Chevrolet Trax: DTC P00EA-P00EC
Diagnostic Instructions
- Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
- Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
- Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptors
DTC P00EA
Intake Air Temperature (IAT) Sensor 3 Circuit Low Voltage
DTC P00EB
Intake Air Temperature (IAT) Sensor 3 Circuit High Voltage
DTC P00EC
Intake Air Temperature (IAT) Sensor 3 Circuit Erratic
Diagnostic Fault Information
IAT Sensor 3
Typical Scan Tool Data
IAT Sensor 3
Circuit/System Description
The intake air temperature (IAT) sensor 3 is a variable resistor that changes
an engine control module (ECM)
supplied 5 V signal. The signal varies with inlet air temperature and is
displayed by the scan tool as ºC (ºF).
The IAT sensor 3 is integrated with the B111B Turbocharger Boost/Intake Air
Temperature Sensor in the
sensor bore, which is located before the throttle body. The ECM supplies a
ground for the IAT sensor 3 low
reference circuit.
The IAT sensor 1 and IAT sensor 2 are part of the B75C Multifunction Intake Air
Sensor. The IAT sensor 1
produces an analog signal on pin-8 of the sensor. The IAT sensor 2 produces a
frequency modulated signal on
pin-1 of the sensor.
Conditions for Running the DTCs
P00EA, P00EB, and P00EC
- The ignition is ON, or the engine is running.
- The DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
NOTE: The scan tool display range is between -40 and +150ºC (-40
and +302ºF).
P00EA
The ECM detects that the IAT sensor 3 signal is warmer than 149ºC (300ºF) for
at least 5 s.
P00EB
The ECM detects that the IAT sensor 3 signal is colder than -60ºC (-76ºF) for
at least 5 s.
P00EC
The ECM detects that the IAT sensor 3 signal is intermittent or has abruptly
changed for at least 5s.
Action Taken When the DTCs Set
- DTCs P00EA, P00EB, and P00EC are Type B DTCs.
- The ECM commands the cooling fans ON.
Conditions for Clearing the DTCs
DTCs P00EA, P00EB, and P00EC are Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics (Encore) , Engine Controls Schematics (Trax)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - TRAX
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Powertrain Component Views
Powertrain Component Views
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (LUV) ,
Powertrain Diagnostic Trouble
Code (DTC) Type Definitions (2H0)
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Ignition ON.
- Verify that DTC DTC P0641, P0651, P0697, or P06A3 is not set.
If any of the DTCs are set
Refer to DTC P0641, P0651, P0697, or P06A3 (ECM) for further diagnosis.
If none of the DTCs are set
NOTE: To minimize the effects of residual engine heat and sensor
internal heating
elements, perform Steps 3 and 4 of this verification procedure only if the
ignition has been OFF for 8 hours or more.
- Ignition ON.
- Verify the following scan tool parameters are within 25ºC (45ºF) of each
other.
- Start-Up IAT Sensor 1
- IAT Sensor 2
- IAT Sensor 3
If not within 25ºC (45ºF)
Refer to Circuit/System Testing.
If within 25ºC (45ºF)
- Engine idling, verify the IAT Sensor 3 scan tool parameter is between:
-38 and +128ºC (-36 and +262ºF).
If not between: -38 and +128ºC (-36 and +262ºF)
Refer to Circuit System Testing.
If between: -38 and +128ºC (-36 and +262ºF)
- Operate the vehicle within the Conditions for Running the DTC. You may
also operate the vehicle within
the conditions that you observed from the Freeze Frame/Failure Records data.
- Verify the DTC does not set.
If the DTC sets
Refer to Circuit/System Testing.
If the DTC does not set
- All OK
Circuit/System Testing
NOTE: You must perform the Circuit/System Verification
before proceeding with
Circuit/System Testing.
- Ignition OFF, and all vehicle systems OFF, it may take up to 2 min. for
all vehicle systems to power
down. Disconnect the harness connector at the B111B Turbocharger Boost/Intake
Air Temperature
sensor.
- Test for less than 2 ohms between the low reference circuit terminal 1
and ground.
If 2 ohms or greater
- Ignition OFF, disconnect the harness connector at the K20 Engine Control
Module.
- Test for less than 2 ohms in the low reference circuit end to end.
- If 2 ohms or greater, repair the open or high resistance in the circuit.
- If less than 2 ohms replace the K20 Engine Control Module.
If less than 2 ohms
- Ignition ON, test for 4.8-5.2 V between the signal circuit terminal 2
and ground.
If less than 4.8 V
- Ignition OFF, disconnect the harness connector at the K20 Engine Control
Module.
- Test for infinite resistance between the signal circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance
- Test for less than 2 ohms in the signal circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, replace the K20 Engine Control Module.
If greater than 5.2 V
NOTE: If the signal circuit is shorted to a voltage the engine
control module
or the sensor may be damaged.
- Ignition OFF, disconnect the harness connector at the K20 Engine Control
Module.
- Ignition ON, test for less than 1 V between the signal circuit and
ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the K20 Engine Control Module.
If between 4.8-5.2 V
- Ignition ON, verify the scan tool IAT Sensor 3 parameter is colder than
-39ºC (-38ºF).
If warmer than -39ºC (-38ºF).
- Ignition OFF, disconnect the harness connector at the K20 Engine Control
Module.
- Test for infinite resistance between the signal circuit terminal 2 and
ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance
- Test for less than 2 ohms in the signal circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, replace the K20 Engine Control Module.
If colder than -39ºC (-38ºF).
- Ignition OFF, install a 3 A fused jumper wire between the signal circuit
terminal 2 and the low reference
circuit terminal 1.
- Verify the scan tool IAT Sensor 3 parameter is warmer than 128ºC
(262ºF).
If colder than 128ºC (262ºF).
- Ignition OFF, remove the jumper wire, disconnect the harness connector
at the K20 ECM, ignition
ON.
- Test for less than 1 V between the signal circuit and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V
- Ignition OFF.
- Test for less than 2 ohms in the signal circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, replace the K20 ECM.
If warmer than 128ºC (262ºF).
- Test or replace the B111B Turbocharger Boost/Intake Air Temperature
sensor.
Component Testing
Turbocharger Boost/Intake Air Temperature sensor
- Ignition OFF, disconnect the harness connector at the B111B Turbocharger
Boost/Intake Air Temperature
sensor.
NOTE: A thermometer can be used to test the sensor off the vehicle.
- Test the IAT sensor 3 by varying the sensor temperature while monitoring
the sensor resistance. Compare
the readings with the Temperature Versus Resistance - Intake Air Temperature
Sensor (Bosch
Sensor) , Temperature Versus Resistance - Intake Air Temperature Sensor (Delco
Sensor) table for
the appropriate sensor. The resistance values should be in range of the
table values.
If not within the specified range.
Replace the B111B Turbocharger Boost/Intake Air Temperature sensor.
If within the specified range.
- All OK
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
- Intake Air Pressure and Temperature Sensor Replacement for turbocharger
boost/intake air
temperature replacement
- Control Module References for Engine Control Module replacement,
programming, and setup.
READ NEXT:
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
SEE MORE:
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptors
D
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptors
D