Open in One Side of CAN Sub Bus Line

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: Open in One Side of CAN Sub Bus Line

Open in One Side of CAN Sub Bus Line

DESCRIPTION

If 2 or more ECUs and/or sensors do not appear on the Techstream "CAN Bus Check" screen, one side of the CAN sub-bus line may be open. (One side of the CAN-H [sub-bus line]/CAN-L [sub-bus line] of the ECU and/or sensor is open.)





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK OPEN IN ONE SIDE OF CAN SUB BUS LINE (SKID CONTROL ECU SUB BUS LINE)




(a) Disconnect the skid control ECU sub bus line connector (J47) from the CAN J/C.

NOTICE:
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.

(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch ON.
(d) Select "CAN Bus Check" on the Techstream Diagnosis System.
Result:





A -- CONNECT CONNECTOR
B -- Continue to next step.

2. CONNECT CONNECTOR
(a) Reconnect the skid control ECU sub bus line connector (J47) to the CAN J/C.
NEXT -- Continue to next step.

3. CHECK OPEN IN ONE SIDE OF CAN SUB BUS LINE (STEERING ANGLE SENSOR SUB BUS LINE)




(a) Disconnect the steering angle sensor sub bus line connector (J49) from the CAN J/C.

NOTICE:
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.

(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch ON.
(d) Select "CAN Bus Check" on the Techstream Diagnosis System.
Result:





A -- CONNECT CONNECTOR
B -- Continue to next step.

4. CONNECT CONNECTOR
(a) Reconnect the steering angle sensor sub bus line connector (J49) to the CAN J/C.
NEXT -- Continue to next step.

5. CHECK OPEN IN ONE SIDE OF CAN SUB BUS LINE (YAW RATE SENSOR SUB BUS LINE)




(a) Disconnect the yaw rate sensor sub bus line connector (J48) from the CAN J/C.
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch ON.
(d) Select "CAN Bus Check" on the Techstream Diagnosis System.
Result:





B -- CHECK CAN J/C
A -- Continue to next step.

6. CONNECT CONNECTOR
(a) Reconnect the yaw rate sensor sub bus line connector (J48) to the CAN J/C.
NEXT -- Continue to next step.

7. CHECK OPEN IN ONE SIDE OF CAN BUS LINE (YAW RATE SENSOR SUB BUS LINE)




(a) Disconnect the yaw rate sensor connector (Y1).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE YAW RATE SENSOR SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)
OK -- REPLACE YAW RATE SENSOR
8. CONNECT CONNECTOR
(a) Reconnect the skid control ECU sub bus line connector (J47) to the CAN J/C.
NEXT -- Continue to next step.

9. CHECK OPEN IN ONE SIDE OF CAN SUB BUS LINE (SKID CONTROL ECU SUB BUS LINE)




(a) Disconnect the skid control ECU connector (S28).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE SKID CONTROL ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)
OK -- REPLACE MASTER CYLINDER SOLENOID
10. CONNECT CONNECTOR
(a) Reconnect the steering angle sensor sub bus line connector (J49) to the CAN J/C.
NEXT -- Continue to next step.

11. CHECK OPEN IN ONE SIDE OF CAN SUB BUS LINE (STEERING ANGLE SENSOR SUB BUS LINE)




(a) Disconnect the steering angle sensor connector (S11).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE STEERING ANGLE SENSOR SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)
OK -- REPLACE STEERING ANGLE SENSOR
12. CHECK CAN J/C




(a) Disconnect connectors (J47), (J48), (J49), (J50) and (J51) from the CAN J/C.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE CAN J/C
OK -- REPLACE ECM