This PACCAR DTC 17103 outside temperature diagnostic manual provides step-by-step troubleshooting procedures for inoperative or inaccurate temperature displays in 2011 and newer PACCAR cab instrumentation systems. Published by PACCAR as part of the Electrical System Service Manual, it equips technicians with the diagnostic workflow and resistance specifications needed to isolate faults in the outside air temperature circuit.
The manual is designed for use with the Electronic Service Analyst (ESA) diagnostic tool and covers both CECU (Cab Electronic Control Unit) and ICU (Instrumentation Control Unit) architectures.
Document details and specifications — PACCAR DTC 17103
| Brand | PACCAR |
| System/Group | DTCs / Cab Instrumentation |
| Publication number | PM819003/KM815056 |
| Year/Revision | 09/16/2011 |
| Pages | 4 |
| File size | 0.1 MB |
| Format | |
| Language | English |
Table of contents
- Outside Air Temperature Display Inoperative – DTC 17103 and DTC 17104
- Step-by-step diagnostic procedures using ESA software
- Monitor mode testing for sensor-to-control-unit verification
- Simulate mode testing for control-unit-to-gauge-cluster communication
- Diagnostic trouble code interpretation (DTC 17103 open circuit, DTC 17104 short circuit)
- Sensor resistance reference table (–40°C to +25°C / –40°F to +77°F)
- Ground and signal wire continuity checks
- Alternate test method using resistor decade box simulation
- Fault isolation procedures for sensor vs. wiring defects
- CECU pinout and connector terminal reference
Applies to these models
This DTC 17103 outside air temperature manual applies to PACCAR trucks and cab systems manufactured from 2011 onwards equipped with multiplexed instrumentation and thermistor-based outside air temperature sensors mounted in the driver’s side mirror. It covers diagnostic procedures regardless of whether the vehicle uses a CECU or ICU control architecture. For official PACCAR technical support and service bulletins, visit PACCAR official.
Who needs this DTC 17103 outside air temperature manual
Truck mechanics and workshop technicians diagnosing inoperative or inaccurate cab temperature displays on PACCAR vehicles will require this manual. Service professionals with access to ESA diagnostic software and multimeter test equipment can use these procedures to rapidly identify whether faults originate in the thermistor sensor itself, wiring harnesses, or the cab electronic control unit.
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