Toyota 4Runner manuals

Toyota 4Runner: Power Management Control ECU Communication Stop Mode

Toyota 4Runner Service Manual / Power Source / Network / Networking / Can Communication System / Power Management Control ECU Communication Stop Mode

DESCRIPTION

Detection Item

Symptom

Trouble Area

Power Management Control ECU Communication Stop Mode

Either condition is met:

  • "Power Management1" is not displayed on the "CAN Bus Check" screen.
  • "Power Management Control ECU Communication Stop Mode" in "DTC Combination Table" applies.
  • Power source or inside power management control ECU
  • Power management control ECU branch wire or connector
  • Power management control ECU

HINT:

For vehicles with a smart key system only.

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT:

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE

1.

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and branch wire.

CAUTION:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See page ).



NEXT

2.

CHECK FOR OPEN IN CAN BUS WIRE (POWER MANAGEMENT CONTROL ECU BRANCH WIRE)

(a) Disconnect the F80 power management control ECU connector.


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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

F80-14 (CA1H) - F80-13 (CA1L)

Ignition switch off

54 to 69 Ω

Text in Illustration

*a

Rear view of wire harness connector

(to Power Management Control ECU)


NG

REPAIR OR REPLACE POWER MANAGEMENT CONTROL ECU BRANCH WIRE OR CONNECTOR (CA1H, CA1L)


OK

3.

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

(a) Connect the cable to the negative (-) battery terminal.

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See page ).



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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F80-5 (GND2) - Body ground

Always

Below 1 Ω

F80-6 (GND) - Body ground

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

F80-1 (AM22) - Body ground

Always

11 to 14 V

F80-2 (AM21) - Body ground

Always

11 to 14 V

Text in Illustration

*a

Rear view of wire harness connector

(to Power Management Control ECU)


OK

REPLACE POWER MANAGEMENT CONTROL ECU


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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