Dtc P0550 [Z6] - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• Inspect the IAC valve.
(See IDLE AIR CONTROL (IAC) VALVE
INSPECTION [Z6].)
• Is there any malfunction?
INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn the ignition switch off.
• Disconnect the PCM connector.
7
• Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
• Is there any malfunction?
INSPECT IAC VALVE CIRCUIT FOR OPEN
CIRCUIT
• Turn the ignition switch off.
• Inspect for continuity between the following
circuits:
- IAC valve terminal A (wiring
8
harness-side) and PCM terminal 2X
(wiring harness-side)
- IAC valve terminal B (wiring
harness-side) and PCM terminal
2AB (wiring harness-side)
• Is there continuity?
VERIFY TROUBLESHOOTING OF DTC
P0511 COMPLETED
• Make sure to reconnect all disconnected
connectors.
9
• Clear the DTC from the PCM memory
using the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR
PROCEDURE".
10
(See AFTER REPAIR PROCEDURE
• Are any DTCs present?
Downloaded from
No Go to the next step.
Yes
No Go to the next step.
Yes Go to the next step.
No
Yes
No Go to the next step.
Yes
[Z6].)
No DTC troubleshooting completed.

DTC P0550 [Z6]

https://carmanualshub.com/
(See IDLE AIR CONTROL (IAC) VALVE
REMOVAL/INSTALLATION
Repair or replace the terminal, then go to Step
9.
Repair or replace the wiring harness for a
possible open circuit, then go to the next step.
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION
Go to the applicable DTC inspection.
(See DTC TABLE [Z6].)
- automotive repair manuals website
[Z6].)
[Z6].)
B3E010200500W06