Circuit Description
The simple bus interface (SBI), CKT 217 (LT BLU), provides a communications path from the left front power window switch and the driver door module (DDM). The DDM contains the following 2 types of software:
| • | Switch message decoding software |
| • | SBI diagnostic software |
The software enables the DDM to monitor the state of the power window switch of the power door lock switch.
Conditions for Setting the DTC
DTC B2212 will set any time one of the driver door power window switches is continuously closed in either UP or DOWN positions for a period greater than 15 seconds.
DTC B1982 (battery voltage high) and DTC B1983 (battery voltage low) must not be current or the diagnostic will not run.
Action Taken When the DTC Sets
The switch command will be ignored until the switch command again changes state or the ignition cycles from OFF to RUN.
Conditions for Clearing the MIL/DTC
This DTC will set from current to history when the window up input cycles OFF or the power mode changes from OFF to RUN.
The history DTC will clear after 50 ignition cycles.
Use a scan tool in order to clear a history DTC.
Diagnostic Aids
A history DTC is evidence of a intermittent problem.
If DTC B2212 is current, cycle the ignition switch from OFF to RUN. If this DTC is still current, perform the following diagnostics.
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
-
Perform the Power Door System Check prior to continuing the diagnosis of this DTC.
-
This step tests for other set DTCs.
-
This step tests the operation of all of the power windows.
Step | Action | Value(s) | Yes | No | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Was the Power Door Diagnostic System Check performed? | -- | Go to Step 2 | ||||||||||||||||||
Inspect the scan tool for the following DTCs:
Are all of the above DTCs set? | -- | Go to Step 6 | Go to Step 3 | |||||||||||||||||
Do all of the windows function properly? | -- | Go to Step 5 | Go to Step 6 | |||||||||||||||||
4 | Replace the left front power window switch. Refer to Front Side Door Window Switch Replacement Is the repair complete? | -- | Go to Step 7 | -- | ||||||||||||||||
Does that switch operate the window properly? | -- | Go to Step 4 | ||||||||||||||||||
6 | Replace the driver door module (DDM). Refer to Front Door Module Replacement . Is the repair complete? | -- | Go to Step 7 | -- | ||||||||||||||||
7 |
Turn ON the ignition switch. Are all of the DTCs cleared? | -- | -- |
