Start System Diagnosis Manual

Product Overview

This manual provides a comprehensive guide for diagnosing issues related to the engine’s starting system. The methodology outlined here helps identify various factors that may prevent the engine from starting efficiently.

Table of Contents

1. General Information
2. Engine
3. Fuel System
4. Electrical System
5. Undercarriage
6. Drive Train
7. Undercarriage Hydraulics
8. Upper Structure Hydraulics
9. Upper Structure

Key Features

• Systematic Approach: Detailed steps for diagnosing start system issues.
• Practical Requirements: Ensures the pre-diagnosis conditions are met for effective troubleshooting.
• Diagnostic Code Assist: Assistance in handling diagnostic trouble codes, specifically for the CKP and CMP sensors.

Benefits

• Identifies potential causes efficiently.
• Guides on rectifying engine start issues, thereby minimizing downtime.
• Ensures safe and reliable vehicle operation.

Usage Recommendations

• Verify the battery is fully charged and securely connected.
• Ensure normal engine speed during cranking.
• Check for sufficient fuel levels and purity (no air bubbles).
• Inspect air cleaner elements and fuel filters for anomalies.
• Use the correct type of fuel as specified.

Important Note: If a diagnostic trouble code related to the fuel system appears, initiate a code diagnosis first.

Diagnostic Aid: Clear memory if there are related CKP and CMP sensor codes detected as they may prevent the engine from starting.

Intermittent Issues Detection

For suspected intermittent problems, perform inspections focusing on:

• Harness connector connection issues:
• Loose or mismatched terminal connections
• Connector lock damages
• Wire disconnections or breaks due to harness wear or friction