Dtc No. 33: Control Module Communication Bus Off - Suzuki Swift Sport 2004 Service & Repair Manual

Step
8 DTC check of keyless start control module
1) Turn ignition switch to OFF position.
2) Disconnect connector of any one of control module other
than keyless start control module.
3) Recheck keyless start control module for DTC.
Is DTC No.31 detected?

DTC No. 33: Control Module Communication Bus Off

Wiring Diagram
Refer to "DTC No. 31: Lost Communication with BCM".
DTC Detecting Condition and Trouble Area
DTC detecting condition
Communication is not available with all control modules
connected by CAN
DTC Confirmation Procedure
1) Clear DTC referring to "DTC Clearance".
2) Start engine and run it for 1 min. or more.
3) Check DTC referring to "DTC Check".
Troubleshooting
Step
1 Was "Keyless Start System Check" performed?
2 Control module connector check
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Recheck keyless start control module for DTC.
Is DTC No. 33 detected?
Action
• CAN communication circuit
• Combination meter
• Keyless start control module
• BCM
• TCM (A/T model)
• ECM
• ABS control module
Action
Keyless Start System:
Yes
Using same method,
disconnect connectors
of control module other
than keyless start
control module one by
one to check if DTC
No.31 is detected.
If DTC No.31 is
detected even through
connector of control
module other than
keyless start control
module is disconnected,
substitute a known-
good keyless start
control module and
recheck.
Trouble area
Yes
Go to Step 2.
Go to Step 3.
10E-27
No
Check power and
ground circuit of
disconnected control
module and recheck. If
circuit is OK, substitute
a known-good
disconnected control
module and recheck.
S7RS0BA504021
No
Go to "Keyless Start
System Check".
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".