Toro 74060 - User Manual

Questions and Answers

M
Michael ChavezAug 18, 2025
What to do if system overvoltage on Toro 74060?
- W
  William HernandezAug 18, 2025
  If the system voltage of your Toro Lawn Mower Accessories is excessive (above 16 V), check the battery and engine charging system. If the issue persists, contact an Authorized Service Dealer.
E
efullerAug 21, 2025
What to do if the engine over temperature on Toro 74060 Lawn Mower Accessories?
- P
  Paul MasseyAug 21, 2025
  If the engine temperature of your Toro Lawn Mower Accessories is above the limit, check the oil level, clean any debris from the engine, and inspect the engine fan. If problems persist, contact an Authorized Service Dealer.
M
Michelle WilsonAug 23, 2025
What to do if low oil pressure on Toro 74060 Lawn Mower Accessories?
- C
  Christopher TaylorAug 23, 2025
  If the engine-oil pressure of your Toro Lawn Mower Accessories is below the limit, cycle the key switch to clear the fault. Check the oil level. If problems persist, contact an Authorized Service Dealer.
S
shane76Aug 25, 2025
What to do if clutch overcurrent on Toro 74060 Lawn Mower Accessories?
- P
  Peter WilliamsAug 26, 2025
  If the clutch current of your Toro Lawn Mower Accessories is above the limit, cycle the key switch to clear the fault. Check the PTO clutch condition and the related wiring. If the issue continues, contact an Authorized Service Dealer.
T
Thomas GarciaAug 27, 2025
What to do if clutch output fault on Toro 74060 Lawn Mower Accessories?
- R
  Rodney Diaz MDAug 27, 2025
  If the clutch output of your Toro Lawn Mower Accessories has a short or is open, and the clutch is stuck in the ON position, discontinue use and contact an Authorized Service Dealer. Check the clutch connection and associated wiring for an open circuit.
D
danielericksonAug 30, 2025
What to do if system voltage low on Toro 74060 Lawn Mower Accessories?
- W
  wmasonAug 30, 2025
  If the system voltage of your Toro Lawn Mower Accessories is below 12.3 V, check the battery and engine charging system. If the issue persists, contact an Authorized Service Dealer.
P
phallSep 1, 2025
What to do if system undervoltage on Toro Lawn Mower Accessories?
- M
  mguzmanSep 1, 2025
  If the system voltage of your Toro Lawn Mower Accessories is below the lower limit of 9 V, check the battery and engine charging system. Contact an Authorized Service Dealer if the issue persists.
M
Madison BaldwinSep 3, 2025
How to reset clutch on Toro Lawn Mower Accessories?
- S
  Sarah CarrollSep 4, 2025
  To reset the clutch on your Toro Lawn Mower Accessories, cycle the PTO switch to the OFF position and then back to the ON position to engage the clutch.
A
April HoustonSep 6, 2025
How to fix module communication error on Toro 74060 Lawn Mower Accessories?
- J
  jessica91Sep 6, 2025
  Check the electrical connections at the LDU and MCU module of your Toro Lawn Mower Accessories.
J
Jessica MccoySep 8, 2025
How to fix engine communication error on Toro Lawn Mower Accessories?
- K
  Karen WagnerSep 8, 2025
  Check the electrical connections at the module, interconnect between the engine wire harness, and chassis harness of your Toro Lawn Mower Accessories. Also, check the connections at the engine ECU. If problems persist, contact an Authorized Service Dealer.

Summary

Horizon Control Module Interface

Screen Icons

Explains various icons used on the information screen for machine operation.

Product Overview

Identifies key physical components of the Horizon Control Module and its controls.

Screen Display and Operation

Details the main screen, LED status light, buttons, and alarm functions.

Engine Monitoring and Control

Engine Speed Modes and Settings

Explains engine speed modes and how to adjust them.

System Status Indicators

Describes indicators for safety interlocks, engine temperature, speed, fuel, and cooldown time.

DPF Regeneration Process

Introduces the Diesel Particulate Filter regeneration process and its modes.

DPF Regeneration Status

Details screens indicating start, active, interrupted, and completed regeneration states.

Menu System and Diagnostics

Menu Navigation

Outlines how to access and navigate the module's menu system.

Maintenance and Service Information

Lists sub-menus for system maintenance, status of inputs/outputs, and error messages.

Service Reminders

Covers reminders for hydraulic oil, engine oil, and gearbox oil maintenance.

Gauges and Meters Menu

Engine and PTO Hours

Displays total and trip counters for engine and PTO hours.

Fuel Consumption and Economy

Shows fuel used and fuel economy per engine hour.

Trip Statistics

Provides detailed trip statistics including hours and fuel usage.

Advanced Settings and System Configuration

Accessing Advanced Settings

Explains how to enter advanced settings via passcode for configuration.

Service Resets and Historical Errors

Details resetting service reminders and viewing historical error logs.

Alarm Management

Manages activation and deactivation of audible alarms for various errors.

Engine Calibration and Defaults

Details engine speed calibration and resetting system to factory defaults.

Error Messages and Troubleshooting

Error Message Types

Lists and describes various error messages and their causes.

Error Acknowledgment and Specifics

Explains acknowledging alarms and details specific error scenarios.

Troubleshooting Guide

Provides a table correlating errors with corrective actions.

The Toro Horizon Control Module is a sophisticated electronic display and control system designed for Z Master Lawn Mowers, specifically models 74060, 74064, 74072, 74074, and 74096, with serial numbers 400000000 and up. This module serves as the central interface for operators to monitor and manage various aspects of their mower's operation, maintenance, and performance.

Function Description:

The Horizon Control Module provides real-time information and control capabilities through a backlit screen and multi-functional buttons. It displays critical operational data, system status, and error messages, enabling operators to make informed decisions and maintain the machine effectively. The module integrates with the mower's engine control unit (ECU) and other systems to provide a comprehensive overview of the machine's health and performance. Key functions include monitoring engine speed, hydraulic fluid temperature, engine temperature, fuel level, battery voltage, and the status of safety interlocks. It also manages the diesel particulate filter (DPF) regeneration process, provides maintenance reminders, and allows for adjustment of engine settings.

Important Technical Specifications:

The module is designed to operate within the mower's electrical system, monitoring various sensors and communicating with the ECU. It features a multi-colored LED status light that indicates normal operation (solid green), active faults (blinking red), or a clutch reset requirement (blinking green and orange). The display is backlit for visibility in low-light conditions. The system includes an audible alarm for critical and less critical errors, with distinct sounds for each. A 4-digit passcode (1982) protects access to advanced settings. The module tracks engine hours, PTO hours, and fuel consumption in US gallons/liters. It monitors system voltage for overvoltage (>16VDC) and undervoltage (<9VDC) conditions. Engine speed adjustments are made in 50 rpm increments.

Usage Features:

The Horizon Control Module offers several user-friendly features to enhance operation:

Screen Icons: A variety of icons provide quick visual cues for different functions and statuses, including Gauge and Meters, Low Engine Speed, Processing, Advanced Settings, Battery Voltage, Transmission-Oil Maintenance, Engine-Oil Temperature, Engine Hours, Fuel Level, Engine-Oil Maintenance, Cancel/Exit, PTO, No (for menu screens), Toggle Between Screens, Parking Brake, Yes, Enter/Return, Neutral Lock, Decrease, Previous, Operator Presence Control (OPC), Increase, Next, Max Engine Speed, Play/Start, Reset, Efficient Engine Speed, Pause/Stop, and Error Warning.
Engine Speed Modes: Operators can select from three engine speed modes: Low (for transport and wet mowing), Efficient (for normal mowing and fuel economy), and Maximum (for extreme mowing and high idle). The selected mode is illuminated on the panel.
Safety Interlocks: The module displays the status of safety interlocks, ensuring the machine operates only under safe conditions (e.g., PTO disengaged, parking brake engaged, motion-control levers in NEUTRAL-LOCK, operator present). It prevents engine startup or shutdown if interlock conditions are not met.
DPF Regeneration: The module actively manages the DPF regeneration process, which includes passive, auto, stationary, and recovery regeneration modes. It provides visual cues and alerts for regeneration status, including a 60-second timer for auto regeneration and prompts to increase RPM/load if conditions are not met. A CAUTION warns of high exhaust temperatures during regeneration.
Menu Navigation: The Menu Selection Screen, accessed by placing motion-control levers in NEUTRAL-LOCK and holding the two outside LDU buttons, allows navigation through Maintenance and Service, Gauges and Meters, and Advanced Settings menus.
Error Messages and Alarms: The system displays current error messages as text, along with the engine hours when they occurred. It provides audible alarms (fast chirp for critical, slow chirp for less critical) and turns the LED red for active faults. Operators can acknowledge and silence some alarms.
Auto Idle Down Mode: If the operator leaves the seat and safety interlocks allow, the engine enters auto idle mode, reducing engine speed to low transport speed. It automatically returns to the previously selected speed when the operator returns to the seat.
Engine Speed Adjustment: In Advanced Settings, operators can adjust the Maximum, Efficient, and Low set points for both transport (clutch disengaged) and mow (clutch engaged) modes.
Calibration: The module allows for calibration of engine settings to match actual engine speed with commanded engine speed.

Maintenance Features:

The Horizon Control Module incorporates several features to assist with machine maintenance:

Maintenance Reminders: The Maintenance and Service Menu provides screens for Hydraulic Trans Oil, Engine Oil, and Deck Gearbox Oil, displaying hours remaining until the next service is due. It also shows service history, indicating when previous resets were performed.
DPF Soot Percentage: The Engine-Off Screen and Maintenance and Service Menu display the DPF soot percentage as a bar graph, indicating when a DPF regeneration may be needed. Operators can initiate a manual stationary regeneration if the soot percentage is high.
Historical Error Log: The Historical Error screen in the Advanced Settings menu logs errors that are no longer active, showing the number of times each error occurred and the engine hour at which it last occurred.
Module Information: The Module Information screen displays the installed software and hardware versions for both the Logic Display Unit (LDU) and the Master Control Unit (MCU), which is useful for troubleshooting and service.
Factory Defaults: The Factory Defaults screen allows resetting system settings, including engine speed and alarm settings, back to their original factory configurations.
Troubleshooting Guide: The manual provides a comprehensive troubleshooting table that lists system error messages, status LED indications, system actions, issue descriptions, and recommended corrective actions for various faults, such as Service the Engine Oil, Low Oil Pressure, Engine Over Temperature, System Overvoltage, Clutch Overcurrent, Engine MIL Errors, and Communication Errors. This guide helps operators and technicians diagnose and resolve issues efficiently.