Mazda CX-9 Grand Touring. Manual — part 215

Fig. 35: Putting Tray Under Converter Housing
Courtesy of MAZDA MOTORS CORP.

3. Remove in the order indicated in the table.

Fig. 36: Identifying Water Inlet Pipe, O-Ring, KS Connector & Torque Specifications

2008 Mazda CX-9 Grand Touring

2008 ENGINE Control System (MZI-3.7) - Mazda CX-9

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Courtesy of MAZDA MOTORS CORP.

4. Install in the reverse order of removal.

KNOCK SENSOR (KS) INSPECTION [MZI-3.7]

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

NOTE:



Lubricate the new O-ring with clean engine coolant for installation.

NOTE:



Before performing the following inspection, make sure to follow the
procedure as indicated in the troubleshooting flowchart. (See HOW TO
USE THIS MANUAL .)

2008 Mazda CX-9 Grand Touring

2008 ENGINE Control System (MZI-3.7) - Mazda CX-9

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Sunday, November 15, 2009 10:07:19 AM

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Fig. 37: Identifying KS Wiring Harness Side 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.



KS terminal A and PCM terminal 2Q



KS terminal B and PCM terminal 2M



KS terminal C and PCM terminal 2L



KS terminal D and PCM terminal 2G

Short circuit



If there is continuity, the circuit is shorted. Repair or replace the wiring harness.



KS terminal A and power supply



KS terminal A and body ground



KS terminal B and power supply



KS terminal B and body ground

2008 Mazda CX-9 Grand Touring

2008 ENGINE Control System (MZI-3.7) - Mazda CX-9

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Sunday, November 15, 2009 10:07:19 AM

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

KS terminal C and power supply



KS terminal C and body ground



KS terminal D and power supply



KS terminal D and body ground

CYLINDER HEAD TEMPERATURE (CHT) SENSOR
REMOVAL/INSTALLATION [MZI-3.7]

1. Disconnect the negative battery cable.

2. Remove the following part for easier access.

Perform the following procedure to remove the intake manifold.

1. Remove the ventilation hose. (See QUICK RELEASE CONNECTOR (EMISSION SYSTEM)

REMOVAL/INSTALLATION [MZI-3.7] .)

2. Remove the vacuum hose (to purge solenoid valve). (See QUICK RELEASE CONNECTOR

(EMISSION SYSTEM) REMOVAL/INSTALLATION [MZI-3.7] .)

3. Remove the fuel hose. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION

[MZI-3.7] .)

4. Remove the fuel distributor. (See FUEL INJECTOR REMOVAL/INSTALLATION [MZI-

3.7] .)

3. Remove the intake manifold. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-

3.7] .)

4. Disconnect the CHT sensor connector.

5. Remove the CHT sensor using the following tools.



Socket 3/8", 20 mm, 6 point



Ratchet handle and torque wrench 3/8" Drive

Fig. 38: Identifying CHT Sensor Connector
Courtesy of MAZDA MOTORS CORP.

NOTE:



Do not reuse the CHT sensor, install a new sensor.

2008 Mazda CX-9 Grand Touring

2008 ENGINE Control System (MZI-3.7) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:07:19 AM

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© 2005 Mitchell Repair Information Company, LLC.