DTC P0097 or P0098 (LPL or LPV)
Diagnostic Instructions
DTC Descriptors
| DTC P0097: Intake Air Temperature (IAT) Sensor
2 Circuit Low Voltage |
| DTC P0098: 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
|
P0097
|
P0098
|
P0098
|
-
|
Low Reference
|
-
|
P0098
|
P0098
|
-
|
|
| |
Circuit/System Description
The intake air temperature (IAT) sensor 2 is an integral part of
the turbocharger pressure sensor. The IAT sensor is a variable
resistor that measures the temperature of the intake air. The
engine control module (ECM) supplies 5 V 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
|
IAT Signal Voltage
|
Cold
|
High
|
High
|
Warm
|
Low
|
Low
|
|
| |
Conditions for Running the DTC
| • |
The ignition is ON, or the
engine is running. |
| • |
The DTCs run continuously once
the above conditions are met. |
Conditions for Setting the DTC
P0097
The ECM detects that the IAT sensor 2 is less than 160 mV for
greater than 0.5 s.
P0098
The ECM detects that the IAT sensor 2 parameter is greater than 4.9
V for greater than 0.5 s.
Action Taken When the DTC Sets
DTCs P0097 and P0098 are Type C DTCs.
Conditions for Clearing the DTC
DTCs P0097 and P0098 are Type C DTCs.
Diagnostic Aids
| • |
If the engine has sat
overnight, the IAT sensor and the engine coolant temperature (ECT)
sensor values should display within 3°C (5°F). |
| • |
High resistance on either the
IAT sensor signal circuit or the IAT sensor low reference circuit
may set a DTC. |
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. |
Ignition On, observe the DTC
information with a scan tool. DTCs P0097 or P0098 should not
set. |
| 2. |
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. |
Ignition OFF, disconnect the
harness connector at the B111 Turbocharger Boost Sensor.
|
| 2. |
Ignition OFF, test for less
than 5 Ω between the low reference circuit terminal 2 and
earth. |
| ⇒ |
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. |
| 3. |
Ignition ON, verify the scan
tool IAT Sensor 2 parameter is greater than 4.5 V. |
| ⇒ |
If less than the specified range, test the signal
circuit for a short to ground. If the circuit tests normal, replace
the K20 Engine Control Module. |
| 4. |
Install a 10 A fused jumper
wire between the signal circuit terminal 4 and the low reference
circuit terminal 2. Verify the scan tool IAT Sensor 2 parameter is
less than 0.3 V. |
| ⇒ |
If greater 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. |
| 5. |
If all circuits test normal,
test or replace the B111 Turbocharger Boost Sensor. |
Component Testing
Static Test
Measure and record the resistance between the IAT signal circuit
terminal 4 and the low reference circuit terminal 1 at various
ambient temperatures. Compare those measurements to the
Temperature Versus Resistance table and verify that the
resistance is within 5% of the specification.
If not within the specified range, replace the B111 Turbocharger
Boost Sensor.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
