Circuit Description
The LH Rear Power Door Lock Switch provides a LH rear seat occupant with the ability to initiate a lock all doors signal.
Whenever the Power Door Lock Switch is moved to the LOCK position, a ground is provided on the LH Rear Door Module (LRDM), Connector C1, terminal 1 input, through CKT 244 (LT BLU).
The Power Door Lock Switch ground is provided from the LH Rear Door Module via CKT 551 (TAN/WHT). If CKT 551 (TAN/WHT) is open the LH Rear 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 840 (ORN). If CKT 840 (ORN) is open or shorted to ground, the LH Rear power window will also exhibit problems.
When this Power Door Lock Switch is placed in the LOCK position, the lock signal is sensed by the LRDM, which then sends to the LFDM over the SBI. The LFDM sends this message to the Rear Interface Module (RIM), requesting a command to lock all doors, since the RIM is the door lock master. The RIM will check to see is the key is in the ignition and a door is open prior to sending a lock all doors command. Any problem with the SBI or LFDM will affect all door lock and window functions.
Conditions for Setting the DTC
If the LOCK signal to the LH Rear Door Module remains grounded for a period of 30 seconds, this DTC will be set current. The LOCK signal from CKT 244 (LT BLU) is examined by the LRDM 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 LRDM until a switch change of state is detected.
Conditions for Clearing the DTC
| • | This DTC will be set from current to history when the LOCK 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 B2224 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 LH rear power door switch for an internal short.
-
This step tests CKT 244 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 LH rear power door lock switch. Refer to Door Lock Switch Replacement . Did you complete the repair? | -- | Go to Step 8 | -- |
4 |
Does the voltage measure within the specified range? | 10-15 V | Go to Diagnostic Aids | Go to Step 6 |
5 |
Is the resistance within the specified range? | 0-5 ohms | Go to Step 6 | Go to Step 7 |
6 | Repair CKT 244 for a short to ground. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 8 | -- |
7 | Replace the LH rear door module (LRDM). 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 . | -- |
