DTC P0096, P0097, or P0098 (LUJ)
Diagnostic Instructions
DTC Descriptors
| DTC P0096 00: Intake Air Temperature (IAT)
Sensor 2 Performance |
| DTC P0097 00: Intake Air Temperature (IAT)
Sensor 2 Circuit Low Voltage |
| DTC P0098 00: Intake Air Temperature (IAT)
Sensor 2 Circuit High Voltage |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Signal Circuit
|
P0097 00
|
P0098 00
|
P0098 00
|
P0096 00
|
Low Reference
|
-
|
P0098 00
|
P0098 00
|
P0096 00
|
|
| |
Typical Scan Tool Data
IAT Sensor 2
Circuit
|
Short to Ground
|
Open
|
Short to Voltage
|
Operating Conditions: Engine running
Parameter Normal Range: Varies with
ambient temperature
|
Signal Circuit
|
143°C (289°F)
|
-40°C (-40°F)
|
-40°C (-40°F)
|
Low Reference
|
-
|
-40°C (-40°F)
|
-40°C (-40°F)
|
|
| |
Circuit/System Description
The intake air temperature (IAT) sensor 2 is integrated with the
intake manifold pressure sensor. The IAT sensor 2 is a variable
resistor that measures the temperature of the air after the charge
air cooler in the intake manifold. The engine control module (ECM)
supplies 5 V to the IAT sensor 2 signal circuit and a ground for
the low reference circuit.
Conditions for Running the DTC
P0096 00 or P0097 00
| • |
The ignition is ON or the
engine is running. |
| • |
DTC P0097 00 runs continuously
within the enabling conditions. |
P0098 00
| • |
The ignition voltage is
between 11-18 V. |
| • |
DTC P0098 00 runs continuously
within the enabling conditions. |
Conditions for Setting the DTC
P0097 00
The ECM detects that the IAT sensor 2 is warmer than 140°C
(284°F) for greater than 15 s at idle.
P0098 00
The ECM detects that the IAT sensor 2 is colder than -39°C
(-38°F) for greater than 15 s at idle.
Action Taken When the DTC Sets
DTC P0096 00, P0097 00, P0098 00 are Type D DTCs.
Conditions for Clearing the DTC
DTC P0096 00, P0097 00, P0098 00 are Type D DTCs.
Diagnostic Aids
Depending on the output from the intake manifold pressure, an
IAT sensor 2 signal circuit that is shorted to the intake manifold
pressure sensor signal circuit may cause the IAT Sensor 2 parameter
response to be erratic or become stuck at a given value.
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
| 1. |
If the ignition has been OFF
for 8 h or greater, the B75B Mass Air Flow/Intake Air Temperature
Sensor (IAT 1), the B65 Intake Manifold Pressure and Air
Temperature Sensor (IAT 2), and the B34 Engine Coolant Temperature
Sensor should be within 9°C (16°F) of each other. Ignition
ON, observe the scan tool IAT Sensor, IAT Sensor 2 and the ECT
Sensor parameters. Compare those sensor parameters to each other to
determine if the condition is current. |
| 2. |
Engine running, observe the
scan tool IAT Sensor 2 parameter. The reading should be between -39
to +130°C (-38 to +266°F) depending on the current ambient
temperature and the vehicle operating conditions. |
| 3. |
Operate the vehicle within the
conditions for running the DTC to verify the DTC does not reset.
You may also operate the vehicle within the conditions that you
observed from the freeze frame/failure records data. |
Circuit/System Testing
| 1. |
Verify that debris is not
blocking the airflow through the charge air cooler. |
| 2. |
Ignition OFF for 90 s,
disconnect the harness connector at the B65 Intake Manifold
Pressure and Air Temperature Sensor. |
| 3. |
Test for less than 5 Ω
between the low reference circuit terminal 1 and ground.
|
| ⇒ |
If greater than the specified range, test the low
reference circuit for an open/high resistance. If the circuit tests
normal, replace the K20 Engine Control Module. |
| 4. |
Ignition ON, verify the scan
tool IAT Sensor 2 parameter is colder than -39°C
(-38°F). |
| ⇒ |
If warmer than the specified range, test the
signal circuit terminal 2 for a short to ground. If the circuit
tests normal, replace the K20 Engine Control Module. |
| 5. |
Install a 3 A fused jumper
wire between the signal circuit terminal 2 and ground. Verify the
scan tool IAT Sensor 2 parameter is warmer than 130°C
(266°F). |
| ⇒ |
If less than the specified range, test the signal
circuit for a short to voltage or an open/high resistance. If the
circuit tests normal replace the K20 Engine Control Module. |
| 6. |
If the circuits test normal,
test or replace the B65 Intake Manifold Pressure and Air
Temperature Sensor. |
Component Testing
Static Test
Measure and record the resistance of the B65 Intake Manifold
Pressure and Air Temperature Sensor (IAT 2) at various ambient
temperatures, then compare those measurements to the
Temperature Versus Resistance .
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
