Mazda 6 2002 Workshop Manual page 179

STEP
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.}?
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.}?
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?
6 INSPECT POOR CONNECTION OF PCM
CONNECTOR
• Disconnect PCM connector.
• Inspect for poor connection (damaged/pulled-
out pins, corrosion, etc.).
• Is there any malfunction?
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?
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?
9 INSPECT POOR CONNECTION OF PCM
CONNECTOR
• Disconnect PCM connector.
• Inspect for poor connection (damaged, pulled-
out pins, corrosion, etc.).
• Is there any malfunction?
F–82
ON-BOARD DIAGNOSTIC
INSPECTION
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 net step.
No Go to net step.
Yes Go to Step 8.
No Intermittent concern eists. Go to INTERMITTENT
CONCERNS TROUBLESHOOTING procedure.
(See F–227 INTERMITTENT CONCERN
TROUBLESHOOTING.)
Yes Repair or replace suspected terminal or MAF/IAT sensor,
then go to Step 7.
No Go to net step.
Yes Repair terminal, then go to net step.
No Replace MAF/IAT sensor, then go to net step.
Yes Replace PCM, then go to Step 11.
No Go to Step 11.
Yes Repair or replace suspected terminal or MAF/IAT sensor,
then go to Step 10.
No Go to net step.
Yes Repair terminal, then go to net step.
No Go to net step.
ACTION