Mazda CX-9 Grand Touring 2009 Manual page 863

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.
CHT sensor terminal A and PCM terminal 2AL
CHT sensor terminal B and PCM terminal 2AN
Short circuit
If there is continuity, the circuit is shorted. Repair or replace the wiring harness.
CHT sensor terminal A and power supply
CHT sensor terminal A and body ground
CHT sensor terminal B and power supply
FUEL TANK PRESSURE SENSOR INSPECTION [MZI-3.7]
VOLTAGE INSPECTION
1. Remove the evaporative hose component. (See FUEL TANK REMOVAL/INSTALLATION [MZI-
3.7] .)
2. Turn the ignition switch to the ON position.
3. Plug one end of the evaporative hose component and verify that the output voltage from the fuel tank
pressure sensor changes when pressure is applied from the other hose end.
If it cannot be verified even though the related harnesses have no malfunction, replace the
evaporative hose component.(See FUEL TANK REMOVAL/INSTALLATION [MZI-3.7] .)
If the monitor item status/specification (reference) is not within the specification, even though the
resistance is within the specification, perform the "Circuit Open/Short Inspection".
CIRCUIT OPEN/SHORT INSPECTION
2008 Mazda CX-9 Grand Touring
2008 ENGINE Control System (MZI-3.7) - Mazda CX-9