Mazda CX-9 Grand Touring 2009 Manual page 830

2. Start the engine.
3. Verify no continuity between the PSP switch terminals while rotating the steering wheel.
If there is continuity, verify that P/S oil pump is normal and replace the PSP switch. (See POWER
STEERING OIL PUMP DISASSEMBLY/ASSEMBLY .)
If the monitor item condition/specification (reference) is not within the specification, even though
there is no malfunction, perform the "Circuit Open/Short Inspection".
CIRCUIT OPEN/SHORT INSPECTION
Fig. 9: Identifying PSP Switch And 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 harness for open or short. (Continuity inspection)
Open circuit
If there is no continuity, the circuit is open. Repair or replace the wiring harness.
PSP switch terminal A and PCM terminal 21
Short circuit
2008 Mazda CX-9 Grand Touring
2008 ENGINE Control System (MZI-3.7) - Mazda CX-9