B3000 4WD V6-3.0L OHV (1995)
Technical Service Bulletin # F00896
Date: 960418
Throttle Position Sensor - Diagnosis
Bulletin No.: 008/96
Issued: 04/18/96
Revised:
Category
F
Applicable Model/s
1994-95 B-Series
1993-94 Navajo
Subject
THROTTLE POSITION SENSOR
DESCRIPTION
The information in this bulletin is provided to ensure that the "Throttle Position Sensor" (TPS) is not replaced unnecessarily.
The bulletin contains:
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TPS General Information
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Description of Diagnostic Trouble Codes (DTC) - Codes that may lead the technician to replace the TPS.
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Cause of DTCs
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Troubleshooting Tips (Measuring TPS Voltage)
Service managers and technicians should place the attached instructions in the beginning of section F of the applicable workshop manuals.
This information supplements data already listed in the workshop manual. Manuals will be updated with this information at the next printing.
THROTTLE POSITION SENSOR (TPS) GENERAL INFORMATION
1.
The TPS is a rotary potentiometer that provides a voltage signal to the Powertrain Control Module (PCM) that is linearly proportional to the angle
of the throttle plate.
2.
The TPS has a three (3) blade electrical connector that is plated. Plating on the connector prevents corrosion and increases durability.
3.
The TPS is mounted on the throttle body and is NOT ADJUSTABLE.
4.
The TPS is rotated by the throttle shaft and four (4) operating conditions are determined by the PCM from the TPS voltage signal.
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Closed Throttle (Idle or Deceleration)
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Part Throttle (Cruise or Moderate Acceleration)
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Wide Open Throttle (WOT) (Maximum Acceleration, De-Choke on Crank and A/C Shut-Off)
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Throttle Angle Rate
BACKGROUND
Recent revisions to the TPS have increased reliability and durability.
DIAGNOSTIC TROUBLE CODES (DTCs)
To correctly diagnose TPS failure using DTCs, technicians should know which type of On Board Diagnostics (OBD) system installed in the vehicle. The
key differences between EEC-IV, OBD I and the EEC-V, OBD II are the monitors.
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EEC-IV Monitors - Identify system and component issues.
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EEC-V Monitors - Identify the ability of the system and components to maintain low emission levels.
