Automotive Flow Chart

No Start Condition Diagnostic Flowchart

A comprehensive troubleshooting guide for vehicle no start conditions, covering battery, starter, spark, fuel systems, and electrical connection issues

flowchart TD
    A[No Start Condition] --> B[Try to Start]
    B -->|No Crank| C[Check Battery]
    B -->|Cranks No Start| D[Check For Spark]
    B -->|Intermittent Start| E[Check Connections]

    C -->|Dead Battery| C1[Load Test Battery]
    C -->|Good Battery| C2[Check Starter]
    C -->|Corroded| C3[Clean Terminals]
    C1 -->|Failed| C4[Replace Battery]
    C2 -->|Failed| C5[Replace Starter]
    
    D -->|No Spark| D1[Check Coils]
    D -->|Has Spark| D2[Check Fuel]
    D -->|Weak Spark| D3[Check Power Supply]
    D1 -->|Failed| D4[Replace Coils]
    D2 -->|No Fuel| D5[Check Pump/Pressure]

    E -->|Battery Cables| E1[Clean/Replace]
    E -->|Starter| E2[Check Solenoid]
    E -->|Security System| E3[Check Key/Immobilizer]
    E1 -->|Still Issues| E4[Test Voltage Drop]
    E2 -->|Failed| E5[Replace Starter]