Hyundai Santa Fe (2006 year). Manual — part 583
FLA -398
FUEL SYSTEM
DTC P0420 CATALYST SYSTEM
EFFICIENCY BELOW THRESHOLD (BANK 1)
DTC P0430 CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD
(BANK 2)
GENERAL DESCRIPTION
EBD941FC
The ECM uses dual oxygen sensors to monitor the efficiency of the manifold catalytic converter (warm-up catalytic con-
verter). By monitoring the oxygen storage capacity of a catalyst, its efficiency can be indirectly calculated. The upstream
(front) HO2S is used to detect the amount of oxygen in the exhaust gas before it enters the catalytic converter. A low
voltage indicates high oxygen contents (lean air mixture). A high voltage indicates low oxygen contents (rich air mixture).
When the catalyst efficiency drops, no chemical reaction takes place. This means the concentration of oxygen will be the
same at the rear as it is at the front.
DTC DESCRIPTION
ED6771A8
If the oxygen storage time for Bank 1 is lower than threshold , the PCM determines that a fault exists and a DTC is stored
and MIL(Malfunction Indication Lamp) turns on.
DTC DETECTING CONDITION
E28777BF
Item
Detecting Condition
Possible cause
DTC Strategy
• Manipulates Airfuel and stores the times it takes for
the pre and post converter oxygen sensors to switch.
EnableConditions
• Engine Runtime ≥ 580 sec.
• Purge Concentration Learned
• 3 g/s ≤ Airflow ≤ 10 g/s
• Throttle closed ≤ 1.5%
• 70℃(158 F) ≤ Coolant Temp. ≤ 120℃(248 F)
• -7℃(19.4 F) ≤ Ambient Temp. ≤ 105℃(221 F)
• Barometer ≥ 72 kPa
• Max number of test attempts ≤ 12
• Closed Loop
• 250℃( 482 F) ≤ Catalyst Temp. ≤ 950℃(1742 F)
• Fuel learning completed
• Vehicle speed ≤ 3 kph(1.8 mph)
• Not airfuel ramping
• Max idle time( about 60 sec.) not exceeded
• No disabling faults present
• No instrumentation slews active
Threshold value
• Oxygen Storage Time < 3.25 sec.
DiagnosisTime
• 15 sec.
MIL On Condition
• 1 Driving cycle
• Catalyst Converter
MONITOR SCANTOOL DATA
E2E931EC
1.
Check DTC Status
1)
Connect scantool to Data Link Connector(DLC).
2)
IG "ON".
DTC TROUBLESHOOTING PROCEDURES
FLA -399
3)
Select "Diagnostic Trouble Codes(DTCs)" mode, and then Press F4(DTAL) to check DTC’s information from the
DTCs menu
4)
Read "DTC Status" parameter.
LGLG311A
5)
Is parameter displayed "Present fault"?
YES
▶ Substitute with a known - good Catalyst Converter and check for proper operation. If the problem is corrected,
Go to "Verification of Vehicle Repair" procedure.
NO
▶ Go to "Component Inspection" procedure.
COMPONENT INSPECTION
EC580A1F
1.
Monitor the Catalyst Converter
1)
IG "OFF" and then reset the PCM.
2)
Start the engine and warm it up until the radiator fan comes on( more than at least 10 minutes).
3)
Drive at a steady speed between 45-55 mph(72-88 km/h) for 30 seconds.
4)
Stop and then maintain idle state for 30 seconds in D-position.
5)
Repeat step 3 once again.
6)
Stop and then keep it in idle state( D-positon) for 30 seconds.
7)
IG "OFF"
8)
Repeat steps 3 through 7 three times.
9)
Check if catalyst monitoring readiness is complete. so, if the readiness is incomplete, repeat steps 2 through 8.
10) Does the scan tool show DTC P0420?
YES
FLA -400
FUEL SYSTEM
▶ Substitute with a known - good Catalyst Converter and check the signal waveform of HO2S for proper oper-
ation. If the problem is corrected, Go to "Verification of Vehicle Repair" procedure.
NO
▶ It was intermittent failure.
VERIFICATION OF VEHICLE REPAIR
E504AFAE
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 -401
DTC P0444 EVAP. EMISSION SYSTEM-PURGE CTRL. VALVE CIRCUIT
OPEN
COMPONENT LOCATION
E330C105
PCSV
LGLG518A
GENERAL DESCRIPTION
E9E8ED36
The evaporative emission control system prevents hydrocarbon (HC) vapors from the fuel tank from escaping into the
atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The
ECM controls the Purge Control Solenoid Valve (PCSV) to purge any collected vapors from the canister back to the
engine for combustion. This valve is actuated by the purge control signal from the ECM and controls fuel vapor from the
canister to the intake manifold.
DTC DESCRIPTION
E1673907
Checking output signals from PCSV every 10 sec. under detecting condition, if signals indicating open or short to ground
in the circuit are detected for more than 5 sec., PCM sets P0444. MIL(Malfunction Indication Lamp) turns on when the
malfunction lasts till consecutive 2 driving cycle.
DTC DETECTING CONDITION
E6795A6C
Item
Detecting Condition
Possible cause
DTC Strategy
• Open, short to ground
EnableConditions
• Engine running state
• 11V ≤ Battery voltage ≤ 16V
• Above enable conditions are met > 0.5 sec.
Threshold value
• Open or short to ground
DiagnosisTime
• Continuous
(More than 5 sec.failure for every 10 sec.test)
MIL On Condition
• 2 driving cycles
• Poor connection
• Open or short to ground
in harness
• PCSV
• PCM
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