Honda Clarity Clicking Noise and Won’t Start: Clichking Noise, Causes, Fixes, Safety & Full Diagnostics
Complete resource: Definition | Why it happens | Types of clicking | Step-by-step how to fix | Is it safe? | Advantages & Disadvantages | Cost | Expert tips for Clarity PHEV / EV / Fuel Cell
“Clichking… clichking…” — The dreaded repetitive clicking sound when you press START. Your Honda Clarity dashboard flickers, but the READY light never appears. This is the #1 sign of a 12V battery or electrical fault. Read on for every detail.
🔬 Why Does My Honda Clarity Produce Clicking and Not Start? (Deep Dive)
1. Severely Discharged 12V Battery
Voltage below 10.5V while attempting to start; relay can’t hold. Common after leaving lights, parasitic drain, or old age (3-5 years).
2. Corroded / Loose Battery Terminals
High resistance causes voltage drop. Even a good battery fails to deliver current → clicking under load.
3. Faulty Starter Relay or Solenoid
Internal short or welded contacts produce a single loud click. More common in high-mileage Clarity.
4. Bad Ground Connection
Corroded engine ground strap interrupts high current path, mimics dead battery clicking.
Technical insight: The clicking noise is the sound of the starter relay or the main battery relay (in Clarity EV) rapidly engaging and disengaging as voltage drops below the hold-in threshold. Each click represents a failed attempt to close the circuit.
🎯 Types of Clicking Noises (And What Each Means)
| Type | Audible pattern | Root cause in Clarity | Urgency |
|---|---|---|---|
| Rapid-fire clicking (5-10 clicks/sec) | Tak-tak-tak-tak | 12V battery voltage too low (below 10V). Most common issue. | High – Jump-start needed |
| Single heavy click | CLUNK (one time) | Starter motor seized, engine hydrolocked, or internal relay stuck. | Critical – Tow recommended |
| Slow intermittent click | Click … (3 sec) … Click | Loose battery terminal or failing cell internal short. | Moderate – check connections |
| Click from dashboard / under dash | Soft tick-tick | Main PGM-FI relay or body control module relay due to insufficient voltage. | Low – recharge battery |
🛠️ How To Fix “Clicking Noise and Won’t Start” on Honda Clarity – Step by Step
- Step 1 – Safety first: Ensure vehicle in Park, parking brake set. Wear safety glasses.
- Step 2 – Measure battery voltage: Use multimeter. Healthy: 12.4V+. Clicking zone: 9V-11.5V.
- Step 3 – Clean terminals: Disconnect negative first. Use wire brush and baking soda/water solution. Re-tighten firmly.
- Step 4 – Jump start procedure: Connect red clamp to dead battery (+) and donor (+). Black clamp to donor (-) and then to unpainted engine bolt (not dead battery negative). Start donor car, wait 2 min, then try Clarity.
- Step 5 – If jump start works: Battery is weak/dead. Test charging voltage (should be 13.8-14.5V while running). Replace 12V battery if voltage drops overnight.
- Step 6 – Single click troubleshooting: Try tapping starter with insulated tool (if accessible), check engine ground strap, and test starter relay by swapping with same relay (e.g., horn relay).
- Step 7 – For Clarity EV/PHEV: After jump, clear low voltage DTCs using OBD2 scanner. Some models need 12V battery reset: disconnect negative for 10 minutes.
⚠️ Safety warning: Never attempt to jump-start a Honda Clarity if the 12V battery is cracked or leaking. Never exceed 15V. For Clarity Fuel Cell, refer to official towing guidelines.
🧰 Additional “How To” – Advanced Diagnostics & Battery Replacement Cost
How to test parasitic draw: After turning off Clarity, wait 20 min, then connect multimeter in series (amps mode). Normal draw ≤ 50mA. Above 80mA indicates a problem (aftermarket dashcam, faulty relay).
How to choose replacement 12V battery: Honda Clarity typically uses Group 51R (or 140R for some models). Prefer AGM (Absorbent Glass Mat) for better deep-cycle performance. Average cost: $180–$280. Dealer installation: +$100. DIY replacement is safe if you follow polarity.
Estimated total fix cost: Battery $150–250 | Terminal cleaning free | Starter relay $25 | Starter motor $400–700
⚠️ Is It Safe to Drive or Attempt to Start When Clicking Happens?
Short answer: It is not safe to force-start by repeatedly pressing START. This can overheat the starter and damage the relay. But the condition itself does not pose a fire risk in most cases (unless battery is bulging/leaking). It is safe to jump-start if you follow proper polarity and use a 12V source only. Never drive if you hear a single metallic clunk and burning smell — that indicates a seized starter or engine mechanical issue. For Clarity hybrid, avoid push-starting; it may damage the inverter.
✅ Advantages of Early Intervention vs ❌ Disadvantages of Ignoring the Clicking
Advantages (fixing early)
- Prevents being stranded
- Saves starter and relay life
- Less than $200 fix vs major tow
- Preserves ECU memory
Disadvantages of ignoring
- Complete electrical failure
- Potential alternator/DC-DC converter damage
- Random warning lights & errors
- Cost increases (tow, diag)
📊 Comparison: Clicking No Start Across Clarity Models (PHEV, EV, FCV)
| Model | 12V battery location | Specific cause | Special notes |
|---|---|---|---|
| Clarity Plug-in Hybrid | Under hood / or rear cargo | Frequent short EV trips reduce 12V recharge | Use “Battery Tender” if not plugged weekly |
| Clarity Electric (BEV) | Under hood | DC-DC converter failure can mimic clicking | Check HV system; jump start works but fault may remain |
| Clarity Fuel Cell | Trunk area | Similar 12V battery issues | Only certified techs; but clicking same diagnosis |
🧠 Common Myths & Misconceptions About Clicking Noise (Busted)
- Myth 1: “Clicking means my Clarity’s engine is dead.” → False, usually it’s just the 12V battery.
- Myth 2: “I have full high-voltage battery, so the car should start.” → False, the 12V battery is mandatory for relays.
- Myth 3: “A jump start will permanently fix the clicking.” → False, it only addresses symptoms; recharge or replace battery.
- Myth 4: “Clichking noise is different from clicking.” → No, it’s a common misspelling.
🔄 Preventative Maintenance: How to Never Hear That Clicking Again
Frequently Asked Questions (Full Details)
❓ What does “clichking noise” mean exactly on a Honda Clarity?
It’s a typo of “clicking noise” but refers to the same repetitive relay chatter. People searching “clichking” are describing the rapid click sound from the starter or battery relay when the car fails to start.
❓ How do I differentiate between a dead battery and a bad starter?
Dead battery: rapid clicking, interior lights dim, jump start works. Bad starter: single loud click, headlights bright, jump start doesn’t help. Use voltmeter: battery under 10V = battery issue.
❓ Can I replace the Honda Clarity 12V battery myself? How to?
Yes. Locate battery (under hood or rear). Disconnect negative (-) first, then positive (+). Remove clamp. Install new battery, reconnect positive then negative. Some Clarity models require idle learn or window reset after battery change.
❓ Is clicking noise dangerous when driving if the car starts eventually?
If the car starts and then you hear clicking after starting, it could indicate a failing starter staying engaged — that is dangerous (can overheat). Always diagnose immediately.
❓ Why does my Clarity sometimes start and sometimes click?
Intermittent clicking suggests loose battery terminal, a failing battery that holds charge briefly, or a poor ground. Temperature changes also affect battery internal resistance.
❓ How long does a jump start last if the battery is failing?
A jump start may last a few hours to a day if the battery is severely sulfated; if the battery is just discharged, a 30-minute drive may recharge it. But old batteries will fail again soon.
❓ Is there a recall or TSB for Honda Clarity clicking no-start?
Honda issued TSBs regarding 12V battery discharge in Clarity PHEV (Software update for BCM). Check with dealer: TSB 20-045 related to battery drain during storage. Updating software reduces parasitic draw.
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