Mazda CX-9 Grand Touring. Manual — part 461

TRIM REMOVAL/INSTALLATION .)

4. Remove the bass-box. (BSM control module (LH) only) (Vehicles with Bose®) (See BASS-BOX

REMOVAL/INSTALLATION .)

5. Remove the BSM control module with the connector connected.

6. Measure the BSM control module terminal voltage using the short wiring harness connector in the

position shown in the figure.

Fig. 17: Identifying Trunk End Trim & BSM Control Module Short Wiring Harness Connector
Courtesy of MAZDA MOTORS CORP.

TERMINAL VOLTAGE TABLE (REFERENCE)

NOTE:



The BSM control module connector cannot be connected to a tester
due to its water-resistance processing, therefore the short wiring
harness connector is used for measuring the terminal voltage.



If the terminal voltage is not as indicated in the table, inspect the
short wiring harness connector for continuity. (See CONTINUITY
INSPECTION OF SHORT WIRING HARNESS CONNECTOR.) If the
short wiring harness connector is normal, inspect the parts under
"Inspection items".



If the system does not work properly even though the parts or
related wiring harnesses do not have any malfunction, replace
the BSM control module.

2008 Mazda CX-9 Grand Touring

2008 BODY & ACCESSORIES Instrumentation/Driver Info - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:42:27 AM

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Fig. 18: Identifying BSM Control Module Short Wiring Harness Connector Terminals
Courtesy of MAZDA MOTORS CORP.

VOLTAGE SPECIFICATION

Terminal

Signal

Connected

to

Measurement condition

Voltage (V)/

Continuity

Inspection item (s)

A

BCM GND

Body ground Under any condition

1.0 or less



Related
wiring
harnesses

B

BSM
indicator
light signal

BSM
indicator
light

Ignition switch is in ON
position and BSM indicator
light is illuminated

B+



BSM
indicator
light



Related
wiring
harnesses

BSM indicator light is not
illuminated

1.0 or less

C

-

-

-

-

-

D

(1)

BSM OFF
switch signal

BSM OFF
switch

Ignition
switch at ON

BSM OFF
switch is pressed

1.0 or less



BSM OFF
switch



Related
wiring
harnesses

BSM OFF
switch is not
pressed

B+

D

(2)

-

-

-

-

-

E

-

-

-

-

-

F

CAN_L

-

Because this terminal is for communication,
good/no good judgment by terminal voltage is
not possible.



Related
wiring
harnesses

G

Power
supply

fuse

Ignition switch at ON

B+



fuse



Related
wiring
harnesses

Ignition switch off

1.0 or less

H

CAN_H

-

Because this terminal is for communication,
good/no good judgment by terminal voltage is
not possible.



Related
wiring
harnesses

(1)

BSM control module (RH) only

2008 Mazda CX-9 Grand Touring

2008 BODY & ACCESSORIES Instrumentation/Driver Info - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:42:27 AM

Page 32

© 2005 Mitchell Repair Information Company, LLC.

CONTINUITY INSPECTION OF SHORT WIRING HARNESS CONNECTOR

1. Verify that the continuity between the short wiring harness connector terminals is as indicated in the

table.



If the continuity is not as indicated in the table, replace the short wiring harness connector.

(2)

BSM control module (LH) only

NOTE:



Terminal voltage of both the left and right BSM control modules is
equivalent

2008 Mazda CX-9 Grand Touring

2008 BODY & ACCESSORIES Instrumentation/Driver Info - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:42:27 AM

Page 33

© 2005 Mitchell Repair Information Company, LLC.

Fig. 19: BSM Control Module Short Connector Terminals Continuity Chart
Courtesy of MAZDA MOTORS CORP.

BLIND SPOT MONITORING (BSM) OFF SWITCH REMOVAL/INSTALLATION

1. Disconnect the negative battery cable.

2. Remove the dashboard under cover (LH). (See DASHBOARD UNDER COVER

REMOVAL/INSTALLATION .)

3. Remove the hood release lever. (See HOOD LATCH AND RELEASE LEVER

2008 Mazda CX-9 Grand Touring

2008 BODY & ACCESSORIES Instrumentation/Driver Info - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:42:27 AM

Page 34

© 2005 Mitchell Repair Information Company, LLC.