Dtc P1676: Can Communication (Reception Error For Tcm) - Suzuki Swift Sport 2004 Service & Repair Manual

1A-148 Engine General Information and Diagnosis:

DTC P1676: CAN Communication (Reception Error for TCM)

Wiring Diagram
Refer to "DTC P1674: CAN Communication (Bus Off Error)".
DTC Detecting Condition and Trouble Area
DTC detecting condition
Reception error of communication data for TCM is
detected for longer than specified time continuously.
(1 driving detection logic)
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC by using scan tool.
3) Start engine and run it for 1 min. or more.
4) Check DTC.
DTC Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors referring to "Inspection of ECM and Its Circuits".
• Upon completion of inspection and repair work, perform "DTC Confirmation Procedure" and
confirm that the trouble has been corrected.
Step
1 Was "Engine and Emission Control System Check"
performed?
2 Check CAN communication error for ECM
1) Check ECM for DTC.
Is there DTC P1674?
3 ECM and TCM connector check
1) Check for proper connection at each ECM and TCM
connector terminals with ignition switch turned OFF.
2) If connections are OK, recheck ECM for DTC with
engine running.
Is there DTC P1676?
4 DTC check in TCM
1) Check DTC P1774 in TCM.
Is it indicated?
5 CAN communication circuit check
1) Disconnect connectors of ECM and TCM.
2) Check CAN communication circuit between ECM and
TCM connectors for open, short and high resistance.
Is each CAN communication circuit in good condition?
6 DTC check of ECM
1) Connect connectors to ECM and TCM with ignition
switch turned.
2) Check ECM for DTC.
Does ECM communicate with control module other than
TCM (i.e. DTC P1678 and/or P1685 are not detected)?
Action
Trouble area
• ECM
• TCM (for A/T model)
• CAN communication circuit
Yes
Go to Step 2.
Go to "DTC P1674:
CAN Communication
(Bus Off Error)".
Go to Step 4.
Go to "DTC P1774:
CAN Communication
Bus Off in Section 5A".
Go to Step 6.
Substitute a known-
good TCM and recheck.
S7RS0B1104064
No
Go to "Engine and
Emission Control
System Check".
Go to Step 3.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".
Go to Step 5.
Repair circuit.
Substitute a known-
good ECM and recheck.