Question about GMC Envoy
Posted by Anonymous on
The internal resistor may defective. It's easier to just replace it.
Posted on Jul 24, 2016
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Posted on Jan 02, 2017
the translation isnt very good but i think from the codes you need a new throttle position pedal sensor ,its the one on teh throttle pedal under the dash ,the other codes have no meaning to me as they are B codes and these would only show on a dealer diagnostic machine so iam surprissed you have managed to extract these codes ,so i assume you have visited a chinese web site to buy some of their lovely pirate software ,iam saving up for mine with the earnings from this web site
Posted on Feb 21, 2011
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Cherokee, Grand Cherokee, 1999-2005
Throttle Position Sensor
The 3 wire Throttle Position Sensor (TPS) is mounted on the throttle body and is connected to the throttle blade.
The TPS is a 3wire variable resistor that provides the Powertrain Control Module (PCM) with an input signal (voltage) that represents the throttle blade position of the throttle body. The sensor is connected to the throttle blade shaft. As the position of the throttle blade changes, the resistance (output voltage) of the TPS changes.
The PCM supplies approximately 5 volts to the TPS. The TPS output voltage (input signal to the PCM) represents the throttle blade position. The PCM receives an input signal voltage from the TPS. This will vary in an approximate range of from .26 volts at minimum throttle opening (idle), to 4.49 volts at wide-open throttle. Along with inputs from other sensors, the PCM uses the TPS input to determine current engine operating conditions. In response to engine operating conditions, the PCM will adjust fuel injector pulse width and ignition timing.
The PCM needs to identify the actions and position of the throttle blade at all times. This information is needed to assist in performing the following calculations:
Ignition timing advance Fuel injection pulse-width Idle (learned value or minimum TPS) Off-idle (0.06 volt) Wide Open Throttle (WOT) open loop (2.608 volts above learned idle voltage) Deceleration fuel lean out Fuel cutoff during cranking at WOT (2.608 volts above learned idle voltage) A/C WOT cutoff (certain automatic transmissions only)
Removal & Installation
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