This CAT C15 sensor test document is a Caterpillar troubleshooting procedure for engine pressure sensor open or short circuit faults on C15 on-highway truck engines. It identifies diagnostic code 0385-03 / 385-3 Intake Valve Actuation System Oil Pressure voltage high and directs the technician to the Engine Pressure Sensor Open or Short Circuit – Test. The file also covers related oil pressure, boost pressure, and barometric pressure voltage high and voltage low codes.
Official CAT C15 sensor test document details
| Brand | CAT |
| Model coverage | C15 TRUCK ENGINE MXS; C15 On-Highway Truck MXS00001-UP |
| System/Group | C15 (MXS, NKS, or RKS) / DTCs; Intake Valve Actuation System Oil Pressure; engine pressure sensors |
| Publication no. | RENR5088-10 |
| Year/Revision | Publication Date 01/02/2009; Date Updated 25/02/2009 |
| Pages | 13 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- 0385-03 Intake Valve Actuation System Oil Pressure voltage high (95)
- Conditions Which Generate This Code
- System Response
- Engine Pressure Sensor Open or Short Circuit – Test
- System Operation Description
- Background Information
- 108-3 Diagnostic Code and High Crankcase Pressure
- Schematic for engine pressure sensors
- Locations of the engine pressure sensors
- Terminal locations at the P2 ECM connector for the engine pressure sensors
- Terminal locations at the sensor connector for the engine pressure sensors
- Test Step 1. Determine if the Code is Logged or Active
- Test Step 3. Check the Supply Voltage at the Sensor Connector
- Test Step 4. Check for Battery Voltage on the Signal Wire
- Test Step 6. Check the ECM for Proper Operation
- Test Step 7. Check the Signal Wire for a Short Circuit
Applicable truck models
This procedure applies to the Product: TRUCK ENGINE, Model: C15 TRUCK ENGINE MXS, Configuration: C15 On-Highway Truck MXS00001-UP. The sampled pages show coverage for pressure sensors used by the engine ECM, including boost pressure sensor, barometric pressure sensor, engine oil pressure sensor, and intake valve actuation pressure sensor. For official manufacturer information, visit Caterpillar.
Who needs this CAT C15 sensor test manual
Workshop owners, fleet technicians, and truck mechanics need this C15 sensor test manual when diagnosing -3 and -4 pressure sensor codes with Cat ET, a multimeter, the P2 ECM connector, and the sensor connector. It is especially relevant when code 385-3 is active or logged and the ECM detects signal voltage greater than 4.6 VDC for more than eight seconds.
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