P2135

DTC P2135

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. The TP signal voltages are opposite from one another. TP sensor 1 is pulled up to reference voltage as the throttle blade is opened. The TP sensor 2 is pulled down to low reference 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 APP sensor 2 share a 5-volt reference circuit that is also bussed within the TAC module. The APP sensor 3 has a dedicated 5-volt reference circuit.

When this DTC sets, the Reduced Engine Power indicator will be displayed.

This DTC incorporates 3 different diagnostic tests:
- TP sensor 1 and TP sensor 2 correlation
- Throttle blade minimum position correlation between the TP sensor 1 and TP sensor 2
- TP sensor 1 signal shorted to a 5-volt reference, ground, or the TP sensor 2 signal circuit

If the PCM detects that one or more of the TP sensor 1 tests are out of range, DTC P2135 sets.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P2135 Throttle Position (TP) Sensor 1-2 Correlation

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 greater than 5.23 volts.
- The TP sensor 1 to TP sensor 2 correlation test runs continuously.
- The throttle blade minimum position correlation test runs once after the ignition is turned ON.
- The TP sensor 1 signal circuit short tests runs continuously.

CONDITIONS FOR SETTING THE DTC
- The TP sensor 1 to TP sensor 2 correlation error is more than 6 percent for more than _____ seconds.OR
- The PCM detects a short on the TP sensor 1 signal circuit for more than _____seconds.

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. When water intrusion occurs, multiple DTCs could be set with no DTC circuit or component conditions found during diagnostic testing.
- When the TAC module detects a condition within the TAC system, more than 1 TAC system related DTC may set. This is due to the many redundant tests that run continuously on this system. Locating and repairing 1 individual condition may correct more than 1 DTC. Disconnecting components during testing may set additional DTCs. Keep this in mind when reviewing the Capture Info.
- If this DTC is determined to be intermittent, refer to Intermittent Conditions. Intermittent Conditions

TEST DESCRIPTION

Steps 1-13:

Steps 14-21:

The numbers below refer to the step numbers on the diagnostic table.
21. When the TAC module detects a condition within the TAC system, more than 1 TAC system related DTC may set. This is due to the many redundant tests that run continuously on this system. Locating and repairing 1 individual condition may correct more than 1 DTC. Disconnecting components during testing may set additional DTCs. Keep this in mind when reviewing the Capture Info.