Engine-Codes - Jaguar - B1921 JAGUAR

B1921 JAGUAR Code - RCM Bracket Ground Resistance High

- Code Popularity: 2,407 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the B1921 JAGUAR Code?

  • Faulty Restraint Control Module (RCM)
  • Restraint Control Module (RCM) harness is open or shorted
  • Restraint Control Module (RCM) circuit poor electrical connection

|How to Fix the B1921 JAGUAR 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 B1921 JAGUAR code?

Labor: 1.0

The cost to diagnose the B1921 JAGUAR 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.

|What are B1921 JAGUAR code possible symptoms?

  • Air Bag Warning Light ON

|What Does the B1921 JAGUAR Code Mean?

The Restraint Control Module (RCM) monitors resistance between ground connections at its housing and reference ground at RCM connector. If RCM detects resistance more than 100 ohms, it stores Diagnostic Trouble Code (DTC) B1921 in memory and flashes on AIR BAG warning light.

RCM Bracket Ground Resistance High

|Need more information with the B1921 JAGUAR code?

Need more information on how to fix the B1921 JAGUAR code?
Get Access to Factory Service Manuals

|Need help with a B1921 JAGUAR code?

Get the b1921 jaguar code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.