1985-1988 Volvo 740 Mass Air Flow (MAF) Sensor Maintenance

Step 1

Repair step

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• First, disconnect the battery.
• Always take the negative terminal off first, then the positive terminal.
• General Tip: After disconnecting the battery, let the car sit for about 10 minutes. This will allow any residual energy left in the system to settle and it is good practice for any job you are completing.

Step 2

Repair step

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TOOL USED ON THIS STEP 6-in-1 Screwdriver Referenced by the iFixit guide

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• Unlatch the two clasps, as outlined in the image.
• Loosen the screw on the metal band, using a flathead screwdriver.

Step 3

Repair step

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• Disconnect the electronic sensor from the MAF.
• Press on the 2 latches, pulling the cable away from the sensor.

Step 4

Repair step

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• Disconnect the rubber hose from the MAF.
• Remove the MAF from the air filter housing.

Step 5

Repair step

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• Steps 4-6 are for cleaning only.
• Spray the MAF cleaner along the direction of travel, shown by the arrow on top of the sensor.
• (Mass Air Flow sensor Cleaner)

Step 6

Repair step

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• Clean the electronic coupling with an electronics cleaner.

Step 7

Repair step

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• Inject conducting lubricant into the MAF sensor electronic coupling.

Step 8

Repair step

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TOOL USED ON THIS STEP 6-in-1 Screwdriver Referenced by the iFixit guide

View item

• Reattach the MAF to the air filter housing and the intake hose.
• Tighten the screw on the metal band.
• Latch the clasps on either side of the MAF.

Step 9

Repair step

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• Reattach the electronic cable to the MAF.