AutoCodes – Mercury – B1352 Mercury

B1352 Mercury Code - Ignition Key-In Circuit Failure

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: B1352 Mercury indicates Ignition Key-In Circuit Failure.
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 3,113

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 B1352 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 B1352 Mercury - Ignition Key-In Circuit Failure - AutoCodes.com — B1352 Mercury Code - Ignition Key-In Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B1352 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 B1352 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 B1352 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 B1352 Mercury Code

1. What are common symptoms of OBDII code B1352 (Mercury) - Ignition Key-In Circuit Failure?

- Common symptoms include the inability to start the vehicle, intermittent starting issues, and the dashboard indicating the key is not recognized.

2. What can cause the OBDII code B1352 (Mercury) - Ignition Key-In Circuit Failure?

- Possible causes include a faulty ignition key cylinder, damaged wiring in the key-in circuit, a defective ignition switch, or a malfunctioning anti-theft system.

3. How can I diagnose the OBDII code B1352 (Mercury) - Ignition Key-In Circuit Failure?

- Diagnosis involves checking the wiring for any visible damage, testing the ignition key cylinder, inspecting the ignition switch, and scanning the vehicle's computer for fault codes.

4. Can a DIYer repair OBDII code B1352 (Mercury) - Ignition Key-In Circuit Failure?

- DIY repairs are possible if you have experience with automotive electrical systems. However, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

5. What are some repair tips for fixing OBDII code B1352 (Mercury) - Ignition Key-In Circuit Failure?

- Repair tips include checking and repairing any damaged wiring, replacing the ignition key cylinder if necessary, testing and potentially replacing the ignition switch, and resetting the vehicle's anti-theft system.

6. Is it safe to drive with OBDII code B1352 (Mercury) - Ignition Key-In Circuit Failure?

- It is not advisable to drive the vehicle with this code as it may lead to starting issues or complete failure to start the vehicle.

7. How much does it cost to repair OBDII code B1352 (Mercury) - Ignition Key-In Circuit Failure?

- The cost of repair can vary depending on the specific issue causing the code, the labor rates of the repair shop, and the cost of any replacement parts needed.

8. Can resetting the vehicle's computer clear the OBDII code B1352 (Mercury) - Ignition Key-In Circuit Failure?

- Resetting the computer may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return.

9. Will OBDII code B1352 (Mercury) - Ignition Key-In Circuit Failure affect vehicle performance?

- While this code may not directly impact vehicle performance, it can lead to starting issues and inconvenience for the driver.

10. How long does it take to repair OBDII code B1352 (Mercury) - Ignition Key-In Circuit Failure?

- The repair time can vary depending on the complexity of the issue, availability of parts, and the experience of the mechanic. It is best to consult with the repair shop for an estimate.