This 12-page PDF is a 12 pages actuator troubleshooting procedure published by Caterpillar for the C15 On-Highway Truck Engine (MXS configuration). It provides step-by-step diagnostic instructions for resolving DTC 0287-05 (Intake Valve Actuator #3 Current Low), including electrical connector inspection, solenoid testing via Cat ET, short and open circuit verification at the ECM and valve cover connectors, and component replacement guidance.
Official 12 pages actuator document details
| Brand | Caterpillar (CAT) |
| Model coverage | C15 Truck Engine MXS (MXS00001-UP) |
| System / Group | Intake Valve Actuator Circuit — DTCs 285 through 290 (current low / current high) |
| 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
- 0287-05 Intake Valve Actuator #3 Current Low (93) — Conditions, System Response
- Intake Valve Actuator Circuit — Test (System Operation Description)
- Intake Valve Actuator Solenoid Test prerequisites and procedure
- C15 schematic, P2 ECM connector pinout (Illustrations 1–2)
- Valve cover connector terminal identification (Illustration 3)
- Component locations: check valve, actuator solenoid, face seals, pressure sensor, pressure solenoid (Illustration 4)
- Test Step 1: Inspect Electrical Connectors and Wiring
- Test Step 2: Check for Active Diagnostic Codes via Cat ET
- Test Step 3: Create a Short Circuit at the Valve Cover Connector
- Test Step 4: Create a Short Circuit at the ECM
- Test Step 5: Open Wires at Valve Cover Connector
- Test Step 6: Verify Harness Continuity and Resistance Measurements
- Test Step 7: Solenoid Replacement Verification
Applicable truck models
This document applies to the Caterpillar C15 On-Highway Truck Engine, specifically the MXS serial number prefix (MXS00001-UP). The procedure covers all six intake valve actuator solenoids (cylinders 1–6) and their associated DTCs: 285-05/06, 286-05/06, 287-05/06, 288-05/06, 289-05/06, and 290-05/06. It is relevant to any on-highway truck equipped with the C15 engine featuring intake valve actuation. For additional Caterpillar technical resources, visit Caterpillar Support.
Who needs this 12 pages actuator manual
Diesel mechanics and workshop owners diagnosing low-power complaints or check engine lamp illumination related to intake valve actuator solenoid circuits on C15-powered trucks will find this procedure essential. It requires access to Cat Electronic Technician (ET) software, a multimeter, and standard wiring repair tools.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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