B2318 Code - Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery
Quick Answer
Under normal operation, the exterior mirror control switch receives power and ground from the circuit. Common causes include Faulty Passenger Exterior Mirror, Passenger Exterior Mirror harness is open or shorted, Passenger Exterior Mirror 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
- B2318 indicates Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery.
- Common causes
- Common causes include Faulty Passenger Exterior Mirror, Passenger Exterior Mirror harness is open or shorted, Passenger Exterior Mirror 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 B2318 Description
The memory mirror system uses feedback potentiometers, located in the LH and RH exterior mirrors, in order to track the movement of the LH and RH exterior mirror motors. The DDM supplies the LH and RH exterior mirror feedback potentiometer reference voltage and ground through circuits. The DDM receives feedback from the LH and RH exterior mirror feedback potentiometer through left/right and up/down circuits.
What are the Possible Causes of the DTC B2318?
- Faulty Passenger Exterior Mirror
- Passenger Exterior Mirror harness is open or shorted
- Passenger Exterior Mirror circuit poor electrical connection
- Faulty Passenger Exterior Mirror Control Switch
- Faulty Driver Door Module (DDM)
- Faulty Driver Seat Module (DSM)
How to Fix the DTC B2318?
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 B2318 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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Information for Specific Makes
- B2318 Chrysler — Wiper On/Off Control Circuit High
- B2318 Dodge — Wiper On/Off Control Circuit High
- B2318 Ford — Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery
- B2318 Jeep — Wiper On/Off Control Circuit High
- B2318 Lincoln — Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery
- B2318 Mercury — Mirror Passenger Vertical Feedback Potentiometer Circuit Short To Battery
- B2318 RAM — Wiper On/Off Control Circuit High
Frequently Asked Questions about B2318 Code
1. What does the OBDII code B2318 mean?
B2318 indicates a problem with the passenger side mirror's vertical feedback potentiometer circuit, specifically a short to the battery.
2. What are the symptoms of code B2318?
Symptoms may include the passenger side mirror not adjusting vertically, erratic mirror movement, or the mirror being unresponsive.
3. What causes the B2318 code to be triggered?
Common causes include damaged wiring, a short circuit in the mirror adjustment circuit, a faulty potentiometer, or a defective mirror motor assembly.
4. How can I diagnose the B2318 code?
Start by inspecting the wiring and connectors for damage or corrosion, then test the potentiometer and related circuits for continuity and proper voltage.
5. Can I still drive my vehicle with the B2318 code active?
Yes, but the passenger mirror may not function properly, which could impact visibility and safety while driving.
6. How do I fix the B2318 code?
Repairs may involve replacing damaged wiring, repairing shorted circuits, or replacing the passenger side mirror assembly if the potentiometer or motor is faulty.
7. Is the B2318 code specific to certain vehicle brands?
No, it can appear on any vehicle equipped with power mirrors that use a feedback potentiometer circuit for vertical adjustment.
8. How much does it typically cost to repair the B2318 code?
The repair cost can vary widely but typically ranges from $100 to $300 depending on whether the issue is with the wiring or requires a new mirror assembly.
9. Can a blown fuse cause the B2318 code?
While a blown fuse is not a direct cause, it’s worth checking the fuse for the mirror system as part of the diagnostic process.
10. Will clearing the B2318 code with a scan tool fix the issue?
Clearing the code may temporarily remove it, but the underlying issue must be resolved to prevent the code from returning.
Discuss the causes and fixes for B2318 OBDII Code
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