This document is a CAT C15 04-06 manual covering diagnostic code 0004-06 (Cylinder #4 Injector Current High) for C15 on-highway truck engines with MXS serial prefix. It provides step-by-step test procedures for identifying short circuits, open circuits, and faulty injectors in the Electronic Unit Injector (EUI) solenoid circuit. The guide also applies to all twelve injector current diagnostic codes across cylinders 1 through 6.
Official CAT C15 04-06 document details
| Brand | Caterpillar (CAT) |
| Model coverage | C15 Truck Engine MXS (MXS00001-UP) |
| System/Group | Electronic Unit Injector Solenoid Circuit — DTC 0004-06 |
| 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
- 0004-06 Cylinder #4 Injector Current High (73) — Conditions, System Response, and Test Step 1
- Injector Solenoid Circuit – Test — System Operation Description
- Electronic Unit Injector illustration and C15 engine schematic
- P2 ECM Connector pinout and valve cover connector terminal identification
- Test Step 1: Inspect Electrical Connectors and Wiring
- Test Step 3: Check the Variation of the Injectors between Cylinders (Cylinder Cutout Test)
- Test Step 4: Injector Solenoid Test — OK / Open / Short result interpretation
- Test Step 5: Check Harness between ECM and Valve Cover Base for Open Circuit
- Test Step 7: Check the ECM for an Open Circuit (257-8718 Adapter Cable breakout procedure)
- Test Step 8+: Check the ECM for a Short Circuit
- Return line resistance measurement and final injector replacement steps
Applicable truck models
This manual applies to Caterpillar C15 on-highway truck engines with the MXS serial number prefix (configuration MXS00001-UP). The procedures cover the 105-volt Electronic Unit Injector system used on these engines, including P2 ECM connector pins P2-99 through P2-118 and valve cover base connectors. The document also references companion procedures for NKS and RKS serial prefix C15 engines sharing the same injector solenoid architecture. For official Caterpillar parts lookup and additional service information, visit Caterpillar Support and Service Resources.
Who needs this CAT C15 04-06 manual
Diesel mechanics and workshop owners diagnosing misfires, low power, or injector-related fault codes on C15-powered trucks need this manual. It is essential for anyone using Caterpillar Electronic Technician (Cat ET) to perform the Injector Solenoid Test or Cylinder Cutout Test and must trace wiring faults through the ECM harness, valve cover connectors, or individual injector returns.
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
