Suzuki Swift Sport 2004 User Manual

Automatic Transmission/Transaxle: 5A-73
DTC P1777: TCM Lost Communication with ECM (Reception Error)
S7RS0B5104040
Wiring Diagram
Refer to “DTC P1774: CAN Communication Bus Off”
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTC.
3) Start engine and run it for 1 min. or more.
4) Check DTC.
DTC Troubleshooting
NOTE
Upon completion of inspection and repair work, perform “DTC Confirmation Procedure:” and confirm
that the trouble has been corrected.
DTC detecting condition Trouble area
Reception error of communication data for ECM is detected more than specified
time continuously.
•ECM
•TCM
• CAN circuit
Step Action Yes No
1 Was “A/T System Check” performed? Go to Step 2. Go to “A/T System
Check”.
2 Control module connector check
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Recheck DTC.
Is there DTC P1777?
Go to Step 3. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
3 DTC check
1) Check ECM for DTC referring to “DTC Check in Section
1A”.
Is there DTC P1674?
Go to “DTC P1674:
CAN Communication
(Bus Off Error) in
Section 1A”.
Check ECM power and
ground circuit. If circuit
is OK, CAN
communication circuit
between ECM and ABS
hydraulic unit / control
module is open circuit.
4 CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules
communicating by means of CAN.
3) Check CAN communication circuit between control
modules for open, short and high resistance.
Is each CAN communication circuit in good condition?
Check TCM power and
ground circuit. If circuit
is OK, substitute a
known-good TCM and
recheck.
Repair circuit.

Suzuki Swift Sport 2004 Specifications

General

Brand	Suzuki
Model	Swift Sport 2004
Category	Automobile
Language	English