See IMMOBILIZER SYSTEMS - 626 article in ACCESSORIES & EQUIPMENT for diagnosis and repair.
Home/Mazda/626/Mazda 626 GF (1997-2002)/Repair manual/Testing & Diagnostics/DTC P1621: CODE WORD OR KEY ID NUMBER NOT REGISTERED IN PCM
Contents
Wiring diagrams Section: Testing & Diagnostics- Engine Controls - Basic Diagnostic Procedures: Diagnosis
- Engine Controls - Basic Diagnostic Procedures: Other
- Engine Controls - Self-Diagnostics: Overview
- Engine Controls - Self-Diagnostics: Diagnosis
- Engine Controls - Self-Diagnostics: Maintenance
- Engine Controls - Self-Diagnostics: Component Locations
- Engine Controls - Self-Diagnostics: Other
- DTC P0133 OR P0153: HEATED OXYGEN SENSOR (LOW RESPONSE)
- DTC P0135, P0141, P0147 OR P0155: HEATED OXYGEN SENSOR HEATER
- DTC P0420 OR P0421: CATALYST EFFICIENCY MONITOR & EXHAUST SYSTEMS
- DTC P1501: VEHICLE SPEED SENSOR (VSS)
- DTC P1602: IMMOBILIZER UNIT TO PCM COMMUNICATION
- DTC P1603 OR P1604: CODE WORD OR KEY ID NUMBER NOT REGISTERED IN PCM
- DTC P1621: CODE WORD OR KEY ID NUMBER NOT REGISTERED IN PCM
- DTC P1622: KEY ID NUMBER DOES NOT MATCH
- DTC P1623: CODE WORD OR KEY ID NUMBER READ/WRITE ERROR IN PCM
- DTC P1624: IMMOBILIZER COMMUNICATION COUNTER = 0
- Engine Controls - Trouble Shooting - No Codes: Diagnosis
- Engine Controls - Trouble Shooting - No Codes: NVH
- Engine Controls - Trouble Shooting - No Codes: Other
- Engine Controls - System & Component Testing: Diagnosis
- Engine Controls - System & Component Testing: Maintenance
- Engine Controls - System & Component Testing: Other
- Abbreviations
- Accessory Drive Belts
- Adjustments
- Airbag
- Antenna Systems
- Anti-Lock/traction Control
- Application
- Automatic Trans
- Auxiliary Emission Control Systems
- Axle Shafts
- Basic Trouble Shooting
- Body, Cab Control Systems
- Brakes
- Charging System
- Check Lists
- Clutches Manual & Hydraulic
- Computer Relearn
- Cooling Fan
- Cruise Control Systems
- Diagnostic Connector Locations
- Door Locks & Anti-Theft Systems
- Drive Cycles
- Driveline/axles
- DTC Index
- Electrical Component Locations
- Emission Applications
- Engine
- Engine Controls - Pin Voltage/pid Value Charts
- Engine Performance
- Exterior Lights
- Fuses & Circuit Breakers
- Gauges & Instrument Panels
- General Servicing - All Makes
- Heated Glass/defoggers
- Identification
- Interior/illumination Lights
- Manual HVAC System
- Manual Trans
- Mechanical
- Mechanical - Hydraulic
- Metric Conversions
- Mirrors
- Mode 6
- Obd-Ii Drive Cycles
- Oem General Information
- Pin Voltage Charts
- Removal & Installation
- Restraints
- Seats
- Sensor Range Charts
- Specifications
- Starter
- Steering
- Steering Column
- Steering Column Switches
- Steering Gear
- Sun Roof/t-Top/convertible Top
- Suspension Front
- Suspension Rear
- Testing & Diagnostics
- Theory & Operation
- Timing Belt
- Traction Control Disable
- Transmission
- Warning System
- Wheel Alignment
- Windows
- Wiper/washer Systems
- Wiring System (Data Link Connectors, Pwr Dist., Grnd Dist.)