Circuit Description
The window position sensors receive a battery voltage reference and a constant ground source. These sensors also provide window position information to the RDM through two signal circuits.
Conditions for Running the DTC
| • | Battery voltage between 9-16 volts |
| • | The window must be active in the up or down direction |
Conditions for Setting the DTC
The DTC will set when any of the following conditions has occurred:
| • | An open, short to ground or battery in the window sensor signal circuits |
| • | The window sensor battery voltage reference circuit is open. |
| • | The window sensor low reference circuit has failed. |
Action Taken When the DTC Sets
| • | The RDM will not allow the window indexing, express down or supervised window functions for the affected window. |
| • | The affected window will start and stall with each up or down switch activation. |
Conditions for Clearing the DTC
| • | When the fault is no longer present, the RDM will keep the DTC current until the window has been relearned and an indexing function has occurred. Then the current DTC will change to a history DTC. |
| • | The RDM will clear the history DTC after 50 fault free ignition cycles. |
| • | A current or history DTC can also be cleared using a scan tool. |
Diagnostic Aids
If both DTCs B1533 and B3992 are set as current, the most likely cause is an open in the window sensor battery voltage reference circuit.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Power Window Schematics Connector End View Reference: Power Door Systems Connector End Views | ||||
1 | Did you perform the Door Systems Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the voltage measure within the specified value? | 9.5-16 V | Go to Step 4 | Go to Step 3 |
3 | Measure the voltage between the sensor battery positive voltage circuit of the harness connector and a good ground. Does the voltage measure within the specified value? | 9.5-16 V | Go to Step 9 | Go to Step 8 |
4 | Measure the voltage between the power window low speed serial data circuit of the harness connector and a good ground. Does the voltage measure within the specified value? | 6-9.5 V | Go to Step 11 | Go to Step 5 |
5 | Was the voltage measured in step 4 greater than the specified value? | 6-9.5 V | Go to Step 7 | Go to Step 6 |
6 | Test the power window low speed serial data circuit of the window sensor for a short to ground, a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 10 |
7 | Test the power window low speed serial data circuit of the window sensor for a short to battery. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 10 |
8 | Test the battery voltage circuit of the window sensor for high resistance, or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 10 |
9 | Test the low reference circuit of the window sensor for a high resistance, an open, or a short to battery. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 10 |
10 | Inspect for poor connections at the harness connector of the roof door module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 12 |
11 | Inspect for poor connections at the harness connector of the appropriate window sensor/motor assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 14 | Go to Step 13 |
12 |
Important: Perform the window reinitialization procedure. Refer to Power Window Reinitialization . Replace the roof door module (RDM). Refer to Folding Top Control Module Replacement in Roofs. Did you complete the replacement? | -- | Go to Step 14 | -- |
13 | Replace the inoperative window sensor/motor assembly. Refer to Door Window Regulator Replacement . Did you complete the replacement? | -- | Go to Step 14 | -- |
14 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
