Mazda CX-9 Grand Touring 2009 Manual page 835

Fig. 14: Identifying MAF/IAT Sensor Connector And PCM Wiring Harness Side Connector
Courtesy of MAZDA MOTORS CORP.
1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [MZI-3.7].)
2. Inspect the following wiring harnesses for open or short. (Continuity inspection)
Open circuit
If there is no continuity, the circuit is open. Repair or replace the wiring harness.
MAF/IAT sensor terminal B and body ground
MAF/IAT sensor terminal F and PCM terminal 1AF
Short circuit
If there is continuity, the circuit is shorted. Repair or replace the wiring harness.
MAF/IAT sensor terminal B and power supply
MAF/IAT sensor terminal F and body ground
MAF/IAT sensor terminal F and power supply
THROTTLE POSITION (TP) SENSOR INSPECTION [MZI-3.7]
2008 Mazda CX-9 Grand Touring
2008 ENGINE Control System (MZI-3.7) - Mazda CX-9