Circuit Description
The RH Front Power Door Lock Switch provides a RH Front seat occupant with the ability to initiate an unlock all doors signal.
Whenever the Power Door Lock Switch is moved to the unlock position, a ground is provided on the RH Front Door Module, Connector C1, terminal 1 input, through CKT 245 (DK BLU).
The Power Door Lock Switch ground is provided from the RH Front Door Module via CKT 451 (BLK/WHT). If CKT 451 (BLK/WHT) is open the RH Front power window will also exhibit problems, since both the Power Door Lock Switch and the Power Window Switch share a common ground.
Module power is furnished through CKT 740 (ORN). If CKT 740 (ORN) is open or shorted to ground, the RH Front power window will also exhibit problems.
When this Power Door Lock Switch is placed in the unlock position, the unlock signal is sensed by the RFDM, which then sends a message to the LFDM over the SBI. The LFDM sends this message to the Rear Interface Module (RIM), requesting a command to unlock all doors, since the RIM is the door lock master. Any problem with the SBI or LFDM will affect all door lock, window, and mirror functions.
Conditions for Setting the DTC
If the unlock signal to the RH Front Door Module remains grounded for a period of 30 seconds, this DTC will be set current. The unlock signal from CKT 245 (DK BLU) is examined by the RH Front Door Module no less than once every 300 milliseconds.
The diagnostic for this DTC will not run if either the Battery Voltage High (DTC B1982) or Battery Voltage Low (DTC B1983) are set current.
Action Taken When the DTC Sets
This DTC is dynamic, and as such, is current only while the problem is present. This switch actuation will be ignored by the RFDM until a switch change of state is detected.
Conditions for Clearing the DTC
| • | This DTC will be set from current to history when the UNLOCK input cycles off or the power mode changes from OFF to RUN. |
| • | The history DTC will clear after 50 ignition cycles. |
| • | The scan tool or the vehicle "On Board Diagnostic System" can be used to clear the history DTC. |
Diagnostic Aids
| • | A history DTC is evidence of a intermittent problem, clear the DTC and cycle the ignition switch from OFF to RUN. Then perform the Diagnostic System Check. |
| • | If DTC B2223 is current, cycle the ignition switch from OFF to RUN. If this DTC is still current, perform the following diagnostic. |
Test Description
Numbers below refer to the Diagnostic Table Step Number(s).
-
This step tests the RH front power door switch for an internal short.
-
This repair procedure requires the repair CKT 245 for a short to ground.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Power Door System Diagnostic System Check performed? | -- | Go to Step 2 | |
Is the resistance within the specified range? | 0-5 ohms | Go to Step 3 | Go to Step 4 | |
3 | Replace the RH front power door lock switch. Refer to Door Lock Switch Replacement . Did you complete the repair? | -- | -- | |
4 |
Does the voltage measure within the specified range? | 10-15 V | Go to Diagnostic Aids | Go to Step 5 |
5 |
Is the resistance within the specified range? | 0-5 ohms | Go to Step 6 | Go to Step 7 |
6 | Repair CKT 245 for a short to ground. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 8 | -- |
7 | Replace the RH Front Door Module (RFDM). Refer to Door Control Module Replacement . Did you complete the replacement? | -- | Go to Step 8 | -- |
8 |
Are all DTCs cleared? | -- | Go to Power Door Locks System Check . | -- |
