1. Disconnect the fuel level sensor.
2. Turn the ignition switch to the RUN position.
3. Connect one lead of J 33431-C to the fuel level sensor connector, cavity A and the other lead to ground.
4. Adjust the resistance dial to 0 ohms.
5. Slowly move the resistance dial to 90 ohms.

Did the instrument cluster fuel gauge indicate EMPTY and then move until indicating FULL?

0 ohms-90 ohms

Go to Step 2

Go to Step 3

Replace the fuel level sensor. Refer to one of the following procedures in Engine Controls:

Did you complete the repair?

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System OK

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1. Disconnect the J 33431-B signal generator.
2. Disconnect the instrument cluster connector.
3. Use a J 39200 DMM in order to measure the resistance between the instrument cluster connector, cavity 16 and the fuel level sensor connector, cavity A.

Did the resistance measure greater than the specified value?

5.0 ohms

Go to Step 4

Go to Step 5

Repair the high resistance in CKT 30 (PPL) between instrument cluster connector and the fuel level sensor connector.

Did you complete the repair?

--

System OK

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Replace the instrument cluster.

Did you complete the repair?

--

System OK

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1. Ensure that the ignition switch is in the OFF position.
2. Disconnect the vehicle control module (VCM) connector C1.
3. Connect one lead of a J 33431-C Signal Generator to the VCM connector C1, cavity 9 and the other lead to ground.
4. Turn the ignition switch to the RUN position.
5. Place the signal generator controls at 0 ohms and slowly turn the control to 90 ohms while observing the FUEL gauge.

Did the FUEL gauge begin at an EMPTY indication and then gradually move to a FULL indication?

0 ohms-90 ohms

Go to Step 3

Go to Step 2

Replace the instrument cluster.

Did you complete the repair?

--

System OK

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1. Turn the ignition switch to the OFF position.
2. Disconnect the VCM connector C3.
3. Use a J 39200 DMM in order to measure the resistance between cavity 13 and cavity 19 of the VCM connector C3.

Did the resistance measure within the specified values?

40 ohms-250 ohms

Go to Step 7

Go to Step 4

1. Disconnect the fuel pump module. Refer to one of the following procedures in Engine Controls:

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2. Use a J 39200 DMM in order to measure the resistance between cavity A and cavity D of the fuel pump module.

Did the resistance measure within the specified values?

40 ohms-250 ohms

Go to Step 5

Go to Step 6

1. Change the amount of fuel in the fuel tank by adding or removing fuel.
2. Use a J 39200 DMM in order to measure the resistance between cavity A and cavity D of the fuel pump module.
3. Observe the resistance indicated on the J 39200 DMM.

Did the resistance change in relation to the amount of fuel that was added or removed in the fuel tank?

--

System OK

Go to Step 6

Replace the fuel pump module. Refer to the following procedures:

Did you complete the repair?

--

System OK

--

1. Change the amount of fuel in the fuel tank by adding or removing fuel.
2. Use a J 39200 DMM in order to measure the resistance between cavity 13 and cavity 19 of the VCM connector C3.
3. Observe the resistance indicated on the J 39200 DMM.

Did the resistance change in relation to the amount of fuel that was added or removed in the fuel tank?

--

Go to Step 10

Go to Step 6

Inspect CKT 1589 (PPL) and CKT 470 (BLK) for an open or a short to ground.

Did you find a condition?

--

Go to Step 9

Go to Step 10

Repair the open or short to ground in CKT 1589 (PPL) or CKT 470 (BLK) between the fuel pump module and the VCM.

Did you complete the repair?

--

System OK

--

Replace the VCM. Refer to one of the following procedures in Engine Controls:

Did you complete the repair?

--

System OK

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