DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| B18BB | WINDOW CONTROL CIRCUIT LOW |
| B18BB | WINDOW CONTROL CIRCUIT OVERCURRENT |
DIAGNOSTIC CODE INDEX
Scheme 1
Note. The schematic shows just the Left Rear Window Motor circuit. The other Passenger Window Motor circuits are similar.
Diagnostic Test
- 1) TEST FOR INTERMITTENT CONDITION Turn the ignition on. With the scan tool, record and erase DTC's Cycle the ignition switch off for 30 seconds then on. Ensure the Window Lock Out Switch is ON. Operate the Driver Window Switch in all positions several times. Operate each Passenger Window Switch in both directions several times. Wait 30 seconds. With the scan tool, read DTC's. Does the scan tool display B18BB-WINDOW CONTROL CIRCUIT LOW? Yes Go To 2) . No The conditions that caused this code to set are not present at this time. Check for a sticking switch or any window motor that is not operating properly and using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) .
- 2) ISOLATE THE CAUSE Cycle the ignition switch off for 30 seconds then on. Erase the DTC's Turn the lock out switch off. Try each window from the Driver Window Switch and stop if a window quits working. Turn the window lock out switch on and try each window from the passenger switches and stop if a window quits working. If the vehicle is equipped with the power sliding backlite, try it to see if works properly without tripping the driver in the TIPM. Try every possible cause listed above to isolate the cause for the (F30) Ignition Switch Output circuit opening. Did the (F30) Ignition Switch Output circuit open and set the B18BB DTC? Yes If the power windows did not operate at all, disconnect the TIPM C9 connector, turn the ignition off and check for a short to ground in the (F30) circuit from the TIPM. If there is no short to ground, replace the TIPM in accordance with the service information. If the windows worked and then quit when doing the steps above, use the schematics in the wiring section to isolate the problem. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) . No If the DTC set in the first step, there has to be an intermittent short to ground. Retest the system for every possible cause. Perform «BODY VERIFICATION TEST - VER 1»(ref-303801-S12649440912008103100000) .