Mazda 6 2002, Workshop Manual

Page: 257 / 1248

F–128
ON-BOARD DIAGNOSTIC
End Of Sie
DTC P0328
A6E397001085W04
6 INSPECT FOR SHORT CIRCUITS
•
Inspect continuity between knock sensor
female terminals A and B (harness-side).
•
Is there continuity?
Yes Repair or replace suspected harness, then go to Step 8.
No Go to next step.
7 INSPECT PCM CONNECTOR TERMINAL
•
Turn ignition key to OFF.
•
Disconnect PCM connector.
•
Inspect for poor connection at terminals 2P and
2S (damaged, pulled-out pins, corrosion, etc.).
•
Is there any malfunction?
Yes Repair terminal, then go to Step 8.
No Go to next step.
8 VERIFY TROUBLESHOOTING OF DTC P0327
COMPLETED
•
Make sure to reconnect all disconnected
connectors.
•
Clear DTC from memory using WDS or
equivalent.
•
Perform KOEO/KOER self-test.
(See
F–66 KOEO/KOER SELF-TEST .)
•
Is same DTC present?
Yes Replace PCM, then go to next step.
(See F–43 PCM REMOVAL/INSTALLATION .)
No Go to next step.
9 VERIFY AFTER REPAIR PROCEDURE
•
Perform “After Repair Procedure”.
(See
F–66 AFTER REPAIR PROCEDURE .)
•
Is there any DTC present?
Yes Go to applicable DTC troubleshooting.
(See F–67 DTC TABLE .)
No Troubleshooting completed.
STEP INSPECTION ACTION
DTC P0328 Knock sensor circuit high input
DETECTION
CONDITION
•
PCM monitors input signal from knock sensor when engine is running. If input voltage at PCM terminals
between 2P and 2S is
above 4.9 V , PCM determines that knock sensor circuit has a malfunction.
Diagnostic support note
•
This is a continuous monitor (CCM).
•
MIL illuminates if PCM detects the above malfunction conditions during first drive cycle.
•
PENDING CODE is available if PCM detects the above malfunction condition.
•
FREEZE FRAME DATA is available.
•
DTC is stored in PCM memory.
POSSIBLE
CAUSE
•
Knock sensor malfunction
•
Connector or terminal malfunction
•
Short to power circuit in wiring between knock sensor terminal A and PCM terminal 2S
•
Short to power circuit in wiring between knock sensor terminal B and PCM terminal 2P