Can Communication System (For Lhd) Ecm Communication Stop Mode
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK CAN BUS LINE FOR DISCONNECTION (ECM MAIN BUS WIRE)
CHECK ECM POWER SOURCE CIRCUIT
CAN COMMUNICATION SYSTEM (for LHD) - ECM Communication Stop Mode |
DESCRIPTION
Detection Item
| Symptom
| Trouble Area
|
ECM Communication Stop Mode
| - "Engine" and "ECT" are not displayed on the "Communication Bus Check" screen of the intelligent tester
- Applies to "ECM Communication Stop Mode" in the "DTC COMBINATION TABLE"
| - Power source circuit of the ECM
- ECM main bus wire or connector
- ECM
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- Turn the ignition switch off before measuring the resistance of the CAN main wire and CAN branch wires.
- After the ignition switch is turned off, check that the key reminder warning system and lighting system are not operating.
- Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If doors need to be opened in order to check connectors, open the doors and leave them open.
- HINT:
- Operating the ignition switch, any other switches or any triggers related ECU and sensor communication on the CAN, which would cause resistance reading variations.
| 1.CHECK CAN BUS LINE FOR DISCONNECTION (ECM MAIN BUS WIRE) |
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
- 2AZ-FE:
Tester Connection
| Condition
| Specified Value
|
A24-38 (CANH) - A24-46 (CANL)
| Ignition switch off
| 108 to 132 Ω
|
- 2GR-FE:
Tester Connection
| Condition
| Specified Value
|
A55-38 (CANH) - A55-46 (CANL)
| Ignition switch off
| 108 to 132 Ω
|
| | REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR |
|
|
| 2.CHECK ECM POWER SOURCE CIRCUIT |
Check the ECM power source circuit (2AZ-FE: CAMRY_ACV40 RM000002769001X.htmlor 2GR-FE: CAMRY_ACV40 RM000000WZ005NX.html).
| | REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT |
|
|
