Mazda 3 - Page 89

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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89
• Warm up the engine until ECT PID is more
than 70 °C {158 °F}
• Drive the vehicle.
• Read the TP PID while MAF PID is more
than 59.5 g/s {7.9 lb/min}.
• Is the TP PID less than 12.5 %?
5
VERIFY TP PID
• Start the engine.
• Access the TP, MAF PIDs using the WDS or
equivalent.
• Read the TP PID while MAF PID is less than
3.3 g/s {0.4 lb/min}.
• Is the TP PID more than 50 %?
Yes
Go to Step 11.
No
Go to the next step.
6
VERIFY CURRENT INPUT SIGNAL STATUS
: IS CONCERN INTERMITTENT OR
CONSTANT?
• Drive the vehicle and read the MAF PID.
• Does the MAF PID change in compliance
with driving condition?
Yes
Intermittent concern exists.
Perform the "INTERMITTENT CONCERNS
TROUBLESHOOTING".
(See INTERMITTENT CONCERN
TROUBLESHOOTING [Z6].)
No
Inspect the MAF sensor and related circuits
and terminals.
(See MASS AIR FLOW (MAF) SENSOR
INSPECTION [Z6].)
Repair or replace as necessary, then go to
Step 14.
7
INSPECT TP SENSOR TERMINAL FOR
ELECTRICAL CORROSION
• Turn the ignition switch off.
• Disconnect the TP sensor connector.
• Inspect for electrical corrosion on TP sensor
terminals.
• Is any electrical corrosion found?
Yes
Repair or replace the terminal, then go to
Step 10.
No
Go to the next step.
8
VERIFY TP SENSOR
• Does TP sensor resistance smoothly change
while gradually opening throttle valve?
Yes
Go to the next step.
No
Replace TP sensor, then go to Step 10.
(See THROTTLE POSITION (TP) SENSOR
REMOVAL/INSTALLATION [Z6].)
9
INSPECT PCM TERMINAL FOR
ELECTRICAL CORROSION
• Disconnect the PCM connector.
Yes
Repair terminal, then go to Step 10.
No
Go to the next step.