Did you perform the Charging System Check ?

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Go to Step 2

Go to Charging System Check

Check the battery hydrometer.

Is the green dot visible in the hydrometer?

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Go to Step 7

Go to Step 3

Diagnose the battery hydrometer. Refer to Battery Hydrometer Displays Dark or Yellow Dot .

Is the charging system diagnosis complete?

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Go to Step 17

Go to Step 4

Perform the battery load test. Refer to Battery Not Operating Properly .

Did the battery pass the load test?

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Go to Step 6

Go to Step 5

Replace the battery. Refer to Battery Replacement .

Is the repair complete?

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Go to Step 17

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Check the generator. Refer to Generator Not Operating Properly .

Does the generator operate properly?

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Go to Step 7

Go to Step 16

1. Turn the ignition switch to ON.
2. Start the engine and keep the engine running at fast idle.
3. Disconnect the battery thermistor connector, located near the battery.
4. Using a DMM set to DC volts scale, measure the voltage across the battery terminals.

Is the voltage in the specified range?

13-16V

Go to Step 8

Go to Step 13

1. Turn the ignition switch to OFF.
2. Using a DMM set to DC volts scale, measure the voltage at battery thermistor connector terminal A (body harness side).

Is the measured voltage in the specified range?

10-15V

Go to Step 10

Go to Step 9

1. Check the DIM fuse for an open.
2. If the fuse is open, repair CKT 3340 (ORN) short to ground.
3. If the fuse is OK, repair open or high resistance in CKT 3340 (ORN).

Is the repair complete?

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Go to Step 17

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1. Disconnect the generator connector.
2. Connect a fused jumper from generator harness connector terminal D to ground.
3. Connect a DMM set to ohms scale between the battery thermistor connector terminal B (body harness side) and ground.

Is the measured resistance in the specified range?

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Go to Step 12

Go to Step 11

Repair high resistance or open in CKT 725 (LT BLU).

Is the repair complete?

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Go to Step 17

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1. Check the battery thermistor connector for poor terminal contact.
2. If OK, replace the battery thermistor.

Is the repair complete?

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Go to Step 17

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1. Turn the ignition switch to OFF.
2. Disconnect the powertrain control module (PCM) connector C1.
3. Turn the ignition switch to ON.

Is the charge indicator still on?

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Go to Step 14

Go to Step 15

Service the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Is the repair complete?

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Go to Step 17

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1. Check PCM connector C1 for poor terminal contact.
2. If OK, replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls -- 4.6L.

Is the repair complete?

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Go to Step 17

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Replace the generator. Refer to Generator Replacement .

Is the repair complete?

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Go to Step 17

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Repeat the Charging System Check. Refer to Charging System Check .

Is the system check complete?

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System OK

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