Hyundai Santa Fe (2006 year). Manual — part 641
FLA -630
FUEL SYSTEM
▶ Go to "Check fuel filter" as follows.
NO
▶ Substitute with a known - good HO2S and check for proper operation.
If the problem is corrected, go to "Verification of Vehicle Repair" procedure.
3.
Check the fuel filter of fuel pump
1)
IG "OFF" and disconnect the fuel pump connector.
2)
Start the engine and wait until fuel in fuel line is exhausted. After the engine stalls, IG "OFF"
3)
Remove the fuel pump assembly.
4)
Check the fuel filter for clogging by dust, a foreign substance.
5)
Is the fuel filter O.K.?
YES
▶ Substitute with a known - good PCM and check for proper operation.
If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" procedure.
NO
▶ Substitute with a known - good fuel filter and check for proper operation.
If the problem is corrected, go to "Verification of Vehicle Repair" procedure.
NOTE
There is a memory reset function on scantool that can erase optional parts automatically detected and memorized
by PCM. Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others.
VERIFICATION OF VEHICLE REPAIR
E538C54C
After a repair, it is essential to verify that the fault has been corrected.
1.
Monitor and record the Freeze Frame Data for the Diagnostic Trouble Code(DTC) which has been diagnosed.
2.
Using a Scantool, Clear the DTCs
3.
Operate the vehicle within conditions noted in the freeze frame data or enable conditions
4.
Monitor that all rediness test have been verified as " Complete "
5.
Are any DTCs present ?
YES
▶ Go to the applicable troubleshoooting procedure.
NO
▶ System is performing to specification at this time.
DTC TROUBLESHOOTING PROCEDURES
FLA -631
DTC P2271 O2 SENSOR SIGNAL STUCK RICH (BANK 1 / 2 SENSOR 1)
COMPONENT LOCATION
EA3D78C1
Refer to DTC P2270.
GENERAL DESCRIPTION
EFC7EA8D
Refer to DTC P2270.
DTC DESCRIPTION
EEBEAC61
Checking output signals from HO2S under detecting condition, if HO2S’s signal is rich during fuel cut-off conditions, PCM
sets P2271. MIL(Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.
DTC DETECTING CONDITION
EA11B8E6
Item
Detecting Condition
Possible cause
DTC Strategy
• Monitor HO2S’s signal
Enable Conditions
• Battery voltage ≥ 10V
• Engine running ≥ 60sec.
• Fuel cut-off conditions
• Engine warm-up state
• Not in Transient Conditions
Threshold value
• HO2S’s signal > 0.42V
Diagnosis Time
• Continuous
(More than 8 sec. failure for every 9 sec. Test)
MIL On Condition
• 2 Driving Cycles
• Poor Connection
• Faulty HO2S
• Faulty PCM
SPECIFICATION
E92C9C03
Refer to DTC P2270.
SCHEMATIC DIAGRAM
E181B282
Refer to DTC P2270.
SIGNAL WAVEFORM AND DATA
E9EBFE74
Refer to DTC P2270.
MONITOR DTC STATUS
E62EEA8B
Refer to DTC P2270.
COMPONENT INSPECTION
E4CCDBB3
1.
Check the condition of HO2S
1)
Check HO2S for poor connection or loose terminal.
FLA -632
FUEL SYSTEM
2)
Check if HO2S is ensurely installed.
3)
Is the conditions of HO2S normal ?
YES
▶ Go to "Check the Signal waveform of HO2S" as follows.
NO
▶ Repair it and then go to "Verification of Vehicle Repair" procedure.
2.
Check the Signal waveform of HO2S
1)
IG "OFF" and connect HO2S connector.
2)
Engine start.
3)
After warming-up, monitor signal waveform of HO2S with scantool.?
Fig) Signal waveform of front(the upper) and rear(the lower) HO2S at idle
SCMF16225L
4)
Is the sensor switching properly?
YES
▶ Substitute with a known - good PCM and check for proper operation.
If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" procedure.
NO
▶ Substitute with a known - good HO2S and check for proper operation.
If the problem is corrected, go to "Verification of Vehicle Repair" procedure.
NOTE
There is a memory reset function on scantool that can erase optional parts automaticallydetected and memorized by
PCM. Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others.
VERIFICATION OF VEHICLE REPAIR
E375662C
Refer to DTC P2270.
DTC TROUBLESHOOTING PROCEDURES
FLA -633
DTC P2272 HO2S SIGNAL STUCK LEAN (BANK 2 / SENSOR 2)
COMPONENT LOCATION
E102FFFA
HO2S [Bank 2/Sensor 2]
SCMF16176L
GENERAL DESCRIPTION
E19C9915
The rear heated oxygen sensor is mounted on the rear side of the Catalytic Converter (warm-up catalytic converter) or
in the rear exhaust pipe, which is able to detect catalyst efficiency. The rear heated oxygen sensor (HO2S) produces a
voltage between 0V and 1V. This rear heated oxygen sensor is used to estimate the oxygen storage capability. If a catalyst
has good conversion properties, the oxygen fluctuations are smoothed by the oxygen storage capacity of the catalyst. If
the conversion provided by the catalyst is low due to aging, poisoning or misfiring, then the oxygen fluctuations are similar
to signals from the front oxygen sensor.
DTC DESCRIPTION
EA1F9A79
Checking output signals from HO2S under detecting condition, if HO2S’s signal is lean during power enrichment condi-
tions, PCM sets P2272. MIL(Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving
cycle.
DTC DETECTING CONDITION
E544989E
Item
Detecting Condition
Possible cause
DTC Strategy
• Monitor HO2S’s signal
Enable Conditions
• Battery voltage ≥ 10V
• Engine running ≥ 60sec.
• Power Enrichment conditions
• Engine warm-up state
• Not in Transient Conditions
Threshold value
• HO2S’s signal < 0.35V and Air Fuel Ratio ≤ 13.5
Diagnosis Time
• Continuous
(More than 8 sec. failure for every 9 sec. Test)
MIL On Condition
• 2 Driving Cycles
• Poor Connection
• Faulty HO2S
• Clogging of fuel filter in
fuel pump
• Faulty PCM
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