Toyota 4Runner manuals

Toyota 4Runner: 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 inspect the push-button start function when the engine switch is off, repeatedly open and close any of the doors. Repeatedly opening and closing a door establishes communication between the Techstream 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 "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 DRIVER SIDE JUNCTION BLOCK ASSEMBLY (ACC RELAY)



NG

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)


OK

4.

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



NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

5.

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



NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

6.

CHECK POWER MANAGEMENT CONTROL ECU



NG

REPLACE POWER MANAGEMENT CONTROL ECU


OK

7.

CONFIRMATION TEST



OK

USE SIMULATION METHOD TO CHECK


NG

CHECK RELAY CONTACT SIDE CIRCUIT

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 Sour ...

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