Mazda CX-9 Grand Touring 2009 Manual page 858

Courtesy of MAZDA MOTORS CORP.
NOTE:
4. Install in the reverse order of removal.
KNOCK SENSOR (KS) INSPECTION [MZI-3.7]
NOTE:
Before performing the following inspection, make sure to follow the
procedure as indicated in the troubleshooting flowchart. (See HOW TO
USE THIS MANUAL .)
RESISTANCE INSPECTION
1. Turn the ignition switch to LOCK.
2. Disconnect the KS connector.
3. Measure the resistance between the KS terminals.
KS(RH): KS terminals A and B
KS(LH): KS terminals C and D
If not as specified, replace the KS.
If the KS is normal, but PID value is out of specification, perform the "Circuit Open/Short
Inspection".
KS resistance
4.39-5.35 Mohms
CIRCUIT OPEN/SHORT INSPECTION
2008 Mazda CX-9 Grand Touring
2008 ENGINE Control System (MZI-3.7) - Mazda CX-9
Lubricate the new O-ring with clean engine coolant for installation.