This C15 fuel temperature DTCs troubleshooting guide provides the complete diagnostic procedure for code 0174-03 (Fuel Temperature voltage high) on Caterpillar C15 on-highway truck engines (MXS configuration). The 12-page document details the conditions that generate the fault, the ECM default response, and a seven-step test sequence covering wiring inspection, sensor replacement, and ECM verification.
Official C15 fuel temperature DTCs document details
| Brand | Caterpillar (CAT) |
| Model coverage | C15 Truck Engine MXS (MXS00001-UP) |
| System / Group | Fuel Temperature Sensor — Diagnostic Trouble Codes (SMCS 1439-038-TA; 1922-038) |
| Publication no. | RENR5088-10 |
| Year / Revision | Published 01/02/2009, Updated 25/02/2009 |
| Pages | 12 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- 0174-03 Fuel Temperature Voltage High (13) — Conditions Which Generate This Code, System Response
- Engine Temperature Sensor Open or Short Circuit — Test (covers codes 105-03, 105-04, 110-03, 110-04, 171-03, 171-04, 174-03, 174-04)
- Pull-Up Voltage explanation and sensor schematic (Illustration 1)
- P2 and P1 ECM connector pin assignments (P2-13, P2-30, P2-56, P2-62, P1-18, P1-26)
- Sensor location illustrations — fuel temperature sensor, intake manifold air temperature sensor, coolant temperature sensor
- Test Step 1: Inspect Electrical Connectors and Wiring (45 N pull test, torque check 6.0 N·m)
- Test Step 2: Check for Active Diagnostic Codes using Caterpillar Electronic Technician (Cat ET)
- Test Step 3: Disconnect suspect sensor — verify code change from 04 to 03
- Test Step 4: Measure pull-up voltage at sensor connector (5.5 ± 0.5 VDC)
- Test Step 5: Check the Signal Wire for a Short Circuit (resistance above 20,000 Ohms)
- Test Step 6: Create a Short at the Suspect Sensor Connector using jumper wire
- Test Step 7: Check the Operation of the ECM — open and short test at ECM connector
Applicable truck models
This troubleshooting guide applies to the Caterpillar C15 on-highway truck engine, specifically configuration MXS00001-UP. The diagnostic procedure also covers the intake manifold air temperature sensor, coolant temperature sensor, and optional ambient air temperature sensor sharing the same circuit design on C15 engines. For additional product support and parts information, visit Caterpillar’s official website.
Who needs this C15 fuel temperature DTCs manual
Diesel mechanics and workshop owners diagnosing a 0174-03 active fault code on a C15 engine will find the step-by-step sensor and harness tests essential. The procedure requires Cat ET and a multimeter and guides technicians from connector inspection through ECM replacement if all wiring checks pass.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
CAT Perkins Pack – Premium Power & Performance by Caterpillar
CAT SIS
