DESCRIPTION
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B2287 |
There is an open or short circuit or an ECU communication malfunction between the power management control ECU and certification ECU. |
|
B278C |
No communication between the certification ECU and power management control ECU for 10 seconds or more. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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.
HINT:
When DTC B2287, B278C and B2785 are output simultaneously, perform troubleshooting
for DTC B2785 first (See page ).
PROCEDURE
1. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
2. |
CHECK FOR DTC |
(a) Check for DTCs (See page ).
OK:
DTC B2287 or B278C is not output.
OK | ![]() |
USE SIMULATION METHOD TO CHECK |
|
3. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - POWER MANAGEMENT CONTROL ECU) |
(a) Disconnect the F79 certification ECU connector.
(b) Disconnect the F80 power management control ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F79-29 (LIN) - F80-24 (LIN2) |
Always |
Below 1 Ω |
F79-29 (LIN) or F80-24 (LIN2) - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY AND BODY GROUND) |
(a) Disconnect the F80 power management control ECU connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F80-5 (GND2) - Body ground |
Always |
Below 1 Ω |
F80-6 (GND) - Body ground |
Always |
Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F80-1 (AM22) - Body ground |
Always |
11 to 14 V |
F80-2 (AM21) - Body ground |
Always |
11 to 14 V |
*a |
Rear view of wire harness connector (to Power Management Control ECU) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
REPLACE POWER MANAGEMENT CONTROL ECU |
(a) Temporarily replace the power management control ECU with a new or normally
functioning one (See page ).
|
6. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
7. |
CHECK FOR DTC |
(a) Check for DTCs (See page ).
OK:
DTC B2287 or B278C is not output.
OK | ![]() |
END (POWER MANAGEMENT CONTROL ECU IS DEFECTIVE) |
NG | ![]() |
REPLACE CERTIFICATION ECU |
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