Circuit Description
The RDM 2 fuse in the rear fuse block supplies battery positive voltage to the roof door module (RDM) at all times. The RDM uses this supply for the control of the header latch motor.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B1518 Battery 2 Voltage
Conditions for Running the DTC
| • | The battery voltage is between 9-16 volts. |
| • | The roof may be active or inactive. |
Conditions for Setting the DTC
The DTC will set when the RDM senses no voltage input from the RDM2 fuse.
Action Taken When the DTC Sets
The RDM cannot control the header latch motor.
Conditions for Clearing the DTC
| • | When the fault is no longer present, the RDM will change the current DTC 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. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Power Window Schematics Connector End View Reference: Power Roof Systems Connector End Views | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the voltage measure within the specified value? | 9.5-16 V | Go to Step 3 | Go to Step 4 |
3 | Inspect for poor connections at the harness connector of the RDM. 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 6 | Go to Step 5 |
4 | Repair the open, short to ground or high resistance in the battery positive voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 6 | -- |
5 | Replace the RDM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 6 | -- |
6 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
