For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
DEFINITION: Doors do not unlock when the transmission is put into the PARK position
1 | Was the Power Door Locks System Check performed? | -- | Go to Step 2 | Go to Power Door Locks System Check .
2 |

1. Turn the ignition switch to the ON position.
2. Disconnect the stop lamp switch.
3. Use the DMM to measure the voltage between terminal 3 of the stop lamp switch connector and a known good ground.

Is the measured voltage within the specified value?

B+

Go to Step 4

Go to Step 3

3 |

1. Locate an open or a high resistance in circuit X11.
2. Repair the open or the high resistance in circuit X11.

Is the repair complete?

--

Go to Step 11

--

4 |

1. Disconnect the BCM connector C2.
2. Use the DMM to measure the resistance between terminal 4 of the stop lamp switch connector and terminal D11 of the BCM connector C2.

Is the measured resistance within the specified value?

Less than 5 ohms

Go to Step 6

Go to Step 5

5 |

1. Locate an open or a high resistance in circuits FX102, FX750 and/or FX899.
2. Repair the open or the high resistance in circuits FX102, FX750 and/or FX899.

Is the repair complete?

--

Go to Step 11

--

6 |

1. Connect the stop lamp switch.
2. Press the brake pedal so that the stop lamp switch closes.
3. Use the DMM to measure the voltage between terminal D11 of the BCM connector C2 and a known good ground.

Is the measured voltage within the specified value?

B+

Go to Step 8

Go to Step 7

7 | Replace the stop lamp switch. Refer to Stop Lamp Switch Replacement in Hydraulic Brakes. Is the replacement complete? | -- | Go to Step 11 | --
8 |

1. Disconnect the BCM connector C1.
2. Put the transmission into the PARK position.
3. When the transmission is in the PARK position, terminal 9 of the inline connector C205 will not be grounded.
4. Use the DMM to measure the resistance between terminal B01 of the BCM connector C1 and a known good ground.

Is the measured resistance within the specified value?

∞

Go to Step 10

Go to Step 9

9 |

1. Locate a short to ground in circuit B900.
2. Repair the short to ground in circuit B900.
3. Replace the automatic transmission shift lock control switch if circuit B900 is OK.

Is the repair or the replacement complete?

--

Go to Step 11

--

10 | Replace the BCM. Refer to Body Control Module Replacement in Body control System. Is the repair or the replacement complete? | -- | Go to Step 11 | --
11 |

1. Connect all connectors and components that were disconnected.
2. Verify that the doors unlock when the transmission is put into the PARK position.

Do the doors unlock when the transmission is put into the PARK position?

--

System OK

Go to Step 1