Dtc P2227 / P2228 / P2229: Barometric Pressure Circuit Malfunction - Suzuki Grand Vitara Service Manual

Step
5 Wire harness check
1) Measure voltage between "E23-56" terminal of ECM
connector and engine ground, between "E23-53"
terminal of ECM connector and engine ground with
ignition switch turned ON.
Is each voltage 0 V?
6 Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at "E23-
55", "E23-54", "E23-52" and "E23-51" terminals.
3) If OK, measure resistance between "WHT/BLU" wire
terminal of accelerator pedal position (APP) sensor
assembly connector and vehicle body ground, between
"BLU/GRN" wire terminal of accelerator pedal position
(APP) sensor assembly connector and vehicle body
ground.
Is each resistance infinity?
7 Wire harness check
1) Turn ON ignition switch.
2) Measure voltage between "E23-55" terminal of ECM
connector and engine ground, between "E23-52"
terminal of ECM connector and engine ground.
Is each voltage 0 V?
8 Accelerator pedal position (APP) sensor assembly
check
1) 1)Check accelerator pedal position sensor referring to
"Accelerator Pedal Position (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)
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)
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Action
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Engine General Information and Diagnosis:
Yes
Substitute a known-
good ECM and recheck.
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-210
No
"WHT" wire or "ORN/
GRN" wire is shorted to
other circuit.
"WHT/BLU" wire or
"BLU/GRN" wire is
shorted to other circuit.
"WHT/BLU" wire or
"BLU/GRN" wire is
shorted to other circuit.
Replace accelerator
pedal position (APP)
sensor assembly.
S5JB0A1104062
Trouble area