Hyundai Santa Fe (2006 year). Manual — part 615
FLA -526
FUEL SYSTEM
DTC P1111 INTAKE AIR TEMPERATURE SENSOR CIRCUIT SHORT -
INTERMITTENT HIGH INPUT
COMPONENT LOCATION
EF01B093
MAFS & IATS
SCMF16185L
GENERAL DESCRIPTION
E0E1407B
The Intake Air Temperature Sensor (IATS) is installed into the Mass Air Flow Sensor (MAFS). The IATS uses a thermistor
whose resistance changes with the temperature. The electrical resistance of the IATS decreases as the temperature
increases, and increases as the temperature decreases. The 5 V power source in the ECM is supplied to the IATS via
a resistor in the ECM. That is, the resistor in the ECM and the thermistor in the IATS are connected in series. When
the resistance value of the thermistor in IATS changes according to the intake air temperature, the signal voltage also
changes. Using this signal, the information of the intake air temperature, the ECM corrects basic fuel injection duration
and ignition timing.
DTC DESCRIPTION
E0F8336B
Checking output signals of IATS every 120 sec. under detecting condition, if an ouput signal is over 4.9V for more than 4
sec., PCM sets P1111.
DTC TROUBLESHOOTING PROCEDURES
FLA -527
DTC DETECTING CONDITION
E1AFC8CB
Item
Detecting Condition
Possible Cause
DTC Strategy
• This code detects a continuous short to high in
either the signal circuit or the sensor
Case 1
• No VSS Fault Active (No P0501)
• No Coolant Short Active Fault Present
• No MAF Active Fault Present
• Engine Air Flow 〈 15 g/s
• Vehicle Speed 〈 25kph
• Engine Coolant Temperature 〉 50℃( 122 F)
• Engine Running Time 〉 120 sec.
Enable
Condi-
tions
Case 2
• No VSS Fault Active (No P0501)
• No Coolant Short Active Fault Present
• No MAF Active Fault Present
• Engine Air Flow 〈 15 g/s
• Vehicle Speed 〈 25kph
• Ignition off time 〉 360 min.
• Engine Coolant Temperature 〉 -10℃( 14 F)
• Engine Running
Threshold value
• IATS signal 〉 4.9V
Diagnosis Time
• Continuous
(More than 4 sec. failure for every 120 sec. test)
MIL On Condition
• DTC only (NO MIL ON)
• Poor Connection
• Open or short in signal circuit
• Open in ground circuit
• Faulty IATS
• Faulty PCM
SPECIFICATION
ED73A718
Temp. (℃/℉)
Resistance (kΩ )
Temp. (℃/℉)
Resistance (kΩ )
-40(-40)
95.95 ~ 105.78
20(68)
3.42 ~ 3.61
-20(-4)
27.4 ~ 29.77
40(104)
1.43 ~ 1.5
0(32)
9.08 ~ 9.72
60(140)
0.66 ~ 0.69
10(50)
5.49 ~ 5.83
80(176)
0.33 ~ 0.34
FLA -528
FUEL SYSTEM
SCHEMATIC DIAGRAM
E43D15D8
MAFS & IATS
PCM
C13
C30-A
1
2
Main Relay
MAFS Signal
Battery Voltage (B+)
PCM C30-A (47)
3
4
PCM C30-A (44)
Ground
IATS Signal
5
PCM C30-A (53)
Sensor Ground
Chassis Ground
PCM (C30-A)
MAFS & IATS (C13)
P
5
4
3
1
2
After Main Relay
GND
47 - MAFS Signal
44 - IATS Signal
53 - GND
[CIRCUIT DIAGRAM]
[HARNESS CONNECTORS]
[CONNECTION INFORMATION]
Terminal
Connected to
Function
19
14 13 12 11
31
34
35
36
30
10
24
22
65
67
50
74
75
76
77
1
2
3
4
5
SCMF16104L
SIGNAL WAVEFORM AND DATA
E1E6FAE0
HOLD
TIME
GND
CHNL
MENU
VOLT
EGRF604E
The output signals of IATS & ECTS change smoothly without any rapid changes. Those have almost same characteristic
signal during the early period after start. It means that the temperatures of intake air and engine coolant are depended on
the temperature of atmosphere. Meanwhile, during the warming up, the output signal of ECTS is going up increasingly.
but, the output signal of IATS changes a little bit. even it may not change almost. It means that the heat of engine does
not affect on the temperature of intake air.
MONITOR DTC STATUS
EA02AEA0
1.
Check DTC Status
1)
Connect scantool to Data Link Connector(DLC).
DTC TROUBLESHOOTING PROCEDURES
FLA -529
2)
IG "ON".
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.
SCMF16159L
5)
Is parameter displayed "Present fault"?
YES
▶ Go to "Terminal and connector inspection" procedure.
NO
▶ Fault is intermittent caused by poor contact in the sensor’s and/or PCM’s connector or was repaired and PCM
memory was not cleared. Thoroughly check connectors for looseness, poor connection, ending, corrosion, con-
tamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair"
procedure.
TERMINAL AND CONNECTOR INSPECTION
E84E251C
1.
Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or
damage.
3.
Has a problem been found?
YES
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
▶ Go to "Signal Circuit Inspection" procedure.
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