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ENTRY AND START SYSTEM (for Start Function) > Power Source Mode does not Change to ON (ACC)

for Preparation Click here


DESCRIPTION

When the power switch is pushed with the electrical key in the cabin, the power management control ECU receives signals to change the power source mode.

HINT:
To allow use of the intelligent tester to inspect the push-button start function when the power source mode is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between the intelligent tester and power management control ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)


WIRING DIAGRAM

Refer to DTC B2274 (Click here).

INSPECTION PROCEDURE

1.CHECK HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU)

  1. Disconnect the L5 and L6 connectors from the power management control ECU.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    L5-1 (AM22) - Body ground
    		Always
    		9.5 to 16 V
    L6-7 (AM21) - Body ground
    		Always
    		9.5 to 16 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU)
OK


2.CHECK HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

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

    Standard Resistance:
    Tester Connection
    		Condition
    		 Specified Condition
    L5-5 (E01) - Body ground
    		Always
    		Below 1 Ω
    L5-6 (E1) - Body ground
    		Always
    		Below 1 Ω
    L6-4 (E12) - Body ground
    		Always
    		Below 1 Ω
    L6-5 (E02) - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)
OK


3.INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    B231373E03

  1. Remove the instrument panel junction block assembly.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2A-43 - 2B-4
    		20°C (68°F)
    		81.49 to 118.98 Ω
    2A-43 - 2B-6
    		20°C (68°F)
    		81.49 to 118.98 Ω
    2B-4 - 2B-6
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Component without harness connected
    (Instrument Panel Junction Block Assembly)



NG
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (Click here)
OK


4.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - INSTRUMENT PANEL J/B)

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    L6-1 (ACCD) - 2A-43
    		Always
    		Below 1 Ω
    L6-1 (ACCD) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND)

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2B-4 - Body ground
    		Always
    		Below 1 Ω
    2B-6 - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND)
OK


6.INSPECT POWER MANAGEMENT CONTROL ECU


    B229525E04

  1. Reinstall the instrument panel junction block assembly.

  1. Reconnect the L5 and L6 connectors.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    L6-1 (ACCD) - Body ground
    		Power switch on (ACC)
    		Output voltage at terminal AM21 or AM22 is -2.5 V or more

    Text in Illustration 
    *1
    		Component with harness connected
    (Power Management Control ECU)



NG
REPLACE POWER MANAGEMENT CONTROL ECU (Click here)
OK

USE SIMULATION METHOD TO CHECK (Click here)