This CAT C15 brake switch troubleshooting document provides the complete diagnostic procedure for fault code 0247-11 (Brake Pedal Switch #2) on Caterpillar C15 on-highway truck engines with MXS prefix. It details the conditions that generate the code, system response, and a step-by-step circuit test sequence for the service brake pedal position switch 2.
Official CAT C15 brake switch troubleshooting document details
| Brand | Caterpillar (CAT) |
| Model coverage | C15 Truck Engine MXS (MXS00001-UP) |
| System/Group | Brake Pedal Position Switch 2 — DTC 0247-11 (SMCS 1435-038-BRK) |
| Publication no. | RENR5088-10 |
| Year/Revision | Published 01/02/2009, Updated 25/02/2009 |
| Pages | 8 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- 0247-11 Brake Pedal Switch #2 Fault — Conditions Which Generate This Code, System Response
- Service Brake Pedal Position (Switch 2) Circuit — Test: System Operation Description
- Table 1: Setting For Transmission Style Parameter — Necessary Switches
- Schematic for Service Brake Pedal Position (Switch 2) — Illustration 1
- Test Step 1: Inspect the Electrical Connectors and the Wiring
- Test Step 2: Check the Switch Status on Caterpillar Electronic Technician (ET)
- Test Step 3: Create an Open Circuit and a Short Circuit at the Switch
- Test Step 4: Check for Proper Operation of the ECM
Applicable truck models
This manual applies to Caterpillar C15 on-highway truck engines with the MXS serial number prefix (configuration MXS00001-UP). The fault code and circuit test apply when the Transmission Style parameter is programmed to Automatic Option 2 or Automatic Option 3, which require a redundant service brake pedal position switch. The service brake pedal position switch 2 connects to +Battery rather than sensor common, providing full redundancy with switch 1. Vehicles equipped with manual transmissions or Automatic Option 1 do not use this second switch. For additional product specifications and support resources, visit the Caterpillar official support page.
Who needs this CAT C15 brake switch troubleshooting manual
Diesel technicians and workshop owners servicing C15-powered trucks that exhibit cruise control lockout, PTO disengagement, or idle speed faults linked to DTC 0247-11 will find this manual essential. It walks through connector inspection at the J1/P1 ECM connector (pin P1-64), Cat ET status verification, jumper-wire short/open circuit testing, and ECM validation — covering every diagnostic path from harness fault to ECM replacement.
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