Mazda MX-5 Miata / Grand Touring. Manual - part 137

 

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Mazda MX-5 Miata / Grand Touring. Manual - part 137

 

 

Fig. 13: Identifying Tightening Sequence Of Throttle Body Bolts 
Courtesy of MAZDA MOTORS CORP. 

AIR CLEANER ELEMENT INSPECTION [LF] 

1. Remove the air cleaner element. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [LF] .) 

2. Inspect the following items: 

If there is any abnormality, clean or replace the air cleaner element. 

Has the replacement interval come?  

Is the air cleaner element soiled, damaged, or bent?  

Are the air cleaner case and the air cleaner element correctly sealed?  

Is the correct air cleaner element installed?  

THROTTLE BODY INSPECTION [LF] 

RESISTANCE INSPECTION 

NOTE:

Perform the following inspection only when directed. 

 

2008 Mazda MX-5 Miata Grand Touring 

2008 ENGINE PERFORMANCE Intake Air System - MX-5 Miata

  

1. Remove the battery cover.  

2. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [LF] .)  

3. Disconnect the throttle body connector.  

4. Measure the resistance between throttle actuator terminals A and B. 

If not as specified, replace the throttle body. (See INTAKE-AIR SYSTEM 
REMOVAL/INSTALLATION [LF]
 .)  

If as specified, carry out the Circuit Open/Short Inspection .  

Specification  

AMBIENT TEMPERATURE SPECIFICATION 

Fig. 14: Identifying Throttle Actuator Connector Terminals 
Courtesy of MAZDA MOTORS CORP. 

CIRCUIT OPEN/SHORT INSPECTION 

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [LF] .)  

2. Inspect the following wiring harnesses for open or short (continuity check). 

Ambient temperature (°C {°F})

Resistance (ohm)

Approx. 20 {68}

0.3-100

 

2008 Mazda MX-5 Miata Grand Touring 

2008 ENGINE PERFORMANCE Intake Air System - MX-5 Miata

  

Fig. 15: Identifying Throttle Valve Actuator & PCM Connector Terminals 
Courtesy of MAZDA MOTORS CORP. 

Open Circuit 

If there is no continuity, the circuit is open. Repair or replace the wiring harness. 

Throttle valve actuator terminal A and PCM terminal 2B  

Throttle valve actuator terminal B and PCM terminal 2A  

Short Circuit 

 

2008 Mazda MX-5 Miata Grand Touring 

2008 ENGINE PERFORMANCE Intake Air System - MX-5 Miata

  

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

Throttle valve actuator terminal A and power supply  

Throttle valve actuator terminal A and ground  

Throttle valve actuator terminal B and power supply  

Throttle valve actuator terminal B and ground  

VARIABLE INTAKE AIR SOLENOID VALVE REMOVAL/INSTALLATION [LF] 

1. Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION [LF] .)  

2. Remove the battery cover.  

3. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [LF] .)  

4. Move the variable tumble solenoid valve (AT), slightly out of the way. (See VARIABLE TUMBLE 

SOLENOID VALVE REMOVAL/INSTALLATION [LF].)  

5. Remove in the order indicated in the table. .  

6. Install in the reverse order of removal. 

Fig. 16: Identifying Removal Order Of Variable Intake Air Solenoid Valve (With Torque 

 

2008 Mazda MX-5 Miata Grand Touring 

2008 ENGINE PERFORMANCE Intake Air System - MX-5 Miata

  

 

 

 

 

 

 

 

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