If your Honda Grom’s Check Engine Light (MIL) has illuminated, your motorcycle is experiencing poor performance, or an electrical component has stopped working, it’s important to identify the root cause before replacing parts unnecessarily.

Our Professional Honda Grom Diagnostic Service uses advanced diagnostic equipment, factory service information, and experienced troubleshooting techniques to accurately identify mechanical and electrical issues. Once the problem has been diagnosed, your diagnostic fee is credited toward the cost of the repair if you choose to have the work completed by us.

Mechanical Diagnostic Service – $200.00

Complete Mechanical Inspection

• Engine operation
• Idle quality
• Acceleration performance
• Fuel delivery & air intake system
• Cooling system
• Drive chain & sprockets
• Clutch & transmission operation
• Exhaust system
• Vacuum leaks
• Engine noises & vibration

Performance Evaluation

• Poor acceleration or loss of power
• Rough idle, hesitation, stalling
• Hard starting or overheating
• Excessive vibration or unusual noises
• Reduced fuel economy

Road Test (When Safe)

• Engine response & throttle performance
• Shifting & clutch engagement
• Overall rideability

Electrical Diagnostic Service – $250.00

Electronic System Diagnosis

• Battery condition & charging system
• Stator output & regulator/rectifier
• Starter & ignition system
• Wiring harness, connectors, grounds
• Fuse & relay inspection
• Voltage, resistance & continuity testing

ECU & Check Engine Light Diagnostics

• Retrieve diagnostic trouble codes (DTCs)
• Interpret fault codes & analyze live sensor data
• Identify malfunctioning sensors
• Verify repairs & clear codes (if applicable)

Sensor & Component Testing

• Oxygen sensor, TPS, ECT, IAT
• Fuel injector & ignition coil
• Crankshaft position sensor
• Fuel pump circuit
• Side stand, neutral & kill switch
• Starter relay

Common Problems We Diagnose

• Check Engine Light (MIL)
• Hard starting or no-start
• Battery drain or charging failure
• Electrical shorts or blown fuses
• Misfiring engine or rough idle
• Loss of power or overheating
• Fuel injector & ignition issues
• Sensor failures or wiring damage
• Intermittent electrical faults

Benefits of Professional Diagnostics

• Accurate Problem Identification: Pinpoints the true cause instead of guesswork.
• Saves Time & Money: Prevents unnecessary parts replacement.
• Advanced Diagnostic Equipment: Professional tools for mechanical & electrical systems.
• Prevents Larger Repairs: Early detection avoids major failures.
• Improves Reliability: Keeps your Honda Grom running safely and efficiently.

Signs Your Honda Grom Needs Diagnostic Service

• Check Engine Light is on
• Motorcycle won’t start
• Poor acceleration or rough idle
• Stalling or overheating
• Battery repeatedly dies
• Lights flicker or dim
• Blown fuses or electrical faults
• Decreased fuel economy
• Strange noises or vibration
• Intermittent starting problems

Why Professional Diagnostics Matter

Modern Honda Grom motorcycles rely on both mechanical and electronic systems. A warning light or performance issue may have multiple causes, making accurate diagnosis essential. Our technicians follow a systematic diagnostic process to identify the root cause before recommending repairs—minimizing downtime, preventing unnecessary parts replacement, and ensuring your motorcycle is repaired correctly.

Diagnostic Fee Credited Toward Repairs: If you choose to have the repair completed by us, your diagnostic fee is applied toward the repair cost.

Schedule Your Honda Grom Diagnostic Service Today

Whether your Honda Grom has a Check Engine Light, starting issue, performance problem, or electrical fault, our experienced technicians can accurately diagnose the issue using professional equipment and proven troubleshooting methods.

Accurate Diagnosis. Reliable Repairs. Honda Grom Care by Motorhelmets.