Mazda CX-7 2007 Workshop Manual page 1388

STEP
8 INSPECT STEERING ANGLE SENSOR
• Inspect the steering angle sensor.
(See 09-40-8 STEERING ANGLE SENSOR
INITIALIZATION PROCEDURE.)
• Is the steering angle sensor normal?
9 VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the BCM memory using
the M-MDS.
• Start the engine and drive the vehicle at 10
km/h {6.2 mph} or more.
• Is the same DTC present?
End Of Sie
DTC C1937[BCM]
DTC C1937 Steering wheel angle sensor offset failure
DETECTION BCM lost steering angle initialization position
CONDITION
• Steering wheel is operated suddenly during sleep control
POSSIBLE
• Steering angle sensor malfunction
CAUSE
• BCM malfunction
Diagnostic procedure
STEP
1 PERFORM STEERING ANGLE SENSOR
INITIALIZATION
• Perform steering angle sensor initialization.
(See 09-40-8 STEERING ANGLE SENSOR
INITIALIZATION PROCEDURE.)
• TCS OFF light and DSC/TCS indicator light
go out?
2 VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the BCM memory using
the M-MDS.
• Turn the ignition switch to LOCK position
then ON position.
• Is the same DTC present?
End Of Sie
BCM SELF-TEST[BCM]
1. Connect the M-MDS to the DLC-2.
2. Set up the M-MDS (including the vehicle
recognition).
3. Verify the following vehicle conditions:
• All the switches are turned off (except the
ignition switch).
• All the doors, hood, and liftgate are closed.
• All the doors, and liftgate are unlocked.
• Parking brake lever is pulled.
4. Start the engine.
Note
• If the engine is not running, the BCM
determines that the oil pressure switch
malfunction.
5. Perform procedures according to directions on the M-MDS screen.
6. Verify if any DTCs are displayed.
• If any DTCs are displayed, perform the troubleshooting according to the corresponding DTC inspection.
7. Disconnect the M-MDS.
End Of Sie
09-02F–26
ON-BOARD DIAGNOSTIC [BCM]
INSPECTION
INSPECTION
Yes Go to the next step.
No Replace the steering angle sensor, then go to Step 9.
Yes Replace the BCM.
(See 09-40-1 BODY CONTROL MODULE (BCM)
REMOVAL/INSTALLATION.)
No DTC troubleshooting completed.
Yes Inspect the steering angle sensor and related wiring
harness.
• Repair ore replace if necessary.
Go to the next step.
No Go to the next step.
Yes Replace the BCM.
(See 09-40-1 BODY CONTROL MODULE (BCM)
REMOVAL/INSTALLATION.)
No DTC troubleshooting completed.
DLC-2
ACTION
id0902f5839300
ACTION
id0902f5830600
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