DTC P2101
| DTC P2101 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptors |
DTC P2101 03
Intake Air Flow Valve Control Circuit Low Voltage
DTC P2101 39
Intake Air Flow Valve Control Circuit Internal Malfunction
DTC P2101 51
Intake Air Flow Valve Control Circuit Malfunction
DTC P2101 52
Intake Air Flow Valve Control Circuit Malfunction
DTC P2101 54
Intake Air Flow Valve Control Circuit High Temperature
DTC P2101 59
Intake Air Flow Valve Control Circuit Malfunction
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
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Control 1
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P2102 02, P2101 03
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P2100 04, P2101 54
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P2103 01
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P2101 59, P2101 39, P2101 51, P2101 52
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Control 2
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P2102 02, P2101 03
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P2100 04, P2101 54
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P2103 01
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P2101 59, P2101 39, P2101 51, P2101 52
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| Circuit/System Description |
A throttle plate actuator is used to achieve high exhaust gas recirculation rates. It increases the pressure difference between exhaust and intake so that the appropriate exhaust quantity can be mixed with the intake air. The ECM transfers the desired angle to the throttle plate actuator as a PWM signal. The throttle plate actuator activates the DC motor so that the throttle shall be controlled in proportion to the PWW signal from the ECM. The position of the throttle is monitored by an internal position sensor.
| Conditions for Running the DTC |
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The ignition is ON or the engine is running.
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The throttle actuator motor is commanded ON or OFF.
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The ignition voltage is less than 16 V.
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The DTCs run continuously when the above conditions are met.
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| Conditions for Setting the DTC |
The ECM detects an open, short to ground, or a short to voltage on the throttle actuator control circuit for greater than 1 s.
| Action Taken When the DTC Sets |
DTC P2101 is a Type A DTC.
| Conditions for Clearing the DTC |
DTC P2101 is a Type A DTC.
| Reference Information |
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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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, command the Intake Air Flow Valve Position ON and OFF with a scan tool. The throttle plate should respond to the scan tool commands.
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| 2. |
Read the DTC information from the scan tool. DTC P2100, P2101, P2102 or P2103 should not be shown.
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| 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.
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| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the harness connector at the Q38 Throttle Body.
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| 2. |
Ignition ON, connect a test lamp between control circuit terminal 2 and ground. The test lamp should turn ON.
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| 3. |
If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the K20 Engine Control Module.
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| 4. |
Ignition ON, connect a test lamp between control circuit terminal 6 and ground. The test lamp should turn ON.
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| 5. |
If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the K20 Engine Control Module.
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| 6. |
Ignition OFF, disconnect the harness connector X1 at the K20 Engine Control Module.
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| 7. |
Ignition ON, connect a test lamp between control circuit terminal 6 and ground. The test lamp should not illuminate.
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| 8. |
If the test lamp illuminate, test the control circuit for a short to voltage. If the circuits test normal, replace the K20 Engine Control Module.
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Ignition ON, connect a test lamp between the control circuit terminal 2 and ground. The test lamp should not illuminate.
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| 10. |
If the test lamp illuminate, test the control circuit for a short to voltage. If the circuits test normal, replace the K20 Engine Control Module.
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| 11. |
If all circuits test normal, replace the Q38 Throttle Body.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Throttle Body Assembly Replacement
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Control Module References
for ECM replacement, setup, and programming
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