Toyota 4Runner manuals

Toyota 4Runner: ACC Monitor Malfunction (B2274)

DESCRIPTION

This DTC is stored when there is a problem in the ACC output circuit, which is from the ACC output terminal of the power management control ECU to the ACC relay.

HINT:

When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode is reset to on (IG). When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC Code

DTC Detection Condition

Trouble Area

B2274

The ACC relay actuation circuit inside the power management control ECU or other related circuit is malfunctioning.

  • AM2 fuse
  • Main body ECU (Driver side junction block assembly) (ACC relay)
  • Power management control ECU
  • Harness or connector

WIRING DIAGRAM


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)

(a) Remove the driver side junction block assembly.


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2C-48 - 2B-4

20°C (68°F)

101.25 to 123.75 Ω

Text in Illustration

*a

Component without harness connected

(Driver Side Junction Block Assembly)


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)

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

(b) Disconnect the 2C driver side junction block assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F80-19 (ACCD) - 2C-48

Always

Below 1 Ω

F80-19 (ACCD) - Body ground

Always

10 kΩ or higher


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

(a) Connect the power management control ECU connector.

Text in Illustration

*a

Component with harness connected

(Power Management Control ECU)

-

-

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F80-19 (ACCD) - Body ground

Engine switch off

Below 1 V

Engine switch on (ACC)

((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher


OK

USE SIMULATION METHOD TO CHECK


NG

REPLACE POWER MANAGEMENT CONTROL ECU

Runnable Signal Malfunction (B2286,P0335)
DESCRIPTION The power management control ECU and ECM are connected by a cable and the CAN communication lines. These DTCs are stored when the crankshaft position sensor signal information from th ...

Vehicle Speed Signal Malfunction (B2282,B2283)
DESCRIPTION The power management control ECU and the combination meter are connected by a cable and the CAN communication lines. This DTC is stored when the vehicle speed signal information from ...

Other materials about Toyota 4Runner:

Customize Parameters
CUSTOMIZE PARAMETERS 1. CUSTOMIZING FUNCTION WITH THE TECHSTREAM HINT: The following items can be customized. NOTICE: When the customer requests a change in a function, first make sure that the function can be customized. Record the curren ...

Automatic Disconnecting Differential Actuator
Components COMPONENTS ILLUSTRATION Installation INSTALLATION PROCEDURE 1. INSTALL AUTOMATIC DISCONNECTING DIFFERENTIAL ACTUATOR (a) Remove any old FIPG material. NOTICE: Be careful not to drop oil on the contact surfaces of the actuator and clut ...

© 2016-2020 | www.to4runner.net

0.0058