Mazda 3 Workshop Manual page 427

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• Verify related service repair information
availability.
• Is any related repair information available?
INSPECT CONNECTION OF BARO
SENSOR CONNECTOR
• Turn the ignition switch to off.
3
• Verify that BARO sensor connector is
connected securely.
• Is connection normal?
INSPECT BARO SENSOR CONNECTOR
FOR POOR CONNECTION
• Disconnect the BARO sensor connector.
4
• Inspect for poor connection
(damaged/pulled-out pins, corrosion, etc.).
• Is there malfunction?
INSPECT BARO SENSOR MALFUNCTION
• Perform BARO sensor inspection.
5
(See BAROMETRIC PRESSURE (BARO)
SENSOR INSPECTION
• Is BARO sensor normal?
INSPECT POWER SUPPLY CIRCUIT
VOLTAGE AT BARO SENSOR
CONNECTOR
Note
• If DTCs P0107 and P0122 are also
6
retrieved with P2228, go to
REFERENCE VOLTAGE
troubleshooting procedure.
• Measure voltage between BARO sensor
terminal C (harness-side) and body ground.
• Is voltage within 4.5-5.5 V?
INSPECT BARO SENSOR SIGNAL
CIRCUIT FOR SHORT TO GROUND
• Turn the ignition switch to off.
• Disconnect PCM connector.
7
• Inspect for continuity between BARO
sensor terminal B (harness-side) and body
ground.
• Is there continuity?
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• If the vehicle is not repaired, go to the next
step.
No Go to the next step.
Yes Go to the next step.
No Reconnect the connector, then go to Step 9.
Repair or replace suspected terminal, then go
Yes
to Step 8.
No Go to the next step.
Yes Go to the next step.
No Replace BARO sensor, then go to Step 9.
Yes Go to the next step.
Inspect for open circuit between PCM
terminal 1AE (harness-side) and BARO
sensor terminal C (harness-side).
No
Repair or replace suspected harness, then go
to Step 9.
Repair or replace suspected harness, then go
Yes
to Step 9.
No Go to the next step.
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