Circuit Description
The throttle position (TP) sensors 1 and 2 are located within the throttle body assembly. Each sensor has the following components:
| • | A 5-volt reference circuit |
| • | A low reference circuit |
| • | A signal circuit |
This provides the powertrain control module (PCM) with a signal voltage proportional to throttle plate movement. TP sensor 1 signal voltage at closed throttle is near the 5-volt reference and decreases as the throttle plate is opened. TP sensor 2 signal voltage at closed throttle is near the low reference and increases as the throttle plate is opened. When TP sensor 2 signal voltage is not within the predicted range, this code sets.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0220 Throttle Position (TP) Sensor 2 Circuit
Conditions for Running the DTC
| • | The ignition switch in the Crank or Run position. |
| • | DTC P0641 is not set. |
| • | The ignition voltage is more than 5.23 volts. |
| • | DTC P0220 runs continuously when the above conditions are met. |
Conditions for Setting the DTC
The TP sensor 2 voltage is less than 0.31 volt or more than 4.7 volts for more than 0.5 second.
Action Taken When the DTC Sets
| • | The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails. |
| • | The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame and/or the Failure Records. |
| • | The control module commands the TAC system to operate in the Reduced Engine Power mode. |
| • | A message center or an indicator displays Reduced Engine Power. |
| • | Under certain conditions the control module commands the engine OFF. |
Conditions for Clearing the MIL/DTC
| • | The PCM will turn OFF the malfunction indicator lamp (MIL) during the third consecutive trip in which the diagnostic runs and passes. |
| • | The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction. |
| • | The DTC can be cleared by using a scan tool. |
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module Connector End Views or Engine Controls Connector End Views | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |
2 |
Does the scan tool indicate voltage less than the first value or greater than the second value? | 0.31 V 4.7 V | Go to Step 4 | Go to Step 3 |
3 |
Is DTC P0220 the only DTC to fail this ignition? | -- | Go to Step 22 | Go to Testing for Intermittent Conditions and Poor Connections |
4 | Are there any other DTCs set? | -- | Go to Testing for Intermittent Conditions and Poor Connections | |
5 |
Does the scan tool indicate voltage at the specified value? | 5 V | Go to Step 6 | Go to Step 13 |
6 | With a test lamp connected to ground, probe the throttle position (TP) sensor signal circuit. Does the test lamp illuminate? | -- | Go to Step 13 | Go to Step 7 |
7 | With a test lamp still connected to the TP sensor signal circuit, observe the TP Sensor 2 parameter. Does the scan tool indicate voltage at the specified value? | 0 V | Go to Step 8 | Go to Step 12 |
8 | Measure the voltage of the TP sensor 2 5-volt reference circuit with a DMM. Does the DMM indicate voltage at the specified value? | 5 V | Go to Step 9 | Go to Step 11 |
9 | Measure the resistance of the low reference circuit of the TP sensor 2 with a DMM. Refer to Circuit Testing. Is the resistance less than the specified value? | 5 ohms | Go to Step 10 | Go to Step 15 |
10 | Test the TP sensor low reference circuit for a short to ground. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 19 |
11 | Does the DMM indicate voltage less than the specified value on the TP sensor 2 5-volt reference circuit? | 5 V | Go to Step 16 | Go to Step 18 |
12 | Test the TP sensor 2 signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 14 |
13 | Test the TP sensor 2 signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 21 |
14 | Test the TP sensor 2 signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 21 |
15 | Test the TP sensor 2 low reference circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 21 |
16 | Test the TP sensor 2 5-volt reference circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 17 |
17 | Test the TP sensor 2 5-volt reference circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 21 |
18 | Test the TP sensor 2 5-volt reference circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | -- | Go to Step 23 | -- |
19 | Inspect for poor connections at the throttle body harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 20 |
20 | Replace the throttle body assembly. Refer to Throttle Body Assembly Replacement . Did you complete the replacement? | -- | Go to Step 23 | -- |
21 | Inspect for poor connections at the powertrain control module (PCM) harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | -- | Go to Step 23 | Go to Step 22 |
22 | Replace the PCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 23 | -- |
23 |
Did the DTC fail this ignition? | -- | Go to Step 2 | Go to Step 24 |
24 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | -- | System OK | |
