Dtc P2227 / P2228 / P2229: Barometric Pressure Circuit Performance / Low / High - Suzuki 2006 SX4 Service Manual

1A-124 Engine General Information and Diagnosis:
DTC Troubleshooting
Step
1 Was "Engine and Emission Control System Check"
performed?
2 DTC check
Is there any DTC(s)?
3 A/F sensor circuit check
1) Disconnect connector from A/F sensor with ignition
switch turned OFF.
2) Check for proper terminal connection to A/F sensor
connector.
3) If connections are OK, check that A/F sensor circuit is as
follows.
• Wiring harness resistance of each "Signal (+) circuit of
A/F sensor" and "Signal (–) circuit of A/F sensor" is
less than 1 Ω.
Is it in good condition?

DTC P2227 / P2228 / P2229: Barometric Pressure Circuit Performance / Low / High

System Description
Barometric pressure sensor is installed in ECM.
DTC Detecting Condition and Trouble Area
DTC detecting condition
DTC P2227:
Difference between barometric pressure value and estimated
barometric pressure (according engine load rate and engine
speed) is more than 25 kPa for 1.25 sec.
(2 driving cycle detection logic, monitoring once per driving cycle)
DTC P2228:
Output signal of barometric pressure sensor is higher than 4.7 V
for 0.5 sec.
(1 driving cycle detection logic)
DTC P2229:
Output signal of barometric pressure sensor is lower than 1.95 V
for 0.5 sec.
(1 driving cycle detection logic)
DTC Confirmation Procedure
DTC P2227 / P2228 / P2229
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC and freeze frame data by using scan tool and warm up engine to normal
operating temperature.
3) Check DTC and pending DTC.
DTC Troubleshooting
Step
1 Was "Engine and Emission Control System Check"
performed?
2 DTC check
Is there any DTC(s) other than P2227, P2228 and P2229?
Action
Action
Yes
Go to Step 2.
Go to applicable DTC.
Replace A/F sensor and
recheck. If this DTC is
detected again,
substitute a known-
good ECM.
Trouble area
• Barometric pressure sensor in ECM
Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
No
Go to "Engine and
Emission Control
System Check".
Go to Step 3.
Repair or replace
defective wiring harness
/ connector.
S6RW0C1104077
No
Go to "Engine and
Emission Control
System Description".
Substitute a known
good ECM and recheck.