Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Inspection and Verification
2006 Lincoln ZephyrSECTION Inspection and Verification
- Verify the customer concern.
- Visually inspect for obvious signs of mechanical or electrical damage.VISUAL INSPECTION CHART
Mechanical Electrical - Binding linkage
- Misaligned door
- Battery junction box (BJB) fuse(s):
- 1 (60A)
- 23 (60A)
- Smart junction box (SJB) fuse 16 (15A)
- Door lock control switch
- Door latch(es)
- Luggage compartment lid latch
- Luggage compartment lid release switch
- Remote keyless entry (RKE) keypad
- RKE transmitter
- Circuitry
- Driver door module (DDM) (if equipped)
- SJB
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
- Check that the program card is correctly installed.
- Check the connections to the vehicle.
- Check the ignition switch position.
- If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
- Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
- CAN circuit fault; all electronic control units no response/not equipped, refer to MODULE COMMUNICATIONS NETWORK .
- No response/not equipped for DDM, go to MULTIFUNCTION ELECTRONIC CONTROL MODULES .
- No response/not equipped for SJB, go to MULTIFUNCTION ELECTRONIC CONTROL MODULES .
- System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out self-test diagnostics for the SJB.
- If the DTCs retrieved are related to the concern, go to the DRIVER DOOR MODULE (DDM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX or SMART JUNCTION BOX (SJB) DIAGNOSTIC TROUBLE CODE (DTC) CHART .
- If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
DRIVER DOOR MODULE (DDM) DIAGNOSTIC TROUBLE CODE (DTC) CHART
| DTC | Description | Source | Action |
|---|---|---|---|
| B2574 | Drivers Door LOCK Switch Short to Ground | DDM | GO to PINPOINT TEST B . |
| B2575 | Drivers Door UNLOCK Switch Short to Ground | DDM | GO to PINPOINT TEST B . |
SMART JUNCTION BOX (SJB) DIAGNOSTIC TROUBLE CODE (DTC) CHART
| DTC | Description | Source | Action |
|---|---|---|---|
| B1138 | Memory Full | SJB | The SJB limit of 4 integrated keys is exceeded. PROGRAM a maximum of 4 integrated keys. REFER to programming keys using diagnostic equipment in ANTI-THEFT - PATS . CLEAR the DTCs. REPEAT the self-test. |
| B1139 | Invalid TIC | SJB | GO to PINPOINT TEST H . |
| B1309 | Power Door Lock Circuit Short to Ground | SJB | For vehicles without memory, GO to PINPOINT TEST A . For vehicles with memory, GO to PINPOINT TEST B . |
| B1341 | Power Door Unlock Circuit Short to Ground | SJB | For vehicles without memory, GO to PINPOINT TEST A . For vehicles with memory, GO to PINPOINT TEST B . |
| B1342 | ECU is Defective | SJB | CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved again, INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC CONTROL MODULES . TEST the system for normal operation. |
| B1554 | Decklid Release Circuit Short to Ground | SJB | GO to PINPOINT TEST C . |
| B1623 | Lamp Keypad Output Circuit Failure | SJB | GO to PINPOINT TEST N . |
| B2276 | Less than 2 Transmitters Programmed | SJB | GO to PINPOINT TEST H . |
| B2425 | Remote Transmitter Out of Synchronization | SJB | GO to PINPOINT TEST L . |
| B2695 | Keypad A Switch Circuit Failure | SJB | GO to PINPOINT TEST G . |
| B2696 | Keypad B Switch Circuit Failure | SJB | GO to PINPOINT TEST G . |
| B2697 | Keypad C Switch Circuit Failure | SJB | GO to PINPOINT TEST G . |
| All other DTCs | - | SJB | REFER to MULTIFUNCTION ELECTRONIC CONTROL MODULES . |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.