P0220

DTC P0220

CIRCUIT DESCRIPTION
The throttle position (TP) sensor incorporates 2 ratiometric TP sensors into one housing. TP sensor 1 and TP sensor 2 each have a 5-Volt reference circuit supplied by the throttle actuator control (TAC) module. The TAC module supplies each TP sensor with a low reference circuit. Each TP sensor supplies the TAC module with a signal voltage that is proportional to the throttle blade position. Both TP signal voltages increase as the throttle blade is opened. The TP sensor 1 and the accelerator pedal position (APP) sensor 1 share a 5-Volt reference circuit that is bussed within the TAC module. The TP sensor 2 and the APP sensor 2 share a 5-Volt reference circuit that is also bussed within the TAC module. When this DTC sets, the Reduced Engine Power indicator will be displayed.

This DTC incorporates the following diagnostic tests:
- The TP sensor 2 signal circuit voltage out of range
- The throttle blade minimum position for the TP sensor 2 out of range
- The 5-Volt reference of the TP sensor 2 tests out of range.

If the PCM detects one or more of the TP sensor 2 tests are out of range, DTC P0220 sets.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0220 Throttle Position (TP) Sensor 2 Circuit

CONDITIONS FOR RUNNING THE DTC
- DTCs P2108 or U0107 are not set.
- The ignition switch is in the Crank or Run position.
- The ignition voltage is more than 5.23 volts.
- The TP sensor 2 signal voltage test runs continuously once the above conditions are met.
- The throttle blade minimum position for the TP sensor 2 test runs once when the ignition is turned ON and the above conditions are met.
- The 5-Volt reference of the TP sensor 2 voltage test runs continuously once the above conditions are met.

CONDITIONS FOR SETTING THE DTC
- The TP sensor 2 signal voltage is less than 0.28 volts, or more than 4.6 volts, for more than 0.1 second. OR
- The TP sensor 2 minimum throttle blade position is less than 0.28 volts, or more than 0.81 volts, for less than 1 second. OR
- The 5-Volt reference circuit of the TP sensor 2 is less than 0.5 volts for more than 0.01 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 control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDS
- Inspect the TAC module connectors for signs of water intrusion. If water intrusion occurs, multiple DTCs may set without any circuit or component conditions found during diagnostic testing.
- When the TAC module detects a condition within the TAC system, more than one TAC system related DTC may set. This is due to the many redundant tests run continuously on this system. Locating and repairing one individual condition may correct more than one DTC. Disconnecting components during testing may set additional DTCs. Remember this if you review the stored information in Capture Info.
- If this DTC is determined to be intermittent, refer to Testing for Intermittent Conditions and Poor Connections. Component Tests and General Diagnostics

TEST DESCRIPTION

Step 1 - Step 8:

Step 9 - Step 20:

Step 21 - Step 31:

The number below refers to the step number on the diagnostic table.
31. When the TAC module detects a condition within the TAC system, more than one TAC system related DTC may set. This is due to the many redundant tests run continuously on this system. Locating and repairing one individual condition may correct more than one DTC. Disconnecting components during testing may set additional DTCs. Keep this in mind when reviewing the stored information, Capture Info.