Mazda CX-9 Grand Touring 2009 Manual page 824

Fig. 5: Control System Diagram
Courtesy of MAZDA MOTORS CORP.
PCM REMOVAL/INSTALLATION [MZI-3.7]
NOTE:
To replace the PCM, Setup the M-MDS and perform the PCM configuration.
(See PCM CONFIGURATION [MZI-3.7].)
1. Disconnect the negative battery cable.
2. Remove the battery and battery tray. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)
NOTE:
3. Disconnect connectors.
4. Remove PCM and bracket as and assembly.
5. Remove PCM from bracket.
6. When replacing the PCM on the vehicles, perform the following.
PCM parameter reset. (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY
ADDITION AND CLEARING [ADVANCED KEYLESS SYSTEM] .) (See IMMOBILIZER
SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING
[KEYLESS ENTRY SYSTEM] .)
7. Install in the reverse order of removal.
2008 Mazda CX-9 Grand Touring
2008 ENGINE Control System (MZI-3.7) - Mazda CX-9
Only 2 PCM connectors.