RM3660EC _58 Vehicle Interior _080785 LIGHTING (INT) _0600097 LIGHTING SYSTEM(except NR Series Engine) J

LIGHTING (INT)  LIGHTING SYSTEM(except 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

E500334E04
0.635,0.552 2.031,0.906 1.396,0.354 10 false from Auxiliary Battery 0.198,1.177 2.01,1.792 1.813,0.615 10 false from Certification ECU (Smart Key ECU Assembly)*1 or Ignition Switch Assembly*2 5.479,3.01 7.125,3.5 1.646,0.49 10 false Main Body ECU (Multiplex Network Body ECU) 3.563,2.729 4.698,3.208 1.135,0.479 10 false Power Distribution Box Assembly 4.021,1.458 4.844,1.719 0.823,0.26 10 false IGR NO. 2 4.729,0.729 5.781,0.958 1.052,0.229 10 false ECU-IGR NO. 2 3.177,0.552 3.49,0.75 0.313,0.198 10 false 10B 3.26,0.313 3.417,0.51 0.156,0.198 10 false 1 2.177,0.74 3.219,1.031 1.042,0.292 10 false INP STD NO. 3 3.198,1.792 3.51,1.99 0.313,0.198 10 false 10E 3.271,1.583 3.427,1.781 0.156,0.198 10 false 8 3.229,0.969 3.542,1.167 0.313,0.198 10 false 16 3.208,1.177 3.521,1.375 0.313,0.198 10 false 10F 5.979,0.448 6.292,0.646 0.313,0.198 10 false 27 6.292,0.552 6.75,0.75 0.458,0.198 10 false IGR 3.198,2.417 3.51,2.615 0.313,0.198 10 false 10F 3.271,2.198 3.427,2.396 0.156,0.198 10 false 8 5.469,2.813 5.781,3.01 0.313,0.198 10 false MB 0.208,3.094 5.563,3.292 5.354,0.198 10 false *1: w/ Smart Entry and Start System 0.219,3.427 5.719,3.625 5.5,0.198 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.

·

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



PROCEDURE

1.READ VALUE USING GTS
a.

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
IGR Power Ignition switch ON signal OFF or ON OFF: Ignition switch off
ON: Ignition switch ON 		-
Body Electrical > Main Body > Data List
Tester Display
IGR Power
50003 449 122
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 (except NR Series Engine)>PROBLEM SYMPTOMS TABLE


NG

2.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - POWER SOURCE AND BODY GROUND)
2.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - POWER SOURCE AND BODY GROUND)
a.

Disconnect the 10E, 10F and 10B power distribution box assembly connectors.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition

*1: for Gasoline Model

*2: for HV Model

10B-1 - Body ground Always*1
Ignition switch off*2 		11 to 14 V
10F-16 - Body ground Ignition switch off Below 1 V
10F-16 - Body ground Ignition switch ON 11 to 14 V



c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
10E-8 - Body ground Always Below 1 Ω
10F-8 - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

3.INSPECT POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.INSPECT POWER DISTRIBUTION BOX ASSEMBLY
a.

Remove the main body ECU (multiplex network body ECU) from the power distribution box 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
10B-1 - MB-27 (IGR) Auxiliary battery not connected to 10F-16 - 10E-8 or 10F-8 10 kΩ or higher
10B-1 - MB-27 (IGR) Auxiliary battery positive (+) → 10F-16
Auxiliary battery negative (-) → 10E-8 or 10F-8 		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 POWER DISTRIBUTION BOX ASSEMBLY

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