P1516

DTC P1516 Command - Actual TPS Correlation Error




Circuit Description
- The throttle position (TP) sensor circuit provides a voltage signal relative to throttle position (blade angle). The throttle blade angle will vary about 8% at closed throttle to about 92% at wide open throttle (WOT).
- The DC motor circuit provides a voltage signal relative to command throttle position (blade angle).
- This DTC detects the difference between actual throttle position and command throttle position in steady state.

Conditions for setting the DTC
- The ignition is "ON".
- Throttle Actuation mode is normal.
- Command Throttle position - Actual Throttle position is less than 8% when desired TPS is steady within 0.5% for 30 second within test samples (30 second)

Action Taken When the DTC Sets
- The PCM will illuminate the malfunction indicator lamp (MIL) the first time the fault is detected.
- The PCM calculates an air flow value based on Idle air Control valve position, throttle position, RPM and barometric pressure.
- The PCM will store condition which were present when the DTC was set as Freeze Frame and in the Failure Records data.

Conditions for Clearing the MIL/DTC
- The PCM will turn the MIL "OFF" on the third consecutive trip cycle during which the diagnostic has been run and the fault condition is no longer present.
- A history DTC P1516 will clear after 40 consecutive trip cycle during which the warm up cycles have occurred without a fault.
- DTC P1516 can be cleared using the Tech 2 "Clear Info" function or by disconnecting the PCM battery feed.

Diagnostic Aids
An intermittent may be caused by the following:
- Poor connections.
- Mis routed harness.
- Rubbed through wire insulation.
- Broken wire inside the insulation. Check for the following conditions:
- Poor connection at PCM - Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.
- Damaged harness - Inspect the wiring harness for damage. If the harness appears to be OK, observe the TP sensor 1, TP sensor 2 display on the Tech 2 while moving connectors and wiring harnesses related to the sensor.

A change in the display will indicate the location of the fault. If DTC P1516 cannot be duplicated, the information included in the Failure Records data can be useful in determined vehicle mileage since the DTC was last set.

If it is determined that the DTC occurs intermittently, performing the DTC P1516 Diagnostic Chart may isolate the cause of the fault.

Steps 1 - 3:

Steps 4 - 8:

Steps 9 - 12:

Step 13:

Test Description