Toyota 4Runner: Power Source Mode does not Change to ON (IG)

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System(for Start Function) / Power Source Mode does not Change to ON (IG)

DESCRIPTION

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

WIRING DIAGRAM

Refer to "Power Source Mode does not Change to on (IG and ACC)" (See page ).

CAUTION / NOTICE / HINT

NOTICE:

When using the Techstream with the engine switch off to troubleshoot: Connect the Techstream to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.
Before performing the inspection, check that there are no problems related to the CAN communication system and LIN communication system.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.	INSPECT NO. 1 INTEGRATION RELAY (IG2 RELAY)

NG

REPLACE NO. 1 INTEGRATION RELAY

OK

4.	INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY (IG1 NO. 1, IG1 NO. 2 AND IG1 NO. 3 RELAYS)

NG

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

OK

5.	CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.	CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.	CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - NO. 1 INTEGRATION RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

8.	CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.	CHECK POWER MANAGEMENT CONTROL ECU

NG

REPLACE POWER MANAGEMENT CONTROL ECU

OK

10.	CONFIRM TEST

OK

USE SIMULATION METHOD TO CHECK

NG

CHECK RELAY CONTACT SIDE CIRCUIT

Power Source Mode does not Change to ON (IG and ACC)

DESCRIPTION When the engine switch is pushed with the key in the cabin, the power management control receives signals to switch the power source mode. WIRING DIAGRAM CAUTION / NOTICE / HINT ...

Power Source Mode does not Change to ON (ACC)

DESCRIPTION When the engine switch is pushed with the key in the cabin, the power management control ECU receives signals to switch the power source mode. HINT: To allow use of the Techstream to ...

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TERMINALS OF ECU HINT: Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation. 1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL (a) Disconnect the cable fro ...

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PRECAUTION 1. IGNITION SWITCH EXPRESSION HINT: The type of ignition switch used on this model differs depending on the specifications of the vehicle. The expressions listed in the table below are used in this section. Expression Ign ...

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