This CAT C15 05-05 document provides the complete diagnostic procedure for fault code 0005-05 Cylinder #5 Injector Current Low (74) on Caterpillar C15 on-highway truck engines (MXS prefix). It details the conditions that generate the code, system response behavior, and a multi-step test sequence covering the injector solenoid circuit, harness continuity, and ECM connector inspection.
Official CAT C15 05-05 document details
| Brand | Caterpillar (CAT) |
| Model coverage | C15 Truck Engine MXS (MXS00001-UP) |
| System / Group | Electronic Unit Injector (EUI) solenoid circuit — SMCS 1290-038 |
| Publication no. | RENR5088-10 |
| Year / Revision | Published 01/02/2009, updated 25/02/2009 |
| Pages | 17 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- 0005-05 Cylinder #5 Injector Current Low (74) — Conditions Which Generate This Code, System Response
- Injector Solenoid Circuit — Test (System Operation Description)
- Cylinder Cutout Test procedure
- Injector Solenoid Test procedure
- Illustration: Electronic Unit Injector
- Schematic for C15 engines — P2 ECM connector pinout and valve cover connectors
- Test Step 1: Inspect Electrical Connectors and Wiring
- Test Step 3: Check the Variation of the Injectors between Cylinders
- Test Step 4: Injector Solenoid Test — Open / Short diagnosis
- Test Step 5: Check Harness between ECM and Valve Cover Base for Open Circuit
- Test Step 7: Check the ECM for an Open Circuit
- Test Step 8: Check for a Short Circuit
- Resistance measurement at P2 connector and engine ground stud
Applicable truck models
This publication applies to the Caterpillar C15 on-highway truck engine with configuration prefix MXS (MXS00001-UP). The engines covered use mechanically actuated, electronically controlled Electronic Unit Injectors (EUI) driven by a 105-volt pulse from the ECM. The diagnostic codes addressed span all six cylinders (1-05 through 6-06), covering both low-current (open circuit) and high-current (short circuit) injector faults. The document also references related procedures including Injector Code — Calibrate (DTC 253-02), Engine Misfires/Runs Rough, and Low Power/Poor Throttle Response troubleshooting. For additional Caterpillar service resources, visit Caterpillar Support.
Who needs this CAT C15 05-05 manual
Diesel mechanics and workshop owners diagnosing misfire, low power, or active injector fault codes on CAT C15 engines will use this document. It is essential for anyone performing solenoid circuit resistance checks, harness inspections at the P2 ECM connector (pins P2-99 through P2-118), or valve cover connector diagnostics — especially given the 90–120 volt shock hazard present in the EUI system.
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
