Dtc P0111, P0112 Or P0113 - Suzuki XL7 2007 Service Manual

DTC P0111, P0112 or P0113

Diagnostic Instructions
• Perform the "Diagnostic System Check - Vehicle Diagnostic Information: " prior to using this diagnostic procedure.
• Review "Strategy Based Diagnosis: " for an overview of the diagnostic approach.
• "Diagnostic Procedure Instructions - Vehicle Diagnostic Information: " provides an overview of each diagnostic
category.
DTC Descriptors
DTC P0111: Intake Air Temperature (IAT) Sensor Circuit Performance
DTC P0112: Intake Air Temperature (IAT) Sensor Circuit Low Voltage
DTC P0113: Intake Air Temperature (IAT) Sensor Circuit High Voltage
Diagnostic Fault Information
Circuit
IAT Sensor Signal
Low Reference
Internal ECM or sensor damage may occur if the circuit is shorted to B+
1
Typical Scan Tool Data
IAT Sensor
Circuit
Operating Conditions: Engine operating in Closed Loop.
Parameter Normal Range:−39° to +134°C (−38° to +274°F) Varies with ambient temperature.
IAT Sensor Signal
Low Reference
Internal ECM or sensor damage may occur if the circuit is shorted to B+
1
Circuit Description
The intake air temperature (IAT) sensor is an integral
part of the mass air flow (MAF) sensor. The IAT sensor is
a variable resistor that measures the temperature of the
intake air. The engine control module (ECM) supplies 5
volts to the IAT signal circuit and supplies a ground to the
low reference circuit.
The following table illustrates the difference between
temperature, resistance, and voltage:
IAT IAT Resistance
Cold
Warm
Conditions for Running the DTC
P0111 Idle Test
• Before the ECM can report DTC P0111 failed, DTC
P0101 must run and pass.
• DTCs P0112, P0113, P0116, P0117, P0118, P0119,
P0125, and P0128 are not set.
• The engine coolant temperature (ECT) at engine start
is less than 85°C (185°F).
• The ECT is more than 66°C (151°F).
• The vehicle speed is less than 10 km/h (6 mph).
• DTC P0111 runs continuously once the above
conditions are met for more than 2 seconds.
Short to
Ground
Short to Ground
IAT Signal
Voltage
High High
Low Low
Engine General Information and Diagnosis:
Open/High
Resistance
P0112 P0111, P0113
— P0111, P0113
−40°C (−40°F)
135°C (275°F)
−40°C (−40°F)
—
P0111 Cruise Test
• Before the ECM can report DTC P0111 failed, DTC
P0101 must run and pass.
• DTCs P0112, P0113, P0116, P0117, P0118, P0119,
P0125, and P0128 are not set.
• The ECT at engine start is less than 85°C (185°F).
• The vehicle speed is more than 40 km/h (25 mph).
• The MAF is between 11-42 g/s.
• Decel fuel cut-off (DFCO) is not active.
• DTC P0111 runs continuously once the above
conditions are met for more than 2 seconds.
P0112 and P0113
• The engine run time is more than 3 minutes.
• The engine is idling for more than 10 seconds.
• The DTCs runs continuously once the above
conditions are met.
Short to Voltage
Performance
P0113
1
P0113
1
Open Short to Voltage
−40°C (−40°F)
−40°C (−40°F)
1A-70
Signal
P0111
P0111
1
1