Toyota Venza: Diagnostic Trouble Code Chart

Toyota Venza Service Manual / Networking / Lin Communication System / Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Main Body ECU (Driver Side junction Block Assembly)

DTC Code	Detection Item	Trouble Area
B1206	P/W Master Switch Communication Stop	1. Multiplex network master switch assembly 2. Main body ECU (Driver side junction block assembly) 3. Wire harness or connector 4. ECU-B NO. 2 fuse
B124D	Lost Communication with AFS LIN	1. Inner rear view mirror assembly 2. Wire harness or connector 3. AFS ECU (headlight swivel ECU assembly)
B1273	Sliding Roof ECU Communication Stop	1. Sliding roof ECU (Sliding roof drive gear assembly) 2. Main body ECU (Driver side junction block assembly) 3. Wire harness or connector 4. S/R fuse
B2287	LIN Communication Master Malfunction	1. Multiplex network master switch assembly 2. Main body ECU (Driver side junction block assembly) 3. Wire harness or connector
B2321	Driver Side Door ECU Communication Stop	1. Power window regulator motor assembly (for Driver side) 2. Main body ECU (Driver side junction block assembly) 3. Multiplex network master switch assembly 4. Wire harness or connector 5. FL DOOR fuse
B2322	Front Passenger Side Door ECU Communication Stop	1. Power window regulator motor assembly (for Front passenger side) 2. Main body ECU (Driver side junction block assembly) 3. Wire harness or connector 4. FR DOOR fuse
B2323	Rear Door RH ECU Communication Stop	1. Power window regulator motor assembly (for Rear RH side) 2. Main body ECU (Driver side junction block assembly) 3. Wire harness or connector 4. RR DOOR fuse
B2324	Rear Door LH ECU Communication Stop	1. Power window regulator motor assembly (for Rear LH side) 2. Main body ECU (Driver side junction block assembly) 3. Wire harness or connector 4. RL DOOR fuse
B2325	LIN Communication Bus Malfunction	1. Power window regulator motor assembly (for Driver side) 2. Power window regulator motor assembly (for Front passenger side) 3. Power window regulator motor assembly (for Rear RH side) 4. Power window regulator motor assembly (for Rear LH side) 5. Multiplex network master switch assembly 6. Sliding roof ECU (Sliding roof drive gear assembly) 7. Main body ECU (Driver side junction block assembly) 8. Wire harness or connector

Certification ECU (Smart Key ECU Assembly)

DTC Code	Detection Item	Trouble Area
B2785	Communication Malfunction between ECUs Connected by LIN	1. Certification ECU (Smart key ECU assembly) 2. Power source control ECU (Power management control computer assembly) 3. Steering lock ECU (Steering lock actuator assembly) 4. Wire harness or connector
B2786	No Response from Steering Lock ECU	1. Steering lock ECU (Steering lock actuator assembly) 2. Certification ECU (Smart key ECU assembly) 3. Wire harness or connector 4. STR LOCK fuse
B278C	Lost Communication with Power Source Control	1. Power source control ECU (Power management control computer assembly) 2. Certification ECU (Smart key ECU assembly) 3. Wire harness or connector 4. AM2 fuse

DTC Code

Detection Item

Trouble Area

See page

B2785

Communication Malfunction between ECUs Connected by LIN

1. Certification ECU (Smart key ECU assembly)

2. Power source control ECU (Power management control computer assembly)

3. Steering lock ECU (Steering lock actuator assembly)

4. Wire harness or connector

B2786

No Response from Steering Lock ECU

1. Steering lock ECU (Steering lock actuator assembly)

2. Certification ECU (Smart key ECU assembly)

3. Wire harness or connector

4. STR LOCK fuse

B278C

Lost Communication with Power Source Control

1. Power source control ECU (Power management control computer assembly)

2. Certification ECU (Smart key ECU assembly)

3. Wire harness or connector

4. AM2 fuse

AFS ECU (headlight swivel ECU assembly)

DTC Code	Detection Item	Trouble Area	See page
B2432	Lost Communication with Automatic High Beam Sensor	1. Inner rear view mirror assembly 2. Wire harness or connector 3. AFS ECU (headlight swivel ECU assembly)

DTC Code

Detection Item

Trouble Area

See page

B2432

Lost Communication with Automatic High Beam Sensor

1. Inner rear view mirror assembly

2. Wire harness or connector

3. AFS ECU (headlight swivel ECU assembly)

Lost Communication with Power Source Control (B278C)

DESCRIPTION This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and power management control ECU stops for more than 10 seconds. DTC Code ...

No Response from Steering Lock ECU (B2786)

DESCRIPTION This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator assembly) stops for more than 10 seconds ...

Other materials about Toyota Venza:

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: The back door closer system troubleshooting procedure is based on the premise that the power back door system is operating normally. Check the power back door system first before troubleshooting the back door clo ...

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART ACTIVE TORQUE CONTROL 4WD SYSTEM DTC Code Detection Item Trouble Area See page C1241/94 Low Power Supply Voltage 1. Battery 2. ECU-IG1 fuse ...

Glass Position Initialization Incomplete (B2313)
DESCRIPTION The power window regulator motor assembly is operated by the power window regulator master switch assembly or power window regulator switch assembly. The power window regulator motor assembly has motor, regulator and ECU functions. When the E ...