Circuit Description
The simple bus interface, CKT 217 (LT BLU), provides a communications path from the LH front power window switch to the driver door module (DDM). The DDM contains the following two types of software:
| • | Switch message decoding software |
| • | Simple bus interface diagnostic software |
The software enables the DDM to monitor the state of the LH front power window 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.
DTCs B1982 (battery Voltage High) and 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 it again changes state or the ignition cycles from OFF to RUN.
Conditions for Clearing the MIL/DTC
| • | This DTC will be set from current to history when the window UP input cycles off or when 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 the history DTC. |
Diagnostic Aids
| • | A history DTC is evidence of an 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.
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Perform the Power Door Diagnostic System Check prior to continuing the diagnosis of this DTC.
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This test step checks for other set DTCs.
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This test step verifies the operation of all the power windows.
Step | Action | Value(s) | Yes | No | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Was the power door diagnostic system check performed? | -- | Go to Step 2 | ||||||||||||||||||
In spect 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 LH Front Power Window Switch. Refer to Front Side Door Window Switch Replacement Is the repair complete? | -- | Go to Step 7 | -- | ||||||||||||||||
Turn the ignition switch ON. Press any driver door window switch other than the one with the DTC set. Does that switch operate the window properly? | -- | Go to Step 4 | ||||||||||||||||||
6 | Replace the 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? | -- | -- |
