B1803–DRIVER DOOR LOCK/UNLOCK SWITCH CIRCUIT STUCK LOCK – DRIVER DOOR MODULE | JEEP Grand Cherokee 3G 2007 DIY Repair Guide

B1803–DRIVER DOOR LOCK/UNLOCK SWITCH CIRCUIT STUCK LOCK – DRIVER DOOR MODULE

For a complete wiring diagram Refer to Section 8W.

When Monitored:
Continuously
Set Condition:
When the Driver Door Lock Switch Mux circuit is between 2.0 volts and 3.0 volts for over 30 seconds, this code will set.

Possible Causes

(G161) (LHD) LEFT DOOR LOCK SWITCH MUX WIRE PARTIAL SHORT TO GROUND

(G160) (RHD) RIGHT DOOR LOCK SWITCH MUX WIRE PARTIAL SHORT TO GROUND

(P439) MEMORY SELECT SWITCH MUX WIRE PARTIAL SHORT TO GROUND

(P439) MEMORY SELECT SWITCH MUX CIRCUIT SHORTED TO THE (G920) MEMORY SELECT SWITCH RETURN CIRCUIT

MEMORY SELECTOR SWITCH

DRIVER WINDOW/DOOR LOCK SWITCH

DRIVER DOOR MODULE

Theory of Operation

If this vehicle is equipped with the Memory System, the supply circuit for the Memory Mirrors are supplied by the Driver Door Module. Therefore, both the Memory Select Switch Mux or the Door Lock Switch Mux circuits can cause this DTC to set.

Diagnostic Test

1.TEST FOR INTERMITTENT CONDITION

Does the scan tool display B1803–DRIVER DOOR LOCK/UNLOCK SWITCH CIRCUIT STUCK LOCK?

Yes

Go To 2

The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

2.DRIVER DOOR LOCK SWITCH SHORTED TO GROUND

Does the scan tool display DRIVER DOOR LOCK/UNLOCK SWITCH CIRCUIT STUCK LOCK?

No

Replace the Driver Window/Door Lock Switch.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

Yes

Go to 3

3.(G161/LHD) OR (G160/RHD) DOOR LOCK SWITCH MUX WIRE SHORT TO GROUND

Is the resistance below 10000.0 ohms?

Yes

Repair the (G161/LHD) or (G160/RHD) Door Lock Switch Mux circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

Go to 4

4.VEHICLE EQUIPPED WITH MEMORY SYSTEM?

Is this vehicle equipped with the Memory System?

No

Replace the Driver Door Module in accordance with service information.
Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

Yes

Go to 5

5.(P439) MEMORY SELECT MUX WIRE SHORT TO GROUND

Is the resistance below 10000.0 ohms?

Yes

Repair the (P439) Memory Select Switch Mux wire for a short to ground.
Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

Go to 6

6.(P439) MEMORY SELECT SWITCH MUX CIRCUIT SHORTED

Is the resistance below 10000.0 ohms?

Yes

Go to 7

Replace the Driver Door Module in accordance with service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

7.MEMORY SELECTOR SWITCH SHORTED

Is the resistance below 10000.0 ohms?

Yes

Repair the (P439) Memory Select Switch Mux circuit for a short to the (G920) Memory Select Switch Return circuit.
Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

Replace the Memory Selector Switch.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)