Suzuki Liana RH418, Supplementary Service Manual

Page: 83 / 371

Engine General Information and Diagnosis: 1A-70
DTC P0601: Internal Control Module Memory Check Sum Error
S3RH0B1104038
System Description
Internal control module is installed in ECM.
DTC Detecting Condition and trouble Area
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch, clear DTC using scan tool and then turn OFF ignition switch.
3) Start engine and run it at idle for 30 sec. or more if possible.
4) Check DTC.
DTC Troubleshooting
Substitute a known-good ECM and recheck.
DTC P1450 (No.29): Barometric Pressure Sensor Circuit Malfunction
S3RH0B1104039
System Description
Barometric pressure sensor is installed in ECM.
DTC Detecting Condition and Possible Cause
DTC Confirmation Procedure
1) Turn ignition switch OFF.
2) Clear DTC with ignition switch ON.
3) Turn ignition switch ON for 2 sec., crank engine for 2 sec. and run it at idle for 1 min.
4) Check DTC.
DTC Troubleshooting
DTC detecting condition Possible cause
Data write error or check sum error ECM
DTC detecting condition Possible cause
DTC P1450:
Barometric pressure: Sensor voltage is 4.7 V or higher, or 1.6 V
or lower.
• ECM (barometric pressure sensor) malfunction
Step Action Yes No
1 Was “Engine and Emission Control System Check”
performed? Substitute a known-
good ECM and recheck. Go to “Engine and
Emission Control
System Check”.