NOTE:
In order to perform a forced ignition ON, the M-MDS (IDS) is necessary. If the servicing is being done outside of an Authorized Mazda dealership, contact an Authorized Mazda dealership for instructions.
The forced ignition ON procedure forces a power supply to each part when no power is available even after the ignition switch has been operated. However, the engine cannot be started and the steering cannot be unlocked.
When performing a forced ignition ON procedure, remove all advanced keys from the vehicle. If an advanced key is left in the vehicle, the forced ignition ON procedure cannot be done.
1. Verify that there are no advanced keys in the vehicle.
2. Get PCM part number from As-built site.
3. Connect the M-MDS (IDS) to the DLC-2.

4. Manual vehicle identification.
Select “Manual Vehicle Entry”.
5. Select the “All other” from Vehicle list.
6. Input the PCM part number on the following screen.

7. After the vehicle is identified, select the following items from the initialization screen of the IDS.
Select “Body”.
Select “Special Ignition ON”.
8. Perform the procedure according to the directions on the screen.
9. Delete session with keeping ignition ON.
10. Normal vehicle identification.
Ignition
Ignition Coil Inspection [Mzr 2.0, Mzr 2.5]PCM Configuration [Mzr 2.0, Mzr 2.5]
CAUTION:
If the wheel and tire sizes are changed, a discrepancy with the speedometer
needle whereby it exceeds the allowable range could result in a malfunction.
If the wheel and tire sizes are changed, perform the following procedure to
change the tire size parameter setting..
...
Neutral Switch Removal/Installation [G35 M R]
1. Remove the battery cover..
2. Disconnect the negative battery cable.
3. Remove the battery component. (ex: battery, battery tray and PCM component)(See
BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].)
4. Remove the aerodynamic under cover No.2..
5. Drain the oil from the transaxle..
...
Crankshaft Position (CKP) Sensor Inspection [Mzr 2.0, Mzr 2.5]
Visual Inspection
CAUTION:
When foreign material such as an iron chip is on the CKP sensor, it can cause
abnormal output from the sensor because of flux turbulence and adversely affect
the engine control. Be sure there is no foreign material on the CKP sensor when
replacing.
...