AutoCodes – Generic – B1622

B1622 Code - Wiper Rear Low Limit Input Circuit Short To Ground

Quick Answer

The Body Control Module (BCM) monitors the Wiper Rear Low Limit. Common causes include Faulty Wiper Rear Switch, Wiper Rear Switch harness is open or shorted, Wiper Rear 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: B1622 indicates Wiper Rear Low Limit Input Circuit Short To Ground.
Common causes: Common causes include Faulty Wiper Rear Switch, Wiper Rear Switch harness is open or shorted, Wiper Rear 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 6,650

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 May 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1622 Description

The Body Control Module (BCM) monitors the Wiper Rear Low Limit. The BCM sets the OBDII code when the Wiper Rear Low Limit is not to factory specifications.

OBDII Code B1622 - Wiper Rear Low Limit Input Circuit Short To Ground - AutoCodes.com — B1622 Code - Wiper Rear Low Limit Input Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC B1622?

Faulty Wiper Rear Switch
Wiper Rear Switch harness is open or shorted
Wiper Rear Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1622?

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 B1622 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.

Need more information about the B1622 code?

Need more information on how to fix the B1622 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1622 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1622 Lexus — Lost Communication With Side Airbag Sensor Right
B1622 Scion — Lost Communication With Side Airbag Sensor Right
B1622 Toyota — Lost Communication With Side Airbag Sensor Right

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 B1622 Code

What does OBDII code B1622 mean?

OBDII code B1622 refers to a malfunction in the rear wiper low limit input circuit, indicating a short to ground condition.

What symptoms might indicate a B1622 code?

Common symptoms may include the rear wiper not functioning, erratic wiper operation, or the rear wiper not returning to its parked position.

What could cause the B1622 code to trigger?

Possible causes include damaged wiring, a faulty rear wiper motor, a defective wiper switch, or a short circuit in the rear wiper's control circuit.

How can I diagnose B1622 effectively?

To diagnose B1622, start by visually inspecting the wiring and connectors for damage. Use a multimeter to check for continuity and resistance in the circuit.

What should I do if I find a wiring issue causing B1622?

If you find damaged wiring, repair or replace the affected wires or connectors to restore proper circuit function.

Can I fix a faulty rear wiper motor causing B1622 myself?

If you are comfortable with automotive repairs, you can replace the rear wiper motor yourself; otherwise, consider seeking professional help.

What tools do I need to troubleshoot and repair B1622?

Basic tools include a multimeter, wire strippers, a soldering iron (if splicing wires), and a socket set for removing components.

Is it safe to drive with a B1622 code?

While it may not affect overall vehicle safety, a malfunctioning rear wiper can reduce visibility in adverse weather, so itâ€™s best to address the issue promptly.

Will clearing the B1622 code fix the problem?

Clearing the code will not fix the underlying issue; you must address the root cause to ensure the rear wiper operates correctly.

How much might it cost to repair the issue related to B1622?

Repair costs can vary widely depending on the cause; simple wiring repairs may be inexpensive, while replacing a motor could cost more due to parts and labor.