Start Authorisation Denied

The access and engine-control sides did not agree that the start request was legitimate. The starter may not be commanded at all, or the engine may crank with operation inhibited.

Documented repairs

MINI Cooper S CAS Replacement: Immobiliser, DME and ISN

2010 MINI Cooper S (R56, N18 1.6L Turbo)

Advanced case study on CAS immobiliser replacement for a 2010 MINI Cooper S (R56) — why the DME and ISN matter, and why a used CAS is never plug-and-play.

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Components

• CAS3 Module

Engines

• N18 1.6L Turbo

Models

• R56 MINI Cooper S

Repairs by System

• Electrical
• Programming
• DME
• Immobiliser
• Starting Problems

Procedures

• Fault Code Scan
• Immobiliser Status Scan
• Key Programming
• Battery Test
• CAS Data Read
• CAS Data Write-Back