Dtc P2227 / P2228 / P2229: Barometric Pressure Circuit Malfunction - Suzuki Swift Sport 2004 Service & Repair Manual

Step
6 Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at "E23-
37", "E23-52", "E23-36" and "E23-51" terminals.
3) If OK, measure resistance between "GRN" wire terminal
of APP sensor connector and vehicle body ground,
between "YEL" wire terminal of APP sensor connector
and vehicle body ground.
Is each resistance infinity?
7 Wire harness check
1) Turn ON ignition switch.
2) Measure voltage between "E23-37" terminal of ECM
connector and engine ground, between "E23-36"
terminal of ECM connector and engine ground.
Is each voltage 0 V?
8 APP sensor check
1) Check APP sensor referring to "APP Sensor Assembly
Inspection in Section 1C".
Is output voltage within specified value?

DTC P2227 / P2228 / P2229: Barometric Pressure Circuit Malfunction

DTC P2227: Barometric Pressure Circuit Range / Performance
DTC P2228: Barometric Pressure Circuit Low
DTC P2229: Barometric Pressure Circuit High
System Description
Barometric pressure sensor is installed in ECM.
DTC Detecting Condition and Trouble Area
DTC detecting condition
DTC P2227:
Difference of barometric pressure value and intake manifold
pressure value is higher than specified value while engine
cranking.
(*2 driving cycle detection logic, monitoring once par driving cycle)
DTC P2228:
Barometric pressure signal less than specified value is detected.
(1 driving cycle detection logic)
DTC P2229:
Barometric pressure signal more than specified value is detected.
(1 driving cycle detection logic)
Action
Engine General Information and Diagnosis:
Yes
Go to Step 7.
Go to Step 8.
Substitute a known-
good ECM and recheck.
• Manifold absolute pressure sensor
performance problem
• Barometric pressure sensor in ECM
• Barometric pressure sensor in ECM
1A-173
No
"GRN" wire or "YEL"
wire is shorted to other
circuit.
"GRN" wire or "YEL"
wire is shorted to other
circuit.
Replace APP sensor
assembly.
S7RS0B1104078
Trouble area