.365,0.802 1.135,0.271 10 false from Battery 2.458,0.698 3.063,0.927 0.604,0.229 10 false J/B-AM 4.042,1.438 4.781,1.667 0.74,0.229 10 false IG1-NO. 1 4.729,0.74 5.885,0.948 1.156,0.208 10 false ECU-IG1 NO. 4 6.313,0.458 6.729,0.646 0.417,0.188 10 false IG 0.135,1.125 1.99,2.167 1.854,1.042 10 false from Certification ECU (Smart Key ECU Assembly)*1 or Ignition Switch Assembly*2 6.292,1.781 6.771,2 0.479,0.219 10 false GND1 5.906,1.792 6.208,2.031 0.302,0.24 10 false MB 5.885,0.563 6.188,0.802 0.302,0.24 10 false MB 3.219,0.563 3.49,0.813 0.271,0.25 10 false 4D 3.219,1.188 3.49,1.438 0.271,0.25 10 false 4E 3.229,1.813 3.5,2.063 0.271,0.25 10 false 4F 3.24,0.354 3.521,0.594 0.281,0.24 10 false 1 3.229,0.979 3.51,1.219 0.281,0.24 10 false 17 3.271,1.604 3.552,1.844 0.281,0.24 10 false 3 3.521,2.208 5.833,2.833 2.313,0.625 10 false Driver Side Junction Block Assembly 5.406,3.052 7.052,3.573 1.646,0.521 10 false Main Body ECU (Multiplex Network Body ECU) 5.906,0.365 6.188,0.604 0.281,0.24 10 false 32 5.917,1.594 6.198,1.833 0.281,0.24 10 false 11 6.292,2.625 6.771,2.844 0.479,0.219 10 false GND2 5.906,2.635 6.208,2.875 0.302,0.24 10 false I86 5.917,2.427 6.219,2.667 0.302,0.24 10 false 19 0.281,3.021 3.948,3.219 3.667,0.198 10 false *1: w/ Smart Entry and Start System 0.281,3.385 3.948,3.583 3.667,0.198 10 false *2: w/o Smart Entry and Start System

CAUTION / NOTICE / HINT

NOTICE:
·

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

·

First, check for smart entry and start system (for Start Function) DTCs, and after confirming that there is no malfunction, proceed with troubleshooting.*

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, Gasoline Model (NR Series))>DTC CHECK / CLEAR

·

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.*

*: w/ Smart Entry and Start System




PROCEDURE

1.READ VALUE USING GTS
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Main Body / Data List.


e.

Read the Data List according to the display on the GTS.

Body Electrical > Main Body > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
IG SW Ignition switch ON signal OFF or ON OFF: Ignition switch off
ON: Ignition switch ON 		"OFF" is also displayed for this item when the ignition switch is ACC.
Body Electrical > Main Body > Data List
Tester Display
IG SW
50003 123 30
OK:

Normal conditions listed above are displayed.



Result:
Proceed to
OK
NG



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Interior>LIGHTING (INT)>LIGHTING SYSTEM (for NR Series Engine)>PROBLEM SYMPTOMS TABLE


NG

2.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - POWER SOURCE AND BODY GROUND)
2.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - POWER SOURCE AND BODY GROUND)
a.

Disconnect the 4D and 4F driver side junction block assembly connectors.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
4D-1 - Body ground Always 11 to 14 V



c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
4F-3 - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - BODY GROUND)
a.

Disconnect the I86 main body ECU (multiplex network body ECU) connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
I86-19 (GND2) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (IG1-NO. 1 RELAY POWER SOURCE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.CHECK HARNESS AND CONNECTOR (IG1-NO. 1 RELAY POWER SOURCE)
E369878C07
2.969,0.958 3.365,1.188 0.396,0.229 3.083,1 3.396,1.198 0.313,0.198 10 false 4E 0.229,0.229 0.542,0.427 0.313,0.198 10 false *a
*a Component with harness connected
(Driver Side Junction Block Assembly) 		- -


a.

Connect the 4D and 4F driver side junction block assembly connectors.


b.

Connect the I86 main body ECU (multiplex network body ECU) connector.


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
4E-17 - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

5.INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY
E333577C34
1.698,0.51 2.042,0.729 0.344,0.219 4.938,0.531 5.281,0.75 0.344,0.219 2.438,2.438 2.781,2.656 0.344,0.219 5.729,2.292 6.073,2.51 0.344,0.219 2.031,3.104 1.875,3.396 false 4.219,3.115 4.396,3.396 false 0.25,0.167 0.563,0.323 0.313,0.156 10 false *a 1.802,0.542 2.219,0.781 0.417,0.24 10 false 4F 5.031,0.552 5.448,0.792 0.417,0.24 10 false 4E 2.521,2.469 2.938,2.708 0.417,0.24 10 false MB 5.823,2.323 6.24,2.563 0.417,0.24 10 false 4D 4.417,3.417 4.833,3.656 0.417,0.24 10 false IG 1.677,3.427 2.094,3.667 0.417,0.24 10 false GND1
*a Component without harness connected
(Driver Side Junction Block Assembly) 		- -


a.

Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
4F-3 - MB-11 (GND1) Always Below 1 Ω
4D-1 - MB-32 (IG) Battery not connected to 4E-17 and 4F-3 10 kΩ or higher
4D-1 - MB-32 (IG) Battery positive (+) → 4E-17
Battery negative (-) → 4F-3 		Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL