Troubleshooting For Lost Communication

Troubleshooting for Lost Communication

Circuit Diagram

CAN Communication System Circuit Diagram:

Diagnosis Procedure

NOTE:
- Be sure to perform CAN Communication Check CAN Communication Check before perform this flow.
- Occurrence of multiple troubles is not included in the scope of this trouble diagnosis.

When "Lost Communication" is detected in any control module, perform diagnosing by the following procedure.
1. Connect SUZUKI scan tool to DLC.
2. Push engine switch to change ignition mode to "ON".
3. Select "Communication Bus Check" under "Bus Check" menu of SUZUKI scan tool and check for disabled communicating control module (it is not displayed on screen).
4. Based on above check results, select applicable diagnosis flow code ([a] to [o]) from Diagnosis Flow Selection Table.
5. Perform troubleshooting according to selected diagnosis flow.

Diagnosis Flow Selection Table

NOTE:
- If an individual control module or sensor fails to communicate, check whether power circuit or ground circuit of control module or sensor is in good condition, by referring to system circuit diagram, etc. before diagnosing trouble with flow chart.
- If it is not possible to select suitable diagnosis flow code from Diagnosis Flow Selection Table or "two or more diagnosis flows are selectable", perform Troubleshooting for Communication Bus Off Troubleshooting For Communication Bus OFF
- Diagnosis flows [a] to [o] link with CAN communication lines [a] to [o] of CAN Communication System Circuit Diagram.







Troubleshooting

Diagnosis flow: [a]

Step 1-2:

Diagnosis flow: [b]

Step 1:

Diagnosis flow: [c]

Step 1:

Diagnosis flow: [d]

Step 1:

Diagnosis flow: [e]

Step 1:

Diagnosis flow: [f]

Step 1:

Diagnosis flow: [g]

Step 1:

Diagnosis flow: [h]

Step 1:

Diagnosis flow: [i]

Step 1:

Diagnosis flow: [j]

Step 1-2:

Diagnosis flow: [k]

Step 1-2:

Diagnosis flow: [l]

Step 1:

Diagnosis flow: [m]

Step 1:

Diagnosis flow: [n]

Step 1:

Diagnosis flow: [o]

Step 1: