Williams Controls 133284
Williams Controls 133284 Throttle Position Sensor also known as Accelerator Pedal Position Sensor (APS), is a high-precision TPS developed by Williams Controls for heavy-duty or medium-duty commercial vehicles, serving as a direct OEM replacement for Navistar International and cross-compatible with multiple industry part numbers such as Williams 133284, 131973, 85101350, 8C40-9F832-BA, 2507256C91, 2586248C9,2603893c91and 2586248C9.
Technical Specifications
Williams Controls Throttle Position Sensor
| Parameter | Details |
|---|---|
| Part Number | williams controls 133284 |
| Alternative Names | Accelerator Pedal Position Sensor (APS), Throttle Position Sensor (TPS) |
| Primary Application | Heavy-duty trucks, medium-duty commercial vehicles (on-highway/off-road) |
| Operating Voltage | 5V DC (regulated input, compatible with 12V/24V vehicle electrical systems) |
| Signal Output | 0.5V–4.5V linear voltage (0%–100% throttle position) |
| Temperature Range | -40°C to +125°C (transient tolerance: +150°C for engine bay heat spikes) |
Interchangeable Part Numbers
Williams Controls TPS
| Parameter | Part Number |
|---|---|
| Navistar OEM | 2603893C91 (direct replacement), 2586248C9, N8894090 |
| Williams Controls | williams controls 131973 (functional equivalent for Volvo/International ProStar), WCS-134734 |
| Volvo OEM | 85101350 |
| Ford OEM | 8C40-9F832-BA |
| Aftermarket | Dorman 977-023, ACDelco 213-4635,Bosch 0280122031X, Freightliner WIL131973, 94600-8C100 |
Williams Controls Part Numbers Explained
- 133284 – Original Williams TPS part number, used across multiple OEMs
- 131973 – Williams supersession of 131040, with improved durability and electrical interface, Compatible with: Freightliner WIL131973, PACCAR 131973, Navistar 2587164C91
- 134030 – Williams variants with different mounting configurations
- 134143 – Williams variants with different mounting
- 134734 – Williams variants with different mounting
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FAQ
international 133284-2603893c91
Are WCS-133284, 2603893C91, and 8C40-9F832-BA interchangeable?
Yes, these part numbers are cross-compatible for specific heavy-duty/medium-duty commercial vehicles:
WCS-133284 (Williams Controls) is a direct replacement for Navistar 2603893C91.
8C40-9F832-BA (Ford OEM) works with Navistar/Volvo vehicles using Navistar-sourced powertrains.
All three share the same 5V operating voltage, 0.5V–4.5V signal output, and all are 6-pin AMP connector (see: 6 pin accelerator pedal position sensor wiring diagram).
Do TPS parts like N8894090 or 8C40-9F832-BA require calibration after installation
Yes, mandatory calibration is required for all these TPS models to ensure signal accuracy:
Tools: Use OEM-specific software (Navistar ServiceMaxx for N8894090, Ford IDS for 8C40-9F832-BA, Cummins INSITE for WCS-133284).
Calibration targets: 0.50V ±0.02V (idle) and 4.50V ±0.02V (WOT).
Validation: Perform 3 full throttle cycles (idle→WOT→idle) to confirm linear signal response.
Exception: No calibration needed for exact OEM replacements if the ECU retains previous settings (rare for heavy-duty vehicles).
Which vehicles are compatible with N8894090, and is it backward-compatible with older Navistar models?
N8894090 is a 2018+ Navistar OEM TPS with limited backward compatibility:
Compatible models: Navistar ProStar/LoneStar/WorkStar (2018–2024), CV/MV Series (2019–2024) with MaxxForce/Cummins engines.
Backward compatibility: Not directly compatible with pre-2018 Navistar vehicles. Use adapter harness P/N 1825406C92 for conversion.
Key difference from predecessor (2603893C91): Gold-plated connector contacts, integrated signal filtering
