For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 |

1. Plug the scan tool into the data link connector (DLC).
2. Power up the scan tool.

Does the scan tool power up?

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Go to Step 2

Go to Scan Tool Does Not Communicate with Components

2 |

1. With a scan tool, select Body from the System Selection Menu.
2. Select Body Control Module, and Data.

Does the scan tool communicate with the BCM?

--

Go to Step 3

Go to Step 4

3 |

1. With the scan tool, read the current DTCs.
2. If more than 1 DTC is listed, always select the first DTC listed on the scan tool.

Does the scan tool display any current DTCs?

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Go to Diagnostic Trouble Code (DTC) List/Type

Go Wiring Systems for applicable symptom diagnosis

4 | Attempt to establish communications with other class 2 systems (i.e. the PCM, the IPC). Does the scan tool communicate with other class 2 systems? | -- | Go to Step 5 | Go to Scan Tool Does Not Communicate with Components
5 | Inspect the BFC BATT fuse. Is the BFC BATT fuse open? | -- | Go to Step 11 | Go to Step 6
6 |

1. Turn the ignition switch to the OFF position.
2. Disconnect the PNK BCM (C3) connector and remove the connector combs.
3. With a test lamp, backprobe, in order to prevent damage to the terminals between CKT 1540 (ORN) cavity B1 to ground.

Does the test lamp light?

--

Go to Step 7

Go to Step 12

7 | Connect a test lamp to B+ and backprobe, in order to prevent damage to terminal to the BCM ground CKT 151 (BLK/WHT) cavities A10 of the PNK BCM (C3) connector. Does the test lamp light? | -- | Go to Step 9 | Go to Step 8
8 | Locate and repair the open in CKT 151 (BLK/WHT) between the BCM and ground Is the repair complete? | -- | Go to Step 16 | --
9 | With a DMM measure the resistance of CKT 1807 (PPL) between the PNK BCM connector (C3) cavity B2 and the DLC connector cavity 2 Does the DMM display at or below the specified value? | 5ohms | Go to Step 15 | Go to Step 10
10 | Locate and repair the open CKT 1807 (PPL). Is the repair complete? | -- | Go to Step 16 | --
11 |

1. Locate and repair the short to ground in CKT 1540 (ORN).
2. Replace open BFC BATT fuse.

Is the repair complete?

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Go to Step 16

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12 | With the test lamp, probe both sides of the BFC BATT fuse in the LH IPC junction block. Does the test lamp light on both sides of the fuse. | -- | Go to Step 13 | Go to Step 14
13 | Locate and repair the open CKT 1540 (ORN) between the BCM and the LH IPC junction block. Is the repair complete? | -- | Go to Step 16 | --
14 | Replace the LH IP junction block. Is the repair complete? | -- | Go to Step 16 | --
15 |

1. Replace the BCM. Refer to Body Control Module Replacement .
2. Program the BCM with the proper calibrations. Refer to Body Control Module (BCM) Programming/RPO Configuration .

Is the repair complete?

--

System OK

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16 |

1. Reconnect all the disconnected components.
2. With the scan tool, clear all DTCs.

Are all DTCs cleared?

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System OK

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