Hyundai Santa Fe (2006 year). Manual — part 617
FLA -534
FUEL SYSTEM
DTC P1112 INTAKE AIR TEMPERATURE SENSOR CIRCUIT SHORT -
INTERMITTENT LOW INPUT
COMPONENT LOCATION
EE64C5F4
Refer to DTC P1111.
GENERAL DESCRIPTION
E1876C90
Refer to DTC P1111.
DTC DESCRIPTION
E8A6F59D
Checking output signals of IATS every 20 sec. under detecting condition, if an ouput signal is below 0.1V for more than
10 sec., PCM sets P1112.
DTC DETECTING CONDITION
EB10DA7C
Item
Detecting Condition
Possible Cause
DTC Strategy
• This code detects a continuous short to ground
in either the signal circuit or the sensor
Case 1
• Engine Run State
• No VSS Fault Active
• Vehicle Speed 〉 50kph(31mph)
• IAT Short Low Enable Criteria Met
Enable
Condi-
tions
Case 2
• Engine Running Time 〉 120sec.
• IG "OFF" time 〉 360min.
• IAT Short Low Enable Criteria Met
Threshold value
• IATS signal 〈 0.1V
Diagnosis Time
• Continuous
(More than 10 sec. failure for every 20 sec. test)
MIL On Condition
• DTC only
• Poor Connection
• Short to ground in signal
circuit.
• Faulty IATS
• Faulty PCM
SPECIFICATION
E8D6E9DC
Refer to DTC P1111.
SCHEMATIC DIAGRAM
EF759E70
Refer to DTC P1111.
SIGNAL WAVEFORM AND DATA
E01DD8F1
Refer to DTC P1111.
MONITOR DTC STATUS
EF79ACC8
Refer to DTC P1111.
DTC TROUBLESHOOTING PROCEDURES
FLA -535
TERMINAL AND CONNECTOR INSPECTION
E58ED658
Refer to DTC P1111.
SIGNAL CIRCUIT INSPECTION
EF4CCDA1
1.
Check voltage
1)
IG "OFF" and disconnect IATS connector.
2)
IG "ON" and ENG "OFF"
3)
Measure voltage between terminal 4 of IATS harness connector and chassis ground.
Specification : Approx. 5V
4)
Is the measured voltage within specification ?
YES
▶ Go to "Component Inspection" procedure.
NO
▶ Go to " Check short to ground in harness" procedure.
2.
Check short to ground in harness
1)
IG "OFF" and disconnect IATS connector and PCM connector.
2)
Measure resistance between terminal 4 of IATS harness connector and chassis ground.
3)
Measure resistance between terminals 4 and 5 of IATS harness connector.
4)
Measure resistance between terminals 4 and 3 of IATS harness connector.
Specification : Infinite
5)
Is the measured resistance within specification?
YES
▶ Go to "Component inspection" procedure.
NO
▶ Repair short to ground in harness and go to "Verification of Vehicle Repair" procedure.
COMPONENT INSPECTION
E57797EC
1.
Check IATS
1)
IG "OFF" and disconnect IATS connector.
2)
Measure resistance between teminals 4 and 5 of IATS connector.(Component side)
FLA -536
FUEL SYSTEM
SPECIFICATON :
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
1
2
3
C13
1. MAFS Signal
2. MAFS Power
3. MAFS Ground
4. IATS Signal
5. IATS Ground
5
4
Ω
SCMF16204L
3)
Is the measured resistance within specification ?
YES
▶ Go to "Check PCM" as follows.
NO
▶ Substitute with a known - good IATS and check for proper operation. If the problem is corrected, replace IATS
and go to "Verification of Vehicle Repair" procedure.
2.
Check PCM
1)
IG "OFF" and connect scantool.
2)
Disconnect IATS connector and connect probe to terminal 4 of IATS harness connector.
3)
IG "ON" and ENG "OFF" and simulation Function on scantool.
4)
Simulate voltage at terminal 4 of IATS harness connector.
1
2
3
4
5
C13
1. MAFS Signal
2. MAFS Power
3. MAFS Ground
4. IATS Signal
5. IATS Ground
SCMF16205L
DTC TROUBLESHOOTING PROCEDURES
FLA -537
5)
Does the signal value of IAT sensor change according to simulation voltage ?
YES
▶ Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deteriora-
tion, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
NO
▶ 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.
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
EAB20578
Refer to DTC P1111.
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