Mazda RX8 - Page 379

Diagnostic Procedure
STEP INSPECTION ACTION
Yes
Perform troubleshooting according to the
corresponding DTC inspection.
(See DTC U0073, U1900, U2516 .)
1
VERIFY DTC USING WDS OR
EQUIVALENT
• Are either U1900 or U0073, or both
displayed, by either the keyless control
module or the PCM, or both?
No Go to the next step.
Yes
• Perform procedures for when replacing the
PCM only.
(See IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY
ADDITION AND CLEARING .)
• Go to the next step.
2
VERIFY DTC
• Using the registered key, turn the
ignition switch to the ON position.
• Is the DTC displayed?
 SECURITY LIGHT: 22
 WDS or equivalent:
B2141/P1260
No DTC troubleshooting completed.
Yes
• Replace the keyless control module and
perform procedures for when replacing the
keyless control module only.
(See KEYLESS CONTROL MODULE
REMOVAL/INSTALLATION .)
(See IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY
ADDITION AND CLEARING .)
• Go to the next step.
3
EXAMINE KEYLESS CONTROL
MODULE AND PCM
• Is the DTC displayed again?
 SECURITY LIGHT: 22
 WDS or equivalent:
B2141/P1260
No DTC troubleshooting completed.
Yes
Replace the PCM and perform procedures for
when replacing the PCM only.
(See PCM REMOVAL/INSTALLATION .)
(See IMMOBILIZER SYSTEM COMPONENT
REPLACEMENT/KEY ADDITION AND
CLEARING .)
4
EXAMINE PCM
• Is the DTC displayed again?
 SECURITY LIGHT: 22
 WDS or equivalent:
B2141/P1260
No DTC troubleshooting completed.
(w) RX-8 Body
Page 379