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Mazda CX-9 Grand Touring. Manual - part 208

VOLTAGE SENSOR SPECIFICATION CHART

PCM CONFIGURATION [MZI-3.7]

1. Connect the M-MDS to DLC-2.

2. After the vehicle is identified, select the following items from the initialization screen of the M-MDS.



When using the IDS (laptop PC)

1. Select the "Module Programming".

3. Then, select the "Programmable Module Installation", "PCM" from the screen menu.

4. Select "PCM" and perform procedures according to directions on the M-MDS screen.

5. Retrieve DTCs by the M-MDS, then verify that there is no DTC present.



If a DTC(s) is detected, perform the applicable DTC inspection. (See DTC TABLE [MZI-3.7] .)

Fig. 8: Identifying DLC-2 Connector
Courtesy of MAZDA MOTORS CORP.

POWER STEERING PRESSURE (PSP) SWITCH INSPECTION [MZI-3.7]

CONTINUITY INSPECTION

1. Disconnect the PSP switch connector.

VCTADVERR2

0.06

-0.43

DEG

Other

Measured/PID Values

Units Measured/PID

KOEO Hot Idle

48 KM/H (30MPH)

89 KM/H (55MPH)

ETCVREF

DCV

VREF

DCV

VPWR

VBAT

DCV

KAPWR

VBAT

DCV

NOTE:



Use the IDS (laptop PC) because the PDS (Pocket PC) does not support
the PCM CONFIGURATION.

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

Page 11

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

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

Page 12



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



PSP switch terminal A and body ground

MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR
REMOVAL/INSTALLATION [MZI-3.7]

1. Disconnect the negative battery cable.

2. Disconnect MAF/IAT sensor connector.

3. Remove the MAF/IAT sensor.

4. Install in the reverse order of removal.

Fig. 10: Identifying MAF/IAT Sensor Connector, Bolts & Torque Specifications
Courtesy of MAZDA MOTORS CORP.

MASS AIR FLOW (MAF) SENSOR INSPECTION [MZI-3.7]

VISUAL INSPECTION

1. Verify the following items of the MAF sensor.



Damage, cracks



Rusted sensor terminal



Bent sensor terminal



If there is any malfunction, replace the MAF sensor. (See MASS AIR FLOW
(MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR
REMOVAL/INSTALLATION [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 .)

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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VOLTAGE INSPECTION

1. Remove the MAF sensor with the connector still connected.

2. Turn the ignition switch to the ON position.

3. Verify that the MAF sensor output voltage (M-MDS monitor item: MAF) changes when wind is

introduced gradually to the sensor part of the MAF sensor.



If it cannot be verified even though the related harnesses have no malfunction, replace the MAF
sensor. (See MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR
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

Fig. 11: Identifying MAF/IAT Sensor And PCM Wiring Harness Side Connector
Courtesy of MAZDA MOTORS CORP.

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [MZI-3.7].

2. Disconnect the MAF/IAT sensor connector.

3. Inspect the following wiring harnesses for open or short. (Continuity inspection)

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

Page 14

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