RM38N0EC _58 Vehicle Interior _111833 LIGHTING (INT) _0499871 LIGHTING SYSTEM J

LIGHTING (INT)  LIGHTING SYSTEM  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

E445111E06
0.094,1.479 1.906,1.833 1.813,0.354 10 false from Certification ECU (Smart Key ECU Assembly) 3.615,3.365 6.094,3.667 2.479,0.302 10 false Power Distribution Box Assembly 5.417,4.125 7.073,4.479 1.656,0.354 10 false Main Body ECU (Multiplex Network Body ECU) 6.24,0.792 6.698,0.99 0.458,0.198 10 false IGR 5.01,1.042 5.99,1.229 0.979,0.188 10 false ECU-IGR NO. 2 3.99,1.406 4.969,1.594 0.979,0.188 10 false IGR NO. 2 3.313,0.885 3.625,1.083 0.313,0.198 10 false 4H 3.313,2.063 3.625,2.26 0.313,0.198 10 false 4C 3.323,1.865 3.635,2.063 0.313,0.198 10 false 41 3.333,2.438 3.646,2.635 0.313,0.198 10 false 36 3.323,2.625 3.635,2.823 0.313,0.198 10 false 4B 3.365,0.688 3.677,0.885 0.313,0.198 10 false 1 3.323,1.479 3.635,1.677 0.313,0.198 10 false 4B 3.323,1.271 3.635,1.469 0.313,0.198 10 false 11 5.406,3.948 5.719,4.146 0.313,0.198 10 false MB 5.979,0.792 6.292,0.99 0.313,0.198 10 false 27 5.979,1.948 6.292,2.146 0.313,0.198 10 false 13 5.979,2.531 6.292,2.729 0.313,0.198 10 false 14 6.229,2.052 6.688,2.25 0.458,0.198 10 false GND1 6.229,2.625 6.688,2.823 0.458,0.198 10 false GND2 0.667,0.896 1.677,1.24 1.01,0.344 10 false from INP STD NO. 1 - 3 Fuse

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.

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

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

·

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>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 4B, 4C and 4H 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
4H-1 - Body ground Ignition switch off 11 to 14 V
4B-11 - Body ground Ignition switch off Below 1 V
4B-11 - 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
4B-36 - Body ground Always Below 1 Ω
4C-41 - 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
E438202C06
1.74,0.25 2.177,0.552 0.438,0.302 5,0.24 5.438,0.542 0.438,0.302 4.99,2.146 5.427,2.448 0.438,0.302 1.75,2.063 2.188,2.365 0.438,0.302 4.792,3.344 5.135,2.896 true 5.531,3.333 5.24,2.896 true 6.594,3.354 6.594,2.906 true 1.875,0.313 2.188,0.51 0.313,0.198 10 false 4C 5.125,0.302 5.438,0.5 0.313,0.198 10 false 4B 5.104,2.219 5.417,2.417 0.313,0.198 10 false MB 1.875,2.135 2.188,2.333 0.313,0.198 10 false 4H 0.177,0.177 0.49,0.375 0.313,0.198 10 false *a 4.615,3.354 5.229,3.552 0.615,0.198 10 false GND1 5.375,3.354 5.99,3.552 0.615,0.198 10 false GND2 6.5,3.365 7.115,3.563 0.615,0.198 10 false IGR
*a Component without harness connected (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
4C-41 - MB-13 (GND1) Always Below 1 Ω
4B-36 - MB-14 (GND2) Always Below 1 Ω
4H-1 - MB-27 (IGR) Auxiliary battery not connected to 4B-11 - 4B-36 or 4C-41 10 kΩ or higher
4H-1 - MB-27 (IGR) Auxiliary battery positive (+) → 4B-11
Auxiliary battery negative (-) → 4B-36 or 4C-41 		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