For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Inspect the ignition (IGN) 1 fuse. Is the ignition (IGN) 1 fuse open? | -- | Go to Step 2 | Go to Step 3
2 | Repair the short to ground in CKT 39. Is the repair complete? | -- | Go to Charging System Check | --
3 |

1. Disconnect the generator connector.
2. Turn the ignition switch to the RUN position.
3. Attach a scan tool to the data link connector (DLC).
4. Clear any diagnostic trouble codes (DTCs).
5. Select MISC TESTS, ENG OUTPUTS, and GEN L TERM.
6. Command the generator ON.
7. Measure the voltage from the generator connector terminal B to ground.

Is the voltage equal to the specified value?

5V

Go to Step 4

Go to Step 9

4 | Measure the voltage from the generator battery (Bat) terminal to ground. Is the voltage equal to the specified value? | 9-14V | Go to Step 5 | Go to Step 12
5 |

1. Reconnect the generator connector.
2. Ensure that all of the accessories are OFF.
3. Run the engine at a fast idle.
4. Measure the voltage across the battery.

Is the voltage equal to the specified value?

13-16V

Go to Step 6

Go to Step 8

6 | Load test the generator. Charging System Check Did the generator test OK? | -- | Go to Step 7 | Go to Step 8
7 | Replace the battery. Refer to Battery Replacement. Is the repair complete? | -- | Go to Charging System Check | --
8 |

1. Check for poor connections at the generator.
2. If connections are ok, replace the generator. Refer to Generator Replacement

Is the repair complete?

--

Go to Charging System Check

--

9 | Inspect for a poor connection or an open in CKT 225. Is there a poor connection or an open in CKT 225? | -- | Go to Step 10 | Go to Step 11
10 | Repair the poor connection or the open in CKT 225. Is the repair complete? | -- | Go to Charging System Check | --
11 | Replace the powertrain control module (PCM). Powertrain Control Module Replacement/Programming Is the repair complete? | -- | Go to Charging System Check | --
12 | Repair one of the following conditions:

• | The open in CKT 2

• | The fusible link to the generator battery (Bat) terminal

Is the repair complete?

--

Go to Charging System Check

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