Lighting System (For Sedan) Acc Signal Circuit

Vehicle Interior. Yaris. Ncp93, 131
Lighting (Int). Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING TECHSTREAM

PERFORM ACTIVE TEST USING TECHSTREAM

CHECK HARNESS AND CONNECTOR (ACC CUT RELAY - IGNITION SWITCH)

CHECK HARNESS AND CONNECTOR (ACC CUT RELAY - MAIN BODY ECU)

INSPECT ACC CUT RELAY

CHECK HARNESS AND CONNECTOR (ACC CUT RELAY - BATTERY)

CHECK HARNESS AND CONNECTOR (ACC CUT RELAY - ECM)

LIGHTING SYSTEM (for Sedan) - ACC Signal Circuit


DESCRIPTION

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

WIRING DIAGRAM


Yaris. Ncp93, 131.Lighting (Int).Lighting System (For Sedan).Lighting System (For Sedan) Acc Signal Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.READ VALUE USING TECHSTREAM

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

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

  1. According to the display on the Techstream, read the Data List.

    Main Body
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    ACC SW
    		Ignition switch signal/
    ON or OFF
    		ON: Ignition switch ACC
    OFF: Ignition switch off
    		-
    OK:
    Normal conditions listed above are displayed.


NG
Go to step 2
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (YARIS_NCP93 RM000001D9C00XX.html)

2.PERFORM ACTIVE TEST USING TECHSTREAM

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Enter the following menus: Powertrain / Engine and ECT / Active Test.

  1. According to the display on the Techstream, perform the Active Test.

    Engine and ECT
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Activate the ACC CUT Relay
    		ACC CUT relay
    		ON or OFF
    		Test possible when engine stopped
    OK:
    ACC CUT relay operating sound occurs.


NG
Go to step 5
OK


3.CHECK HARNESS AND CONNECTOR (ACC CUT RELAY - IGNITION SWITCH)


    Yaris. Ncp93, 131.Lighting (Int).Lighting System (For Sedan).Lighting System (For Sedan) Acc Signal Circuit

  1. Remove the ACC CUT relay.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D45-3 - Body ground
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *1
    		ACC CUT Relay Holder


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (ACC CUT RELAY - MAIN BODY ECU)

  1. Remove the ACC CUT relay.

  1. Disconnect the 4F main body ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D45-4 - 4F-5
    		Always
    		Below 1 Ω
    D45-4 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU

5.INSPECT ACC CUT RELAY

  1. Inspect the ACC CUT relay (YARIS_NCP93 RM000001E2C01HX.html).



NG
REPLACE ACC CUT RELAY
OK


6.CHECK HARNESS AND CONNECTOR (ACC CUT RELAY - BATTERY)


    Yaris. Ncp93, 131.Lighting (Int).Lighting System (For Sedan).Lighting System (For Sedan) Acc Signal Circuit

  1. Remove the ACC CUT relay.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    D45-2 - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *1
    		ACC CUT Relay Holder


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.CHECK HARNESS AND CONNECTOR (ACC CUT RELAY - ECM)

  1. Remove the ACC CUT relay.

  1. Disconnect the A21 ECM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D45-1 - A21-13 (ACCR)
    		Always
    		Below 1 Ω
    D45-1 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (YARIS_NCP93 RM000001CN002AX.html)