Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000VJF0 |
Model Year Start: 2016 |
Model: Sienna |
Prod Date Range: [12/2015 -
] |
Title: NETWORKING: LIN COMMUNICATION SYSTEM: B2287,B278C; LIN Communication Master Malfunction; 2016 - 2020 MY Sienna [12/2015 - ] |
DTC
|
B2287
|
LIN Communication Master Malfunction
|
DTC
|
B278C
|
Lost Communication with Power Source Control
|
DESCRIPTION
-
DTC 2287 is stored when there is an open or short circuit or an ECU communication malfunction between the certification ECU (smart key ECU) and power management control ECU.
-
DTC 278C is stored when LIN communication between the certification ECU and power management control ECU stops for 10 seconds or more.
DTC Code
|
DTC Detection Condition
|
Trouble Area
|
B2287
|
There is an open or short circuit or an ECU communication malfunction between the certification ECU (smart key ECU) and power management control ECU.
|
-
Power management control ECU
-
Certification ECU (smart key ECU)
-
Harness or connector
|
B278C
|
No communication between the certification ECU (smart key ECU) and power management control ECU for more than 10 seconds.
|
-
Power management control ECU
-
Certification ECU (smart key ECU)
-
Harness or connector
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
PROCEDURE
(a) Clear DTCs (See page
).
NEXT
|
|
|
(a) Check for DTCs (See page
).
Result
Result
|
Proceed to
|
B2287 or B278C are output
|
A
|
B2287 or B278C and B2785 are output
|
B
|
HINT:
When both B2287 or B278C and B2785 are output at the same time, troubleshoot B2785 first.
B |
|
GO TO DIAGNOSTIC TROUBLE CODE CHART
(See page
)
|
A
|
|
|
3.
|
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - POWER MANAGEMENT CONTROL ECU)
|
(a) Disconnect the D88 certification ECU (smart key ECU) and D89 power management control ECU connectors.
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Tester Connection
|
Condition
|
Specified Condition
|
D88-29 (LIN) - D89-24 (LIN2)
|
Always
|
Below 1 Ω
|
Standard Resistance (Check for Short):
Tester Connection
|
Condition
|
Specified Condition
|
D88-29 (LIN) - Body ground
|
Always
|
10 kΩ or higher
|
Text in Illustration
*a
|
Front view of wire harness connector
(to Certification ECU (Smart Key ECU))
|
*b
|
Front view of wire harness connector
(to Power Management Control ECU)
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
4.
|
CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY AND BODY GROUND)
|
(a) Disconnect the D89 power management control ECU connector.
|
|
(b) Measure the resistance and voltage according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
D89-5 (GND2) - Body ground
|
Always
|
Below 1 Ω
|
D89-6 (GND) - Body ground
|
Always
|
Below 1 Ω
|
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
D89-1 (AM22) - Body ground
|
Always
|
11 to 14 V
|
D89-2 (AM21) - Body ground
|
Always
|
11 to 14 V
|
Text in Illustration
*a
|
Front view of wire harness connector
(to Power Management ECU)
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
5.
|
REPLACE POWER MANAGEMENT CONTROL ECU
|
(a) Replace the power management control ECU with a normally functioning part (See page
).
(b) Clear the DTC (See page
)
NEXT
|
|
|
(a) Check for DTCs (See page
).
Result
Result
|
Proceed to
|
B2287 or B278C are output
|
A
|
B2287 or B278C and B2785 are output
|
B
|
A |
|
END (POWER MANAGEMENT CONTROL ECU IS MALFUNCTIONING)
|
B |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU)
(See page
)
|
|