1. Connect the M-MDS to the DLC-2 if you are inspecting sensors or switches.
2. Turn the ignition switch to the ON position (Engine off).
3. Access PIDs for sensor or switch if you are inspecting sensors or switches.
4. If you are inspecting the switch, turn it on manually.
5. Spray water onto the vehicle or run it through a car wash.
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If PID value is unstable or malfunction occurs, repair or replace part if necessary.
Fig. 9: Spraying Water Onto Vehicle
Courtesy of MAZDA MOTORS CORP.
ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZI-3.5]
INPUT SIGNAL SYSTEM INSPECTION PROCEDURE
1. Find an irregular signal. (See
FINDING IRREGULAR SIGNALS
.)
2. Locate source. (See
LOCATING THE SOURCE OF UNUSUAL SIGNALS
.)
3. Repair or replace the malfunctioning part.
4. Confirm that the irregular signal is no longer detected.
FINDING IRREGULAR SIGNALS
While referring to, use the PID/DATA monitor and record function to inspect the input signal system relating to
the problem.
1. Start the engine and idle the vehicle. You can assume that any signals that are out of specification by a
wide margin are irregular.
2. When recreating the problem, any sudden change in monitor input signals that is not intentionally created
by the driver can be determined as irregular.
LOCATING THE SOURCE OF UNUSUAL SIGNALS
NOTE:
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If the engine starts and runs, perform the following steps at idle.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
Microsoft
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