Toyota Venza: LIN Communication Master Malfunction (B2287)

Toyota Venza Service Manual / Networking / Lin Communication System / LIN Communication Master Malfunction (B2287)

DESCRIPTION

This DTC is stored when there is an open, short or ECU communication malfunction between the power management control ECU and certification ECU (smart key ECU assembly).

DTC No.	DTC Detection Condition	Trouble Area
B2287	There is an open, short or ECU communication malfunction between the power management control ECU and certification ECU (smart key ECU assembly).	Power management control ECU Certification ECU (Smart key ECU assembly) Wire harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the certification ECU (smart key ECU assembly) is replaced, register the key.
When using the Techstream to troubleshoot with the ignition switch off:
Connect the Techstream to the DLC3, and turn the courtesy switch on and off at 1.5-second intervals until communication between the Techstream and vehicle begins.

PROCEDURE

1.	CHECK DTC OUTPUT

(a) Clear the DTC (See page ).

(b) Recheck for DTCs.

HINT:

Check for certification ECU and power source control ECU DTCs.

Result	Proceed to
Only DTC B2287 is output.	A
DTC B2287 and B2785 are output simultaneously.	B

HINT:

When DTC B2287 and B2785 are output simultaneously, perform troubleshooting for DTC B2785 first.

GO TO DTC B2785

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

(a) Disconnect the D25 and D43 ECU connectors.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
D25-29 (LIN) - D43-24 (LIN2)	Always	Below 1 Ω
D25-29 (LIN) - Body ground	Always	10 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Certification ECU (Smart Key ECU Assembly)

Front view of wire harness connector

(to Power Management Control ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	REPLACE POWER MANAGEMENT CONTROL ECU

(a) Replace the power management control ECU (See page ).

4.	CHECK DTC OUTPUT

(a) Clear the DTC (See page ).

(b) Recheck for DTCs.

OK:

DTC B2287 is not output.

END (POWER MANAGEMENT CONTROL ECU WAS DEFECTIVE)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Sliding Roof ECU Communication Stop (B1273)

DESCRIPTION This DTC is stored when LIN communication between the sliding roof ECU (sliding roof drive gear sub-assembly) and main body ECU (driver side junction block assembly) stops for more th ...

Lost Communication with AFS LIN (B124D)

DESCRIPTION Refer to DTC B124D (Lighting system) (See page ). DTC No. DTC Detection Condition Trouble Area B124D Malfunctions in LIN co ...

Other materials about Toyota Venza:

Moon roof
Use the overhead switches to open, close, and tilt the moon roof up and down. - Opening and closing 1. Open The moon roof stops slightly before the fully open position to reduce wind noise. Move the switch backward again to fully open. 2. Close ( ...

Communication Malfunction No. 1 (B2797)
DESCRIPTION This DTC is stored when an error occurs in communication between the transponder key amplifier and the transponder key ECU assembly. HINT: Some noise is found in the communication line. DTC No. DTC Detection Condition ...

System Description
SYSTEM DESCRIPTION 1. PUSH-BUTTON START DESCRIPTION (a) The push-button start uses a push-type engine switch, which the driver can operate by merely carrying the electrical key. This system consists primarily of the power management control ECU, engine s ...