This CAT C15 Top 2 document is a Caterpillar troubleshooting procedure for Eaton Top 2 transmission-related diagnostic codes on C15 on-highway engines. It focuses on 0054-06 Auxiliary Output #06 current high (66), the lockout solenoid circuit, related auxiliary output faults, and Cat ET special tests.
Official CAT C15 Top 2 document details
| Brand | CAT |
|---|---|
| Model coverage | C15 Truck Engine MXS; C15 On-Highway Truck MXS00001-UP |
| System/Group | C15 (MXS, NKS, or RKS) / DTCs; Eaton Top 2 Transmission Circuit – Test |
| Publication no. | RENR5088-10 |
| Year/Revision | Publication Date 01/02/2009; Date Updated 25/02/2009 |
| Pages | 14 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- 0054-06 Auxiliary Output #06 current high (66)
- Conditions Which Generate This Code
- System Response
- Test Step 1. Perform the following diagnostic procedure: Eaton Top 2 Transmission Circuit – Test
- Eaton Top 2 Transmission Circuit – Test
- System Operation Description
- Background Information
- System Problems
- Wiring Connections at the ECM
- Customer Specified Parameters
- Test Step 2. Inspect the Electrical Connectors and the Wiring
- Special Test procedures for Shift Solenoid and Lockout Solenoid
- Test Step 6. Check the Gear Ratios
Applicable truck models
This PDF applies to the Product: TRUCK ENGINE, Model: C15 TRUCK ENGINE MXS, Configuration: C15 On-Highway Truck MXS00001-UP. The procedure covers Eaton Top 2 operation when the Engine Control Module controls shifts between the top two gears, including output No. 6 for the lockout solenoid and output No. 7 for the shift solenoid. It also references ten speed and thirteen speed transmission gear positions, the splitter button, cruise control override behavior, air system pressure of 620 kPa (90 psi), and customer specified gear ratio parameters in Cat ET. For current manufacturer information, visit the Caterpillar official website.
Who needs this CAT C15 Top 2 manual
Mechanics, fleet technicians, and workshop owners need this manual when diagnosing 54-05, 54-06, 55-05, 55-06, or 191-07 faults on a CAT C15 engine using an Eaton Top 2 transmission. It is useful for checking ECM connector wiring, firewall bulkhead connectors, solenoid connector terminals, voltage test lamp behavior, and whether the transmission should be referred to the OEM dealer.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
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