2002 Jeep Grand Cherokee Logo
Posted on Dec 30, 2008
Answered by a Fixya Expert

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EVIC - PERFORM SERVICE MESSAGE

My malfunction Indicator Light came on. A scanner was used to determine the problem which was the Throttle Postion Sensor. I had it replaced. Now when I start my vehicle, on the EVIC, Perform Service appears and I hear a series of beeps. How do I clear this message and stop the beeps?

  • lisad583 Jan 01, 2009

    Thank you so much for the prompt response. I followed your instructions and now my problem is corrected.

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  • Posted on Dec 30, 2008
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To reset the perform service message , is as follows , turn ignition switch to the ON position , depress and release MENU push button until SERVICE INTV . = is displayed , press and release STEP button to step through available options. the last selected distance option displayed becomes the service interval at which the PERFORM SERVICE message will be displayed . if a new distance interval is selected , RESET SERVICE DISTANCE ? with a yes or no option. when yes is selected the accumulated distance since the last previous PERFORM SERVICE message will be set to zero because the service interval has been changed . when NO is selected , the distance until the next PERFORM SERVICE message is reduced by the accumulated distance since the last previous message . EVIC exits programming mode and returns to its normal operation mode when the C/T button is depressed or when the end of the programmable feature menu list is reached , whichever comes first .

Thanks for asking .

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  1. Throttle control problems: A sticky throttle control or a malfunctioning throttle position sensor could be causing the high revs.
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2007 ford explorer xlt v6 first check engine light came on followed by the wrench warning light when shifting into drive now I find cruise control don't work.

Light's on , have a vehicle scan done . Check code's . wrench light on ? .
Wrench Warning Indicator (Base Instrument Cluster)
The instrument cluster receives the powertrain status from the PCM over the HS-CAN. When a powertrain system concern is detected, the PCM sends the instrument cluster a command signal to illuminate the wrench warning indicator. If the 4WD control module detects a failure with the 4WD drive system, the 4WD control module sends a message to the instrument cluster over the CAN to illuminate the wrench warning indicator. On 4.6L engines, if the transmission control module (TCM) detects a failure with the transmission, the TCM sends a message to the instrument cluster over the CAN to illuminate the wrench warning indicator.
Plus The electronic throttle control system can turn on the wrench light.
It should be noted that the ETC system illuminates a powertrain malfunction indicator (wrench) on the instrument cluster when a concern is present. Concerns are accompanied by diagnostic trouble codes (DTCs) and may also illuminate the malfunction indicator lamp (MIL).

2007 PCED On Board Diagnostics SECTION 1: Description and Operation Procedure revision date: 08/10/2006 Torque Based Electronic Throttle Control (ETC)
Overview
The torque based ETC is a hardware and software strategy that delivers an engine output torque (via throttle angle) based on driver demand (pedal position). It uses an electronic throttle body, the powertrain control module (PCM), and an accelerator pedal assembly to control the throttle opening and engine torque. The ETC system replaces the standard cable operated accelerator pedal, idle air control (IAC) valve, 3-wire throttle position (TP) sensor, and mechanical throttle body.
Torque based ETC enables aggressive automatic transmission shift schedules (earlier upshifts and later downshifts). This is possible by adjusting the throttle angle to achieve the same wheel torque during shifts, and by calculating this desired torque, the system prevents engine lugging (low RPM and low manifold vacuum) while still delivering the performance and torque requested by the driver. It also enables many fuel economy/emission improvement technologies such as variable camshaft timing (VCT) (deliver same torque during transitions).
Torque based ETC also results in less intrusive vehicle and engine speed limiting, along with smoother traction control.
Other benefits of ETC are:
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  • packaging (no cable)
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It should be noted that the ETC system illuminates a powertrain malfunction indicator (wrench) on the instrument cluster when a concern is present. Concerns are accompanied by diagnostic trouble codes (DTCs) and may also illuminate the malfunction indicator lamp (MIL).
Electronic Throttle Body (ETB)
The ETB has the following characteristics:
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  1. There are 2 designs: parallel and in-series. The parallel design has the motor under the bore parallel to the plate shaft. The motor housing is integrated into the main housing. The in-series design has a separate motor housing.
  1. Two springs are used: one is used to close the throttle (main spring) and the other is in a plunger assembly that results in a default angle when no power is applied. This is for limp home reasons (the force of the plunger spring is 2 times stronger than the main spring). The default angle is usually set to result in a top vehicle speed of 48 km/h (30 mph). Typically this throttle angle is 7 to 8 degrees from the hard-stop angle.
  1. The closed throttle plate hard stop is used to prevent the throttle from binding in the bore (~0.75 degree). This hard stop setting is not adjustable and is set to result in less airflow than the minimum engine airflow required at idle.
  1. Unlike cable operated throttle bodies, the intent for the ETB is not to have a hole in the throttle plate or to use plate sealant. The hole is not required in the ETB because the required idle airflow is provided by the plate angle in the throttle body assembly. This plate angle controls idle, idle quality, and eliminates the need for an IAC valve.
  1. The TP sensor has 2 signal circuits in the sensor for redundancy. The redundant throttle position signals are required for increased monitoring reasons. The first TP signal (TP1) has a negative slope (increasing angle, decreasing voltage) and the second signal (TP2) has a positive slope (increasing angle, increasing voltage). During normal operation the negative slope TP signal (TP1) is used by the control strategy as the indication of throttle position. The TP sensor assembly requires 4 circuits.
  • 5-volt reference voltage
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  • TP1 voltage with negative voltage slope (5-0 volts)
  • TP2 voltage with positive voltage slope (0-5 volts)
Accelerator Pedal Position (APP) Sensors
The ETC strategy uses pedal position sensors as an input to determine the driver demand.
  1. There are 3 pedal position signals required for system monitoring. APP1 has a negative slope (increasing angle, decreasing voltage) and APP2 and APP3 both have a positive slope (increasing angle, increasing voltage). During normal operation APP1 is used as the indication of pedal position by the strategy.
  1. There are 2 VREF circuits, 2 signal return circuits, and 3 signal circuits (a total of 7 circuits and pins) between the PCM and the APP sensor assembly.
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  • APP3 voltage with positive voltage slope (0-5 volts)
  1. The pedal position signal is converted to pedal travel degrees (rotary angle) by the PCM. The software then converts these degrees to counts, which is the input to the torque based strategy.
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  2. your best ,take your vehicle to a qualified repair .
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The APP sensor is an input to the powertrain control module (PCM) and is used to determine the torque demand. There are 3 pedal position signals in the sensor. Signal 1, APPS1, has a negative slope (increasing angle, decreasing voltage) and signals 2 and 3, APPS2 and APPS3, both have a positive slope (increasing angle, increasing voltage). During normal operation APPS1 is used as the indication of pedal position by the strategy. The 3 pedal position signals make sure the PCM receives a correct input even if 1 signal has a concern. There are 2 reference voltage circuits and 2 signal return circuits for the sensor. For additional information, refer to Torque Based Electronic Throttle Control (ETC) in this section.

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I'm not 100% familiar with your console type but I expect that you get that particular message when the specific value YOU have determined as the being the threshold before your next maintenance interval (in regard to the millage) has been reached. The normal reading of the millage 'distance to service' before next maintenance should decrease until it reachs 0 then triggers the perform service alert message. Once your maintenance is done you should be able to reset the counter which will start a new count from the specified target value.
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- Turn your ignition swith on
- press step console button at repetition until you get the service interval display
- then press the reset button for few seconds
Hoping I'm telling right and that it will help
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Go to an auto parts store and purchase an OBD2 scanner and perform the diagnostic yourself. Some auto parts stores will do this for you for free and tell you what the code(s) mean
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