Dtc B1205 Afs Ecu Communication Stop
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT FUSE (H-LP LVL)
CHECK WIRE HARNESS (AFS ECU - BATTERY AND BODY GROUND)
CHECK RESISTANCE OF COMMUNICATION LINE
DTC B1205 AFS ECU Communication Stop |
DESCRIPTION
- This DTC is detected when communication between the AFS ECU and the gateway ECU stops for more than 10 seconds.
DTC No.
| DTC Detection Condition
| Trouble Area
|
B1205
| AFS ECU communication stops
| - AFS ECU
- Wire harness
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- When "+B of GND short malfunction of communication bus" DTCs (B1266 and B1267) are detected at the same time as "communication stop" DTC B1205, repair the "+B or GND short malfunction of communication bus" DTCs first.
| 1.INSPECT FUSE (H-LP LVL) |
Remove the H-LP LVL fuse from the main body ECU LH (cowl side J/B LH).
Measure the resistance of the fuse.
- Standard resistance:
- Below 1 Ω
| 2.CHECK WIRE HARNESS (AFS ECU - BATTERY AND BODY GROUND) |
Disconnect the A27 ECU connector.
Turn the engine switch on (IG).
Measure the voltage and resistance of the wire harness side connector.
- Standard voltage:
Tester Connection
| Condition
| Specified Condition
|
IG (A27-2) - Body ground
| Engine switch on (IG)
| 10 to 14 V
|
- Standard resistance:
Tester Connection
| Specified Condition
|
E1 (A27-1) - Body ground
| Below 1 Ω
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 3.CHECK RESISTANCE OF COMMUNICATION LINE |
Disconnect the A27, J58 and J34 ECU connectors.
Measure the resistance between the specified terminals on the wire harness side connectors.
- Standard resistance:
Tester Connection
| Specified Condition
|
MPX1 (A27-5) - MPX- (J58-31)
| Below 1 Ω
|
MPX2 (A27-6) - MPX+ (J34-6)
| Below 1 Ω
|
- Result:
Result
| Proceed to
|
Both are OK
| A
|
One is OK
| B
|
Both are NG
| C
|
| | REPLACE AFS ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
