This CAT C15 289-05 actuator troubleshooting document provides the complete diagnostic procedure for DTC 0289-05 (Intake Valve Actuator #5 — Current Low) on Caterpillar C15 on-highway truck engines with MXS serial prefix. It details the conditions that generate the code, system response behavior, step-by-step electrical testing using Caterpillar Electronic Technician (Cat ET), and repair instructions for open-circuit and short-circuit faults in the actuator solenoid wiring.
Official CAT C15 289-05 actuator document details
| Brand | Caterpillar (CAT) |
| Model coverage | C15 Truck Engine MXS (MXS00001-UP) |
| System / Group | Intake Valve Actuation System — DTCs (SMCS 5479-038-IL) |
| 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
- 0289-05 Intake Valve Actuator #5 Current Low (94) — Conditions Which Generate This Code
- System Response — default torque map, low power behavior, check engine lamp
- Intake Valve Actuator Circuit – Test — System Operation Description
- Intake Valve Actuator Solenoid Test prerequisites and procedure (Cat ET)
- C15 schematic — P2 ECM connector pin locations (supply and return wires for actuators 1–6)
- Valve cover connector terminal identification for C15 engines
- Component locations — check valve, actuator solenoid, face seals, pressure sensor, pressure solenoid
- Test Step 1: Inspect Electrical Connectors and Wiring (45 N pull test, torque check)
- 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 (J2/P2 connector)
- Test Step 5: Open the Wires at the Valve Cover Connector
- Test Step 6–7: Isolate solenoid faults, resistance measurements, wire continuity checks
- Repair procedures — solenoid replacement, harness repair, ECM replacement
Applicable truck models
This procedure applies to Caterpillar C15 on-highway truck engines with the MXS serial prefix (configuration MXS00001-UP). The intake valve actuation system is hydraulically operated and electrically controlled via solenoids on cylinders 1 through 6. The document covers all related DTCs from 285-05/06 through 290-05/06, making it the single reference for any intake valve actuator current-low or current-high fault on this engine series. Wiring diagrams reference the P2 ECM connector and the front valve cover connector specific to C15 engines. For official Caterpillar parts and service information, visit Caterpillar Support.
Who needs this CAT C15 289-05 actuator manual
Diesel mechanics and workshop owners diagnosing low-power complaints or check-engine-lamp illumination tied to intake valve actuator solenoid faults on C15 truck engines will find every required test step, pin-out reference, and repair action in this document. Access to Caterpillar Electronic Technician (Cat ET) is required to perform the solenoid test described in the procedure.
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