This 9-page CAT C15 coolant diverter troubleshooting document provides step-by-step diagnostic procedures for fault code 0284-05 (Engine Coolant Diverter current low) on Caterpillar C15 on-highway truck engines with MXS configuration. It details the conditions that generate the code, system response behavior, and a complete solenoid circuit test sequence using Caterpillar Electronic Technician (Cat ET).
Official CAT C15 coolant diverter troubleshooting document details
| Brand | Caterpillar (CAT) |
| Model coverage | C15 Truck Engine MXS (MXS00001-UP) |
| System / Group | DTCs — Engine Coolant Diverter Circuit (SMCS 5479-038-CLT) |
| Publication no. | RENR5088-10 |
| Year / Revision | Published 01/02/2009, updated 25/02/2009 |
| Pages | 9 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- 0284-05 Engine Coolant Diverter current low (98) — Conditions Which Generate This Code
- System Response
- Engine Coolant Diverter Circuit – Test — System Operation Description
- Coolant Diverter Valve Test (Cat ET Special Tests procedure)
- Test Step 1: Inspect Electrical Connectors and Wiring
- Test Step 2: Check for Active Diagnostic Codes
- Test Step 3: Short the Wires at the Solenoid
- Test Step 4: Short the Circuit at the ECM (P2 connector)
- Test Step 5: Create an Open at the Solenoid
- Test Step 6: Create an Open at the ECM
- Schematics — P2 ECM connector, solenoid for the coolant diverter valve
Applicable truck models
This document applies to the Caterpillar C15 on-highway truck engine in the MXS configuration (serial numbers MXS00001-UP). It also references configurations NKS and RKS within the C15 DTC group. The procedure is valid only for engines equipped with an engine coolant diverter valve and a jacket water aftercooler in the intake air system. The ECM monitors the diverter solenoid via the P2 connector at pins P2-5 (wire T855-BU) and P2-79 (wire H807-YL, return for the intake valve actuator). For additional product support and parts information, visit the Caterpillar official support page.
Who needs this CAT C15 coolant diverter troubleshooting manual
Fleet mechanics and workshop technicians diagnosing a check engine lamp caused by DTC 0284-05 or 0284-06 on C15 engines will need this reference. It is also essential for anyone performing the Coolant Diverter Valve Test through Cat ET when cab temperature runs low in cold climates due to aftercooler overcooling.
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
