Engine-Codes - Cadillac - B3935 Cadillac

B3935 Cadillac Code - Transponder Authentication

- Code Popularity: 1,058 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code B3935 Cadillac?

  • Faulty Key/Transmitter
  • Faulty Body Control Module (BCM)

|How to Fix the B3935 Cadillac Code?

Start by checking 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's pins.

|What is the Cost to Diagnose the Code B3935 Cadillac?

Labor: 1.0

The cost to diagnose the B3935 Cadillac code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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|What are Code B3935 Cadillac Possible Symptoms?

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

|What Does the B3935 Cadillac Code Mean?

When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the key is energized by the exciter coil surrounding the ignition lock cylinder. The transponder transmits a signal to the immobilizer control module. The immobilizer control module translates this signal to a serial data message which is sent to the Body Control Module (BCM). The BCM then compares this value to a value stored in memory. If the value is correct, the BCM will send the prerelease password via the serial data circuit to the Engine Control Module (ECM) If the learned key code does not match or a transponder value is not received, the BCM will send the start disable password to the ECM.

Transponder Authentication

|Need more Information on the B3935 Cadillac Code?

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|Need Help with the B3935 Cadillac Code?

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