This Cummins coolant level sensor document is a 5-page troubleshooting file for Fault Code 515 or 516 on ISB CM550 engine control systems. It explains the coolant level sensor circuit, connector inspections, harness short checks, ECM supply voltage testing, and final fault-code clearing steps for workshop diagnosis.
Official Cummins coolant level sensor document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB CM550 (1990-94) |
| System/Group | DTCs; coolant level sensor circuit |
| Publication no. | Fault Code 515-516 |
| Year/Revision | Unknown |
| Pages | 5 |
| File size | 0.4 MB |
| Format | |
| Language | English |
Document table of contents
- FAULT CODE: 515 or 516
- PID: P091
- SPN: 091
- FMI: 3 or 4
- COOLANT LEVEL SENSOR CIRCUIT
- Description
- Component location
- Troubleshooting steps
- Step 1A: coolant level sensor connector and engine harness inspection
- Step 1B: check for active fault codes using the diagnostic tool
- Step 2A: ECM connector and engine harness inspection
- Step 2B: short circuit to ground resistance checks
- Step 2C: short circuit from pin to pin resistance checks
- Step 2D: short circuit to a voltage source checks
- Step 3A: ECM sensor supply voltage check
- Step 4A: disable fault code and verify inactive status
- Step 4B: clear inactive fault codes
Applicable truck models
This file applies to Cummins ISB CM550 coverage listed as 1990-94 in the DTCs group. The document states that the coolant level sensor is an OEM-supplied component, with location varying by vehicle, and that the sensor is located in the radiator top tank or surge tank. It also notes that Sterling trucks utilize ECM pin A22 for coolant level sensing through a 2-pin sensor. For manufacturer information, visit Cummins official website.
Who needs this Cummins coolant level sensor manual
Mechanics, fleet technicians, and workshop owners need this coolant level sensor manual when diagnosing Fault Code 515 or 516, PID P091, SPN 091, FMI 3 or 4. It is useful when inspecting connector pins, checking resistance above 100k ohms, confirming less than (+) 1.0 VDC on harness circuits, or verifying (+) 4.5 to 5.25 VDC ECM sensor supply voltage.
The full PDF is available in the DiagTechPro manuals library, free account required to download.
Related manuals library
Sản phẩm liên quan cho hãng này
Cùng brand theo taxonomy hiện có trong catalog WooCommerce.
Cummins Calterm Version 5.16 – Advanced ECM Control and Precision Tuning for Cummins Engines
Cummins INSITE 9.3 – The Essential Diagnostic Tool for Cummins Engines
Cummins InCal CE – The Calibration and Configuration Tool for Cummins Engines
