Toyota Tacoma (2015-2018) Service Manual: Lost Communication with Power Source Control (B278C)
DESCRIPTION
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B278C |
An internal malfunction occurs in the certification ECU (smart key ECU assembly) |
|
CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the vehicle ignition switch off, connect the Techstream to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
- If the certification ECU (smart key ECU assembly) is replaced, register
the keys (See page
.gif)
).
PROCEDURE
|
1. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
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|
2. |
CHECK FOR DTC |
(a) Check for DTCs (See page ).
OK:
DTC B278C is not output.
| OK | .gif) |
USE SIMULATION METHOD TO CHECK |
| NG | |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
P/W Master Switch Communication Stop (B1206)
DESCRIPTION
This DTC is stored when LIN communication between the power window regulator
master switch assembly and main body ECU (multiplex network body ECU) stops for
10 seconds or more.
...
Front Passenger Side Door ECU Communication Stop (B2322)
DESCRIPTION
This DTC is stored when LIN communication between the front power window regulator
motor assembly RH and main body ECU (multiplex network body ECU) stops for 10 seconds
or more.
...
Other materials:
Reassembly
REASSEMBLY
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for both the LH and RH sides.
The procedure described below is for the LH side.
PROCEDURE
1. INSTALL CLEARANCE LIGHT BULB
(a) Install the clearance light bulb to the clearance light socket.
(b) Turn t ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL ENGINE WATER PUMP ASSEMBLY
(a) Install the engine water pump assembly and a new gasket to the timing
chain cover assembly with the 15 bolts.
Torque:
for Bolt A and B :
11 N·m {112 kgf·cm, 8 ft·lbf}
for Bolt C :
21 N·m {214 kgf ...
Cautions & Notices
CAUTION
This is a warning against anything which may cause injury to people if the
warning is ignored. You are informed about what you must or must not do in order
to reduce the risk of injury to yourself and others.
NOTICE
This is a warning against anything which may cause damage to the vehi ...
