Engine-Codes - Cadillac - B2234 Cadillac

B2234 Cadillac Code - Mirror Down Switch Fault

- Code Popularity: 402 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC B2234 Cadillac?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Mirror Down Switch
  • Mirror Down Switch harness is open or shorted
  • Mirror Down Switch circuit poor electrical connection
  • Faulty Driver Door Module (DDM)
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How to Fix the DTC B2234 Cadillac?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the B2234 Cadillac code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the B2234 Cadillac Code Mean?

The driver door switch signal circuits provide inputs to the Driver Door Module (DDM) when the mirror switch is activated. These inputs allow the DDM to detect a mirror direction request. The DDM provides both power and ground to the mirror switches. When a mirror switch is activated to the right, left, up or down position, ground is supplied through the mirror switch to the signal circuit, which is pulled low. When the DDM detects low voltage on the signal circuit, it will command the mirror to rotate in the direction selected. The DDM controls passenger mirror functions by sending mirror control messages to the Passenger Door Module (PDM) on the serial data line and the PDM then commands the passenger mirror. The DDM monitors both the driver and passenger mirror switch signal circuits to determine how long a ground has been applied. If the DDM detects that a ground is applied for greater than 20 seconds, a Diagnostic Trouble Code (DTC) is set.

B2234 Cadillac Code - Mirror Down Switch Fault

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