LIGHTING (INT) LIGHTING SYSTEM ACC Signal Circuit | Toyota Corolla/Altis NZE17/ZRE17 2017 Service Manual

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

0.594,0.76 2.427,0.958 1.833,0.198 10 false from Battery 0.052,1.469 2.146,2.01 2.094,0.542 10 false from Certification ECU (Smart Key ECU Assembly)*1 or Ignition Switch Assembly*2 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 0.615,3.896 3.063,4.125 2.448,0.229 10 false *1: w/ Smart Entry and Start System 0.594,4.281 3.042,4.51 2.448,0.229 10 false *2: w/o Smart Entry and Start System 3.396,3.292 6.042,3.688 2.646,0.396 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.

·

Check for smart entry and start system (for start function) DTCs and confirm that the system is normal before performing the following procedure.*

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM(for Start Function)>DTC CHECK / CLEAR; *: 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
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 (POWER SOURCE CIRCUIT)

a.

Disconnect the 3B, 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
3B-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
3C-9 - Body ground	Always	Below 1 Ω
3D-12 - Body ground	Always	Below 1 Ω

Result:

Proceed to
OK
NG

OK

3.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

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)

-

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.

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 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