Mazda 3 Workshop Manual page 298

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• Access ECT, TP and MAF PIDs using the
WDS or equivalent.
• Warm up the engine until ECT PID is above
70 °C {158 °F}
• Drive the vehicle.
• Read TP PID while MAF PID is above 32.0
g/s {4.2 lb/min.}.
• Is TP PID above 12.5%?
VERIFY TP PID
• Start the engine.
• Access TP, MAF and RPM PIDs using the
5 WDS or equivalent.
• Read TP PID while MAF PID is below 5 g/s
{0.7 lb/min} and RPM PID is above 500 rpm.
• Is TP PID above 50%?
VERIFY CURRENT INPUT SIGNAL STATUS:
IS CONCERN INTERMITTENT OR
CONSTANT?
6
• Drive the vehicle and read MAF PID.
• Does MAF PID change according to driving
condition?
INSPECT TP SENSOR TERMINALS FOR
ELECTRICAL CORROSION
• Turn the ignition switch off.
• Disconnect the TP sensor connector.
7
• Inspect male and female the TP sensor
terminals for electrical corrosion.
• Is any electrical corrosion found?
VERIFY TP SENSOR
8
• Does the TP sensor resistance smoothly
change while gradually opening throttle valve?
INSPECT PCM TERMINALS FOR
ELECTRICAL CORROSION
• Disconnect the PCM connector.
9
• Inspect the PCM male and female terminals
for electrical corrosion on.
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Yes Go to Step 12.
No Go to the next step.
Intermittent concern exists. Go to
Yes INTERMITTENT CONCERNS
troubleshooting procedure.
Inspect the mass airflow sensor, elated
circuits and terminals.
(See MASS AIR FLOW (MAF) SENSOR
No
INSPECTION [LF].)
Repair or replace if necessary, then go to
Step 16.
Repair or replace the terminal or TP sensor,
Yes
then go to Step 11.
No Go to the next step.
Yes Go to the next step.
No Replace the TP sensor, then go to Step 11.
Yes Repair the terminal, then go to Step 11.
No Go to the next step.
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