Mazda 6. Manual - part 132

F–50

CONTROL SYSTEM

PCM CONFIGURATION

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1. Connect the WDS to DLC-2.
2. Set up the WDS (including the vehicle

recognition.)

3. Select “Module programming.”
4. Select “Programmable module installation.”
5. Select “PCM” and perform procedures according

to directions on the WDS screen.

Note

• If “PCM CONFIGURATION” is successful,

the PCM stores the DTC P0602 and
illuminates the MIL. (System is normal.)
Clear the DTC P0602 using WDS or
equivalent after “PCM CONFIGURATION.”

Note

• MIL goes off after three drive cycles with no failure. (DTCs remain in PCM.)

6. Retrieve DTC’s by the WDS or equivalent, then verify that there in no DTC present.

• If DTC is present, perform applicable DTC inspection.

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INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION

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Resistance Inspection

Note

• Perform the following inspection only when directed.

1. Disconnect MAF/IAT sensor.
2. Measure the resistance between the MAF/IAT

sensor terminals D and E using an ohmmeter.

• If not as specified, replace the MAF/IAT

sensor.

• If the MAF/IAT sensor is okay, but the IAT PID

are out of specification, perform the “Circuit
Open/Short Inspection”.

Specification

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See

F–43 PCM

REMOVAL/INSTALLATION

2. Inspect the following wiring harnesses for open or

short. (Continuity check)

Open circuit

• If there is no continuity, the circuit is open. Repair

or replace the harness.
— MAF/IAT sensor terminal D (harness-side)

and PCM terminal 2E (harness-side)

— MAF/IAT sensor terminal E (harness-side)

and PCM terminal 2H (harness-side)

Short circuit

• If there is continuity, the circuit is shorted. Repair

or replace the harness.
— MAF/IAT sensor terminal E (harness-side) and power supply
— MAF/IAT sensor terminal D (harness-side) and power supply
— MAF/IAT sensor terminal D (harness-side) and body GND

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DLC-2

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Ambient temperature (

°C {°F})

Resistance (kilohm)

–20 {–4}

13.6—18.4

20 {68}

2.21—2.69

60 {140}

0.493—0.667

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CONTROL SYSTEM

F–51

MASS AIR FLOW (MAF) SENSOR INSPECTION

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Voltage Inspection

Note

• Perform the following inspection only when directed.

1. Visually inspect for the following on the MAF sensor.

• Damage

• Cracks

• Terminal bends

• Terminal rust

— If any of the above are found, replace the MAF sensor.
— If the MAF PID value is out of specification, carry out the “Circuit Open/Short Inspection”.

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See

F–43 PCM

REMOVAL/INSTALLATION

2. Disconnect the MAF sensor connector.
3. Inspect the following wiring harnesses for open or

short. (Continuity check)

Open circuit

• If there is no continuity, the circuit is open. Repair

or replace the harness.
— MAF sensor terminal A (harness-side) and

main relay terminal C (harness-side)

— MAF sensor terminal B (harness-side) and

PCM terminal 2AC (harness-side)

— MAF sensor terminal C (harness-side) and

PCM terminal 1P (harness-side)

Short circuit

• If there is continuity, the circuit is shorted. Repair or replace the harness.

— MAF sensor terminal A (harness-side) and body GND
— MAF sensor terminal C (harness-side) and power supply
— MAF sensor terminal C (harness-side) and body GND
— MAF sensor terminal B (harness-side) and power supply

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THROTTLE POSITION (TP) SENSOR INSPECTION

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Note

• Perform the following inspection only when directed.

Resistance Inspection

1. Perform the following test only when directed.

• If as specified but TP PID value is out of specification, inspect resistance of TP sensor.

• If not as specified, inspect the following:

— Accelerator cable free play (See

F–16 ACCELERATOR CABLE INSPECTION/ADJUSTMENT

2. Disconnect the TP sensor connector.
3. Verify that the resistance between TP sensor

terminals A and B changes smoothly while
opened and closed the throttle valve slowly.

• If not verified, replace TP sensor.

4. Measure the resistance between TP sensor

terminals A and C using an ohmmeter.

• If not as specified, replace the TP sensor.

• If as specified, but TP PID value is out of

specification, perform the “Circuit Open/Short
Inspection”.

Specification

3.2—4.8 kilohms

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F–52

CONTROL SYSTEM

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See

F–43 PCM

REMOVAL/INSTALLATION

2. Inspect the following wiring harnesses for open or

short. (Continuity check)

Open circuit

• If there is no continuity, the circuit is open. Repair

or replace the harness.
— TP sensor terminal A (harness-side) and

PCM terminal 2H (harness-side)

— TP sensor terminal B (harness-side) and

PCM terminal 2A (harness-side)

— TP sensor terminal C (harness-side) and

PCM terminal 2K (harness-side)

Short circuit

• If there is continuity, the circuit is shorted. Repair or replace the harness.

— TP sensor terminal C (harness-side) and power supply
— TP sensor terminal C (harness-side) and body GND
— TP sensor terminal B (harness-side) and power supply
— TP sensor terminal B (harness-side) and body GND
— TP sensor terminal A (harness-side) and power supply

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MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION

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Note

• Perform the following inspection only when directed.

• The following vacuum values are indicated by relative pressure from the MAP sensor.

1. Connect the SSTs (WDS or equivalent) to the DLC-2.
2. Turn the ignition switch to ON (Engine OFF).
3. Select MAP PID on the SSTs (WDS or equivalent).
4. Verify that the MAP PID (pressure) and barometric pressure are practically equal.

• If not as verified, perform the “Circuit Open/Short Inspection”.

— If there is no open or short circuit, replace the MAP sensor.

• If as verified, go to next step.

5. Apply vacuum of –25.0 kPa {–187 mmHg, –7.38 inHg} to the MAP sensor, and verify that the MAP variation

from that of Step 4 is approx. 25.0 kPa {187 mmHg, 7.38 inHg}.

• If not as verified, perform the “Circuit Open/Short inspection”.

— If there is no open or short circuit, replace the barometric pressure sensor.

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See

F–43 PCM

REMOVAL/INSTALLATION

2. Inspect the following wiring harness for open or

short. (Continuity check)

Open circuit

• If there is no continuity, the circuit is open. Repair

or replace the harness.
— MAP sensor terminal A (harness-side) and

PCM terminal 2H

— MAP sensor terminal D (harness-side) and

PCM terminal 1J

— MAP sensor terminal C (harness-side) and

PCM terminal 2K

Short circuit

• If there is continuity, the circuit is shorted. Repair or replace the harness.

— MAP sensor terminal C (harness-side) and power supply.
— MAP sensor terminal C (harness-side) and body GND.
— MAP sensor terminal D (harness-side) and power supply.
— MAP sensor terminal D (harness-side) and body GND

End Of Sie

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CONTROL SYSTEM

F–53

ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION

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Warning

• When the engine is hot, it can badly burn. Turn off the engine and wait until it is cool before

removing the ECT sensor.

1. Drain the engine coolant. (See

E–3 COOLING SYSTEM SERVICE WARNINGS

2. Disconnect the ECT sensor connector.
3. Remove the ECT sensor.
4. Install in the reverse order of removal.

Tightening torque

10—14 N·m

{1.02—1.42 kgf·m, 7.38—10.32 ft·lbf}

5. Refill the engine coolant. (See

E–3 COOLING

SYSTEM SERVICE WARNINGS

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ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION

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Note

• Perform the following inspection only when directed.

ECT Sensor Resistance Inspection

1. Drain the engine coolant. (See

E–3 COOLING SYSTEM SERVICE WARNINGS

2. Remove the ECT sensor (located above the starter).
3. Place the ECT sensor in water with a thermometer, and heat the water gradually.
4. Measure the resistance between the ECT sensor terminals A and B using an ohmmeter.

• If not as specified, replace the ECT sensor.

• If the ECT sensor is okay, but ECT PID value is out of specification, perform the “Circuit Open/Short

Inspection”.

Specification

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See

F–43 PCM

REMOVAL/INSTALLATION

2. Inspect the following wiring harnesses for open or

short. (Continuity check)

Open circuit

• If there is no continuity, the circuit is open. Repair

or replace the harness.
— ECT sensor terminal A (harness-side) and

PCM terminal 1M (harness-side)

— ECT sensor terminal B (harness-side) and

PCM terminal 2H (harness-side)

Short circuit

• If there is continuity, the circuit is shorted. Repair

or replace the harness.
— ECT sensor terminal A (harness-side) and power supply
— ECT sensor terminal A (harness-side) and body GND

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Water temperature (

°C {°F})

Resistance (kilohms)

20 {68}

35.48—39.20

70 {158}

5.07—5.60

80 {176}

3.65—4.02

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