B1D4D-MEMORY SWITCH INPUT CIRCUIT STUCK - DDM
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
Continuously
- Set Condition:
If the Driver Door Module either receives a conflicting input from the (P439) Memory Select Switch Mux circuit or the (G160/G161) Right/Left Door Lock Switch Mux circuit or the module senses voltage is less than 0.2 volts on the (P439) Memory Select Switch Mux circuit or the (G160/G161) Right/Left Door Lock Switch Mux circuit.
| Possible Causes |
| (G160) RIGHT DOOR LOCK SWITCH MUX CIRCUIT SHORTED TO GROUND (RHD) |
| (G161) LEFT DOOR LOCK SWITCH MUX CIRCUIT SHORTED TO GROUND (LHD) |
| (G160) RIGHT DOOR LOCK SWITCH MUX CIRCUIT SHORTED TO (Z911) GROUND CIRCUIT (RHD) |
| (G161) LEFT DOOR LOCK SWITCH MUX CIRCUIT SHORTED TO (Z911) GROUND CIRCUIT (LHD) |
| (G160) RIGHT DOOR LOCK SWITCH MUX CIRCUIT SHORTED TO THE (G776) RIGHT DOOR LOCK SWITCH RETURN CIRCUIT (RHD) |
| (G161) LEFT DOOR LOCK SWITCH MUX CIRCUIT SHORTED TO THE (G775) LEFT DOOR LOCK SWITCH RETURN CIRCUIT (LHD) |
| (P439) MEMORY SELECT SWITCH MUX CIRCUIT SHORTED TO GROUND |
| (P439) MEMORY SELECT SWITCH MUX CIRCUIT SHORTED TO THE (G920) MEMORY SELECT SWITCH RETURN CIRCUIT |
| DRIVER WINDOW/DOOR LOCK SWITCH |
| MEMORY SET SWITCH |
| DRIVER DOOR MODULE |
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITIONTurn the ignition on.
With the scan tool, record and erase DTCs.
Press the Memory Set Switch several times in all positions.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read DTCs.
Does the scan tool display: B1D4D MEMORY SWITCH INPUT CIRCUIT STUCK?
Yes
- Go To 2
No
- 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. CHECK THE DRIVER WINDOW/DOOR LOCK SWITCH FOR A SHORT TO GROUND
With the scan tool, erase DTCs.
Turn the ignition off.
Disconnect the Driver Window/Door Lock Switch C2 connector.
Cycle the ignition 3 times.
Turn the ignition on.
With the scan tool, read DTCs.
Does the scan tool display: B1D4D MEMORY SWITCH INPUT CIRCUIT STUCK?
Yes
- Go To 3
No
- Replace the Driver Window/Door Lock Switch in accordance with the Service Information.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
3. CHECK THE MEMORY SET SWITCH FOR A SHORT TO GROUND
With the scan tool, erase DTCs.
Turn the ignition off.
Disconnect the Memory Set Switch connector.
Cycle the ignition 3 times.
Turn the ignition on.
With the scan tool, read DTCs.
Does the scan tool display: B1D4D MEMORY SWITCH INPUT CIRCUIT STUCK?
Yes
- Go To 4
No
- Replace the Memory Set Switch in accordance with the Service Information.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
4. CHECK THE (G160/G161) RIGHT/LEFT DOOR LOCK SWITCH MUX CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
Disconnect the Driver Door Module C2 connector.
Measure the resistance between ground and the (G160/G161) Right/Left Door Lock Switch Mux circuit in the Driver Door Module C2 connector.
Is the resistance below 10000.0 ohms?
Yes
- Repair the (G160/G161) Right/Left 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).
No
- Go to 5
5. CHECK THE (G160/G161) RIGHT/LEFT DOOR LOCK SWITCH MUX CIRCUIT FOR A SHORT TO THE (Z911) GROUND CIRCUIT
Measure the resistance between the (G160/G161) Right/Left Door Lock Switch Mux circuit and the (Z911) Ground circuit in the Driver Door Module C2 connector.
Is the resistance below 10000.0 ohms?
Yes
- Repair the (G160/G161) Right/Left Door Lock Switch Mux circuit for a short to the (Z911) Ground circuit.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Go To 6
6. CHECK THE (G160/G161) RIGHT/LEFT DOOR LOCK SWITCH MUX CIRCUIT FOR A SHORT TO THE (G775/G776) LEFT/RIGHT DOOR LOCK SWITCH RETURN CIRCUIT
Measure the resistance between the (G160/G161) Right/Left Door Lock Switch Mux circuit and the (G775/G776) Left/Right Door Lock Switch Return circuit in the Driver Door Module C2 connector.
Is the resistance below 10000.0 ohms?
Yes
- Repair the (G160/G161) Right/Left Door Lock Switch Mux circuit for a short to the (G775/G776) Left/Right Door Lock Switch Return circuit.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Go To 7
7. CHECK THE (P439) MEMORY SELECT SWITCH MUX CIRCUIT FOR A SHORT TO GROUND
Disconnect the Driver Door Module C3 connector.
Measure the resistance between ground and the (P439) Memory Select Switch Mux circuit in the Driver Door Module C3 connector.
Is the resistance below 10000.0 ohms?
Yes
- Repair the (P439) Memory Select Switch Mux circuit for a short to ground.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Go To 8
8. CHECK THE (P439) MEMORY SELECT SWITCH MUX CIRCUIT FOR A SHORT TO THE (G920) MEMORY SELECT SWITCH RETURN CIRCUIT
Measure the resistance between the (P439) Memory Select Switch Mux circuit and the (G920) Memory Select Switch Return circuit in the Driver Door Module C3 connector.
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 BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Replace the Driver Door Module in accordance with the Service Information.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).