Hyundai Santa Fe (2006 year). Manual — part 532
FLA -194
FUEL SYSTEM
DTC P0110 INTAKE AIR TEMPERATURE SENSOR1 CIRCUIT
COMPONENT LOCATION
E2939C87
MAFS & IATS
SCMF16185L
GENERAL DESCRIPTION
E9DAB32E
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
EACF4291
PCM monitors difference between MAX. and MIN IATS in order to detect movement in IATS therough Start Test and Drive
Test while enable condition is met. If PCM detects intake air temperature does not change, PCM determines that a fault
exists and a DTC is stored.
DTC TROUBLESHOOTING PROCEDURES
FLA -195
DTC DETECTING CONDITION
E7D8BB2A
Item
Detecting Condition
Possible cause
Case 1
• Start Test: Monitors the difference between
max and min IAT in order to detect movement
in IAT for a certain time.
DTC
Strategy
Case 2
• Drive test: Performs the max and min delta check
while driving under load for a length of time
followed by an idle for a certain time.
Enable Conditions
• Engine soaked time 〉 360min
• Engine Running State
• No disabling fault present
• IAT stored previous trip
• No IAT Tests pending
Case 1
• Max IAT - Min IAT ≤ 3℃
• Start Test Counter ≥ 120
Thresh
old
value
Case 2
• Max IAT - Min IAT ≤ 3℃
• Idle Test Counter ≥ 120
MIL On Condition
• No MIL ON (DTC only)
• Poor connection
• Open or short in harness
• IATS
• PCM
SPECIFICATION
E11F4E69
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 -196
FUEL SYSTEM
SCHEMATIC DIAGRAM
E383B48B
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
E74A022E
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
EAE59C54
1.
Check DTC Status
1)
Connect scantool to Data Link Connector(DLC).
DTC TROUBLESHOOTING PROCEDURES
FLA -197
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
EDAB98BB
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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