Suzuki Liana RH413, Service Manual

Page: 150 / 1302

1A-99 Engine General Information and Diagnosis:
DTC P0601: Internal Control Module Memory Check Sum Error
S3RH0A1104078
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 and pending DTC.
DTC Troubleshooting
Substitute a known-good ECM and recheck.
DTC P1450 (No.29) / P1451: Barometric Pressure Sensor Low / High Input / Performance Problem
S3RH0A1104060
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 pending DTC and DTC.
DTC Troubleshooting (DTC P1450)
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
DTC P1451:
• Vehicle stopped
• Engine cranking
• Difference between barometric pressure and intake manifold absolute
pressure is 26 kPa, 200 mmHg or more.
• Difference between intake manifold absolute pressure at engine start
and the pressure after engine start is 1.3 kPa, 10 mmHg or less.
*2 driving cycle detection logic, monitoring once / 1 driving
• Manifold absolute pressure sensor and
its circuit malfunction
• 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”.