P0685 Suzuki Code - Engine Control Module Power Relay Control Circuit Open
Quick Answer
The Engine Control Module (ECM) monitors the power inputs. Common causes include Faulty Engine Control Module (ECM) power relay, ECM power relay harness is open or shorted, ECM power relay circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0685 Suzuki indicates Engine Control Module Power Relay Control Circuit Open.
- Common causes
- Common causes include Faulty Engine Control Module (ECM) power relay, ECM power relay harness is open or shorted, ECM power relay circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0685 Suzuki Description
What are the Possible Causes of the DTC P0685 Suzuki?
- Faulty Engine Control Module (ECM) power relay
- ECM power relay harness is open or shorted
- ECM power relay circuit poor electrical connection
- Blown ECM fuse
- Faulty ECM
How to Fix the DTC P0685 Suzuki?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0685 Suzuki code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0685 Suzuki Code
1. What does the OBDII code P0685 mean on a Suzuki?
P0685 indicates an issue with the Engine Control Module (ECM) power relay control circuit being open, meaning the ECM may not be getting the power it needs to function properly.
2. What are the common symptoms of code P0685 in a Suzuki?
Symptoms may include the engine not starting, stalling while driving, poor performance, and the check engine light turning on.
3. What causes the P0685 code on a Suzuki?
Common causes include a faulty ECM power relay, damaged or corroded wiring, a blown fuse, or a malfunctioning ECM.
4. Is it safe to drive a Suzuki with a P0685 code?
It’s not recommended to drive with this code, as it may lead to engine stalling or prevent the car from starting altogether.
5. How do I diagnose the P0685 code on my Suzuki?
Start by inspecting the ECM power relay, wiring, and fuses for damage or corrosion. Use a multimeter to test for continuity and proper voltage in the relay circuit.
6. Can a bad ECM cause the P0685 code to appear?
Yes, a malfunctioning ECM can be a potential cause of the P0685 code if the issue is not related to the relay, wiring, or fuses.
7. What tools are needed to fix a P0685 code on a Suzuki?
Basic tools include a multimeter, a diagnostic scanner, and possibly wiring repair tools, such as connectors or electrical tape.
8. How much does it cost to fix the P0685 code on a Suzuki?
Repairs can range from $50 to $300 depending on whether you need to replace the ECM power relay, repair wiring, or address a more serious ECM issue.
9. Can I fix the P0685 code on my Suzuki myself?
If you’re experienced with electrical systems, you may be able to replace the relay or repair wiring yourself. However, diagnosing and replacing an ECM may require professional help.
10. Will clearing the P0685 code with a scanner solve the problem?
Clearing the code will reset the check engine light, but it won’t fix the underlying issue. The problem must be properly diagnosed and repaired to prevent the code from returning.
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