Dtc P0601: Internal Control Module Memory Check Sum Error; Dtc P1450 (No.29): Barometric Pressure Sensor Circuit Malfunction - Suzuki Liana RH418 Supplementary Service Manual

DTC P0601: Internal Control Module Memory Check Sum Error

System Description
Internal control module is installed in ECM.
DTC Detecting Condition and trouble Area
DTC detecting condition
Data write error or check sum error
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

System Description
Barometric pressure sensor is installed in ECM.
DTC Detecting Condition and Possible Cause
DTC detecting condition
DTC P1450:
Barometric pressure: Sensor voltage is 4.7 V or higher, or 1.6 V
or lower.
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
Step
1 Was "Engine and Emission Control System Check"
performed?
Action
Engine General Information and Diagnosis:
Possible cause
ECM
Possible cause
• ECM (barometric pressure sensor) malfunction
Yes
Substitute a known-
good ECM and recheck.
1A-70
S3RH0B1104038
S3RH0B1104039
No
Go to "Engine and
Emission Control
System Check".