LIGHTING (INT)  LIGHTING SYSTEM  ACC Signal Circuit  


DESCRIPTION

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

WIRING DIAGRAM

E283425E08
0.594,0.76 2.427,0.958 1.833,0.198 10 false from Battery 0.104,1.292 1.302,2.063 1.198,0.771 10 false from Ignition Switch Assembly 2.313,0.938 2.771,1.135 0.458,0.198 10 false ALT 3.552,0.792 3.865,0.99 0.313,0.198 10 false 3B 3.542,1.271 3.854,1.469 0.313,0.198 10 false 3D 3.552,1.969 3.865,2.167 0.313,0.198 10 false 3D 3.563,2.708 3.875,2.906 0.313,0.198 10 false 3C 5.521,3.646 5.833,3.844 0.313,0.198 10 false MB 5.906,2.625 6.219,2.823 0.313,0.198 10 false 11 5.906,0.698 6.219,0.896 0.313,0.198 10 false 29 3.583,0.594 3.896,0.792 0.313,0.198 10 false 1 3.563,1.063 3.875,1.26 0.313,0.198 10 false 26 3.542,1.771 3.854,1.969 0.313,0.198 10 false 12 3.615,2.5 3.927,2.698 0.313,0.198 10 false 9 3.396,3.292 5.01,3.708 1.615,0.417 10 false Instrument Panel Junction Block Assembly 5.521,3.844 7.156,4.198 1.635,0.354 10 false Main Body ECU (Multiplex Network Body ECU) 4.49,1.563 4.948,1.76 0.458,0.198 10 false ACC 5.104,0.958 5.563,1.156 0.458,0.198 10 false ACC 6.167,0.802 6.625,1 0.458,0.198 10 false ACC 6.156,2.708 6.615,2.906 0.458,0.198 10 false GND1

CAUTION / NOTICE / HINT

NOTICE:

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


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
ACC SW Ignition switch ACC signal ON or OFF ON: Ignition switch ACC
OFF: Ignition switch off 		"ON" is also displayed for this item when the ignition switch is ON.
Body Electrical > Main Body > Data List
Tester Display
ACC SW
50003 123 31
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 (BATTERY POWER SOURCE)
2.CHECK HARNESS AND CONNECTOR (BATTERY POWER SOURCE)
a.

Disconnect the 3B instrument panel junction block assembly connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
3B-1 - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - ACC RELAY POWER SOURCE AND BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - ACC RELAY POWER SOURCE AND BODY GROUND)
a.

Disconnect the 3C and 3D instrument panel junction block assembly connectors.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
3D-26 - Body ground Ignition switch ACC 11 to 14 V



c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3C-9 - Body ground Always Below 1 Ω
3D-12 - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

4.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
a.

Remove the instrument panel junction block assembly.

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


b.

Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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


c.

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

E258619C13
1.802,0.844 2.104,1.042 0.302,0.198 4.875,0.781 5.177,0.979 0.302,0.198 1.063,2.188 1.365,2.385 0.302,0.198 4.188,2.427 4.49,2.625 0.302,0.198 6.042,3.406 5.927,3.021 false 3.938,3.396 3.823,3.01 false 1.125,2.208 1.438,2.406 0.313,0.198 10 false 3B 1.854,0.865 2.167,1.063 0.313,0.198 10 false 3C 4.938,0.802 5.25,1 0.313,0.198 10 false 3D 4.229,2.448 4.542,2.646 0.313,0.198 10 false MB 0.354,0.302 0.76,0.656 0.406,0.354 10 false *a 5.906,3.427 6.365,3.625 0.458,0.198 10 false ACC 3.781,3.417 4.24,3.615 0.458,0.198 10 false GND1
*a Component without harness connected
(Instrument Panel Junction Block Assembly) 		- -


Standard Resistance:
Tester Connection Condition Specified Condition
3B-1 - MB-29 (ACC) Battery not connected to 3D-26 and 3D-12 10 kΩ or higher
3B-1 - MB-29 (ACC) Battery not connected to 3D-26 and 3C-9 10 kΩ or higher
3B-1 - MB-29 (ACC) Battery not connected to 3D-26 and MB-11 (GND1) 10 kΩ or higher
3B-1 - MB-29 (ACC) Battery positive (+) → 3D-26
Battery negative (-) → 3D-12 		Below 1 Ω
3B-1 - MB-29 (ACC) Battery positive (+) → 3D-26
Battery negative (-) → 3C-9 		Below 1 Ω
3B-1 - MB-29 (ACC) Battery positive (+) → 3D-26
Battery negative (-) → MB-11 (GND1) 		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 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

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