Mazda 6 2002, Руководство по ремонту

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F–82
ON-BOARD DIAGNOSTIC
3 VERIFY CURRENT INPUT SIGNAL STATUS-IS
CONCERN INTERMITTENT OR CONSTANT
•
Connect WDS or equivalent to DLC-2.
•
Start the engine.
•
Access ECT, TP and MAF PIDs.
•
Warm up the engine until ECT PID is above 80
°
C {176
°
F} .
•
Drive the vehicle.
•
Read MAF PID while TP PID is above 50% .
•
Is MAF PID reading below 4.8 g/s {0.63 lb/
min.} ?
Yes Make sure that throttle position sensor resistance changes
smoothly while gradually opening throttle valve.
•
If not, replace throttle position sensor and go to Step 7.
•
For others, go to next step.
No Go to next step.
4 VERIFY CURRENT INPUT SIGNAL STATUS-IS
CONCERN INTERMITTENT OR CONSTANT
•
Connect WDS or equivalent to DLC-2.
•
Start the engine.
•
Access ECT, MAF and RPM PIDs.
•
Warm up engine until ECT PID is above 80
°
C
{176
°
F} .
•
Read MAF PID while RPM PID is below 1,000
rpm .
•
Is MAF PID reading above 66.5 g/s {8.8 lb/
min.} ?
Yes Go to Step 8.
No Intermittent concern exists. Go to INTERMITTENT
CONCERNS TROUBLESHOOTING procedure.
(See
F–227 INTERMITTENT CONCERN
TROUBLESHOOTING .)
5 INSPECT POOR CONNECTION OF MAF
SENSOR CONNECTOR
•
Turn ignition key to OFF.
•
Disconnect MAF/IAT sensor connector.
•
Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
•
Is there any malfunction?
Yes Repair or replace suspected terminal or MAF/IAT sensor,
then go to Step 7.
No Go to next step.
6 INSPECT POOR CONNECTION OF PCM
CONNECTOR
•
Disconnect PCM connector.
•
Inspect for poor connection (damaged/pulled-
out pins, corrosion, etc.).
•
Is there any malfunction?
Yes Repair terminal, then go to next step.
No Replace MAF/IAT sensor, then go to next step.
7 VERIFY TROUBLESHOOTING OF DTC P0101
COMPLETED
•
Make sure to reconnect all disconnected
connectors.
•
Turn ignition key to ON (Engine OFF).
•
Clear DTC from memory using WDS or
equivalent.
•
Start the engine.
•
Access ECT, TP and RPM PIDs.
•
Warm up the engine until ECT PID is reading
above 80
°
C {176
°
F} .
•
Drive the vehicle while TP PID above 50% for
50 s .
•
Is same DTC present?
Yes Replace PCM, then go to Step 11.
No Go to Step 11.
8 INSPECT MAF SENSOR TERMINALS FOR
ELECTRICAL CORROSION
•
Turn ignition key to OFF.
•
Disconnect MAF/IAT sensor connector.
•
Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
•
Is any problem corrosion found?
Yes Repair or replace suspected terminal or MAF/IAT sensor,
then go to Step 10.
No Go to next step.
9 INSPECT POOR CONNECTION OF PCM
CONNECTOR
•
Disconnect PCM connector.
•
Inspect for poor connection (damaged, pulled-
out pins, corrosion, etc.).
•
Is there any malfunction?
Yes Repair terminal, then go to next step.
No Go to next step.
STEP INSPECTION ACTION