AutoCodes – Mercury – B1353 Mercury

B1353 Mercury Code - Ignition Key-In Circuit Open

Quick Answer

The Instrument Cluster (IC) receives the key-in-ignition warning status from the Smart Junction Box (SJB) over the Medium Speed Controller Area Network (MS-CAN). Common causes include Faulty Ignition Key-In Switch (Part of the ignition switch), Ignition Key-In Switch harness is open or shorted, Ignition Key-In Switch 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: B1353 Mercury indicates Ignition Key-In Circuit Open.
Common causes: Common causes include Faulty Ignition Key-In Switch (Part of the ignition switch), Ignition Key-In Switch harness is open or shorted, Ignition Key-In Switch 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.

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Code Popularity 770

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 15, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1353 Mercury Description

The Instrument Cluster (IC) receives the key-in-ignition warning status from the Smart Junction Box (SJB) over the Medium Speed Controller Area Network (MS-CAN). The key-in-ignition warning switch (part of the ignition switch) is hardwired to the SJB through the circuit. When the key is inserted into the ignition lock cylinder, the key-in-ignition switch closes and supplies voltage to the SJB. The SJB monitors the door ajar input from the LH front door and the key-in-ignition switch status. When the key is inserted into the ignition lock cylinder and the LH front door is open or ajar, the SJB sends the IC a chime request message to sound the key-in-ignition warning chime. The headlamps on warning chime sound when the driver door is opened with the ignition switch in the OFF position, the key is not in the ignition lock cylinder, and the headlamp switch is in the PARK or HEADLAMP ON position.

OBDII Code B1353 Mercury - Ignition Key-In Circuit Open - AutoCodes.com — B1353 Mercury Code - Ignition Key-In Circuit Open

What does this mean?

What are the Possible Causes of the DTC B1353 Mercury?

Faulty Ignition Key-In Switch (Part of the ignition switch)
Ignition Key-In Switch harness is open or shorted
Ignition Key-In Switch circuit poor electrical connection
Faulty Smart Junction Box (SJB)

How to Fix the DTC B1353 Mercury?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1353 Mercury 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1353 Mercury Code

1. What does the OBDII code B1353 mean on a Mercury?

The B1353 code indicates an open circuit in the ignition key-in switch, which is part of the vehicle's ignition system.

2. What are the symptoms of the B1353 code on a Mercury?

Symptoms may include the key chime not sounding when the key is in the ignition, failure of certain electronic functions, or the vehicle not recognizing the key-in status.

3. What causes the B1353 code to appear on a Mercury?

Common causes include a faulty ignition key-in switch, damaged wiring, or a poor electrical connection in the ignition circuit.

4. How do I diagnose the B1353 code on a Mercury?

Start by inspecting the ignition key-in switch, checking for damaged or frayed wiring, and testing for continuity in the circuit using a multimeter.

5. Can I still drive my Mercury with the B1353 code active?

Yes, the vehicle may still be drivable, but certain functions like key chime alerts or other ignition-related features may not work properly.

6. How can I fix the B1353 code on a Mercury?

Repairs may include replacing the ignition key-in switch, repairing or replacing damaged wiring, or cleaning and securing poor electrical connections.

7. What tools do I need to repair the B1353 code on a Mercury?

You may need a multimeter, basic hand tools, electrical tape, and potentially a replacement ignition key-in switch.

8. How much does it cost to fix the B1353 code on a Mercury?

Repair costs vary but typically range from $50 to $200, depending on whether you replace the ignition key-in switch or repair the wiring.

9. Can a dead battery cause the B1353 code on a Mercury?

No, a dead battery is not a typical cause of this code, as it specifically relates to an open circuit in the ignition key-in switch.

10. Do I need a professional mechanic to fix the B1353 code on a Mercury?

If you're comfortable with basic electrical diagnostics and repairs, you can attempt to fix it yourself. Otherwise, a professional mechanic can ensure the issue is resolved correctly.