Can Communication System Ecm Communication Stop Mode
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK CAN BUS LINE FOR DISCONNECTION (ECM SUB BUS LINE)
CHECK WIRE HARNESS (+B1, +B, E)
CAN COMMUNICATION SYSTEM - ECM Communication Stop Mode |
DESCRIPTION
Detection Item
| Symptom
| Trouble Area
|
ECM COMMUNICATION STOP MODE
| - "ENGINE AND ECT" is not displayed on the "Communication Bus Check" of the intelligent tester
- Applies to "ECM COMMUNICATION STOP MODE" in the "DTC COMBINATION TABLE"
| - Power source or inside the ECM
- ECM sub bus line or connector
|
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK CAN BUS LINE FOR DISCONNECTION (ECM SUB BUS LINE) |
Turn the engine switch off.
Disconnect the ECM connector (A6).
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection
| Condition
| Specified Value
|
A6-25 (CANH) - A6-24 (CANL)
| Engine switch off
| 54 to 69 Ω
|
| | REPAIR OR REPLACE ECM SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L) |
|
|
| 2.CHECK WIRE HARNESS (+B1, +B, E) |
Disconnect the ECM connectors (A6) and (E7).
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection
| Condition
| Specified Value
|
E7-7 (E1) - Body ground
| Always
| Below 1 Ω
|
Measure the voltage according to the value(s) in the table below.
- Standard voltage:
Tester Connection
| Condition
| Specified Value
|
A6-5 (+B1) - Body ground
| Engine switch off
| 10 to 14 V
|
A6-6 (+B) - Body ground
| Engine switch off
| 10 to 14 V
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
