Hyundai: Engine D4FA. Manual — part 154
DIESEL CONTROL SYSTEM
FLA -487
DTC P2239 LAMBDA SENSOR PUMPING CURRENT CIRCUIT HIGH (BANK
1 / SENSOR 1)
COMPONENT LOCATION
ED38DDD8
Refer to DTC P2238.
GENERAL DESCRIPTION
E13561E3
Refer to DTC P2238.
DTC DESCRIPTION
E52BEB28
P2239 is set when 1) short to battery in signal line(terminal 4), ground line(terminal 3), power line(terminal 1), pumping
current line(terminal 6) or 2) short to ground is detected. This code is due to the problem of Lambda sensor circuit.
DTC DETECTING CONDITION
E82B2917
Item
Detecting Condition
Possible Cause
DTC Strategy
• Voltage monitoring
Enable Conditions
• Engine running
ThresholdValue
• Short to battery in Lambda sensor circuit
• Open in Lambda sensor circuit
DiagnosticTime
• 2.0 sec.
Fuel Cut
NO
EGR Off
NO
Fuel Limit
NO
Fail Safe
MIL
NO
• Lambda sensor circuit
• Lambda sensor component
SPECIFICATION
EDA711EA
Refer to DTC P2238.
SCHEMATIC DIAGRAM
E8942733
Refer to DTC P2238.
SIGNAL WAVEFORM AND DATA
E4F4275E
Refer to DTC P2238.
TERMINAL AND CONNECTOR INSPECTION
E3F38081
Refer to DTC P2238.
POWER CIRCUIT INSPECTION
EFEF42E5
1.
Check voltage & waveform in sensor power circuit
FLA -488
FUEL SYSTEM
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect Lambda sensor connector.
3)
IG KEY "ON".
4)
Measure the voltage of Lambda sensor connector terminal 1.
5)
Monitor the waveform in Lambda sensor connector terminal 1.
Specification : Measured voltage : 2.0 V
waveform : Refer to "Signal Waveform & Data" of "General Information". The waveform similar to Fig.1) is displayed.
6)
Is the measured voltage within the specification?
YES
▶ Go to "Signal Circuit Inspection".
NO
▶ No voltage detected in Lambda sensor power circuit : Go to "2. Check open in sensor power circuit" as follows.
▶ High voltage detected in Lambda sensor power circuit : Repair short to battery in Lambda sensor power circuit
and go to "Verification of Vehicle Repair".
2.
Check open in Lambda sensor power circuit
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect Lambda sensor connector and ECM connector.
3)
Check continuity between Lambda sensor connector terminal 1 and ECM connector terminal 64.
Specification : Continuity(below 1.0Ω )
4)
Is the measured voltage within the specification?
YES
▶ Repair short to ground in Lambda sensor power circuit and go to "Verification of Vehicle Repair".
NO
▶ Reapir open in Lambda sensor power circuit and go to "Verification of Vehicle Repair".
SIGNAL CIRCUIT INSPECTION
EB8FC1D4
1.
Check voltage in sensor signal circuit
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect Lambda sensor connector.
3)
IG KEY "ON".
4)
Measure the voltage of Lambda sensor connector terminal 4.
Specification : 0.8V~0.9 V
DIESEL CONTROL SYSTEM
FLA -489
5)
Is the measured voltage within the specification?
YES
▶ Go to "3. Check sensor pump circuit".
NO
▶ No voltage detected in Lambda sensor signal circuit : Go to "2. Check open in sensor signal circuit" as follows.
▶ High voltage detected in Lambda sensor power circuit : Repair short to battery in Lambda sensor signal circuit
and go to "Verification of Vehicle Repair".
2.
Check open in Lambda sensor signal circuit
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect Lambda sensor connector and ECM connector.
3)
Check continuity between Lambda sensor connector terminal 4 and ECM connector terminal 87.
Specification : Continuity (below 1.0Ω )
4)
Is the measured resistance within the specification?
YES
▶ Repair short to ground in Lambda sensor signal circuit and go to "Verification of Vehicle Repair".
NO
▶ Repair open in Lambda sensor signal circuit and go to "Verification of Vehicle Repair".
3.
Check voltage in sensor pump circuit
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect Lambda sensor connector.
3)
IG KEY "ON".
4)
Measure the voltage of Lambda sensor connector terminal 6.
Specification : 0.8V~0.9 V
5)
Is the measured voltage within the specification?
YES
▶ Go to "Ground Circuit Inspection".
NO
▶ No voltage detected in Lambda sensor pumpl circuit : Go to "4. Check open in sensor pump circuit" as follows.
▶ High voltage detected in Lambda sensor power circuit : Repair short to battery in Lambda sensor pump circuit
and go to "Verification of Vehicle Repair".
4.
Check open in sensor pump circuit
1)
IG KEY "OFF", ENGINE "OFF".
FLA -490
FUEL SYSTEM
2)
Disconnect Lambda sensor connector and ECM connector.
3)
Check continuity between Lambda sensor connector terminal 6 and ECM connector terminal 65.
Specification : Continuity (below 1.0Ω )
4)
Is the measured resistance within the specification?
YES
▶ Repair short to ground in Lambda sensor pump circuit and go to "Verification of Vehicle Repair".
NO
▶ Repair open in Lambda sensor pump circuit and go to "Verification of Vehicle Repair".
GROUND CIRCUIT INSPECTION
ED2C2CEB
1.
Check voltage in sensor ground circuit
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect Lambda sensor connector.
3)
IG KEY "ON".
4)
Measure the voltage of Lambda sensor connector terminal 3.
Specification : 2.3V~2.7V
5)
Is the measured voltage within the specification?
YES
▶ Go to"Component Inspection".
NO
▶ No voltage detected in Lambda sensor ground circuit : Go to "2. Check open in sensor ground circuit" as
follows.
▶ High voltage detected in Lambda sensor ground circuit : Repair short to battery in Lambda sensor ground
circuit and go to "Verification of Vehicle Repair".
2.
Check open in sensor ground circuit
1)
IG KEY "OFF", ENGINE "OFF".
2)
Disconnect Lambda sensor connector and ECM connector.
3)
Check continuity between Lambda sensor connector terminal 3 and ECM connector terminal 86.
Specification : Continuity (below 1.0Ω )
4)
Is the measured resistance within the specification?
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