Mazda CX-7 2007 Workshop Manual page 1387

Diagnostic procedure
STEP
1 INSPECT STEERING WHEEL FOR OFF-
CENTER
• Drive the vehicle and inspect the steering
wheel position while driving in a straight line.
• Is the steering wheel off-center?
2 INSPECT STEERING ANGLE SENSOR
POWER SUPPLY CIRCUIT FOR OPEN
• Turn the ignition switch to the ON position.
• Measure the voltage between the steering
angle sensor terminal F and body GND.
• Is the voltage 5 V?
3 INSPECT STEERING ANGLE SENSOR GND
CIRCUIT FOR OPEN
• Turn the ignition switch off.
• Disconnect the steering angle sensor
connector.
• Inspect for continuity between the steering
angle sensor terminal B (wiring harness-
side) and body GND.
• Is there continuity?
4 INSPECT STEERING ANGLE SENSOR
SIGNAL CIRCUIT FOR OPEN
• Disconnect the BCM connector.
• Inspect for continuity between the following
terminals:
— BCM terminal 3Q— steering angle sensor
terminal A (wiring harness-side)
— BCM terminal 3O— steering angle sensor
terminal C (wiring harness-side)
— BCM terminal 3M— steering angle sensor
terminal E (wiring harness-side)
— BCM terminal 3K— steering angle sensor
terminal D (wiring harness-side)
• Is there continuity?
5 INSPECT STEERING ANGLE SENSOR
SIGNAL CIRCUIT FOR SHORT TO GND
• Inspect for continuity between the following
terminals and body GND:
— Steering angle sensor terminal A (wiring
harness-side)
— Steering angle sensor terminal C (wiring
harness-side)
— Steering angle sensor terminal E (wiring
harness-side)
— Steering angle sensor terminal D (wiring
harness-side)
• Is there continuity?
6 INSPECT STEERING ANGLE SENSOR
SIGNAL CIRCUIT FOR SHORT TO POWER
SUPPLY
• Measure voltage between the following and
body GND:
— Steering angle sensor terminal A (wiring
harness-side)
— Steering angle sensor terminal C (wiring
harness-side)
— Steering angle sensor terminal E (wiring
harness-side)
— Steering angle sensor terminal D (wiring
harness-side)
• Is the voltage 1 V or less?
7 INSPECT FOR IMPROPER INSTALLATION
OF STEERING ANGLE SENSOR
• Is the installation normal?
ON-BOARD DIAGNOSTIC [BCM]
INSPECTION
Yes Inspect and adjust the front wheel alignment to correct the
steering wheel alignment, then go to Step 9.
(See 02-11-2 FRONT WHEEL ALIGNMENT.)
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness, then go to Step 9.
Yes Go to the next step.
No Repair or replace the wiring harness, then go to Step 9.
Yes Go to the next step.
No Repair or replace the wiring harness, then go to Step 9.
Yes Repair or replace the wiring harness, then go to Step 9.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness, then go to Step 9.
Yes Go to the next step.
No Repair installation or replace the steering angle sensor, then
go to Step 9.
ACTION
09-02F–25
09-02F