Pinpoint Test F: The Doors Do Not Lock/Unlock Using The Remote Keyless Entry Keypad

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

Test Step

F1 CHECK THE VEHICLE SECURITY MODULE KEYPAD SWITCH PIDS
- Enter the following diagnostic mode on the diagnostic tool: Vehicle Security Module KEYPAD PIDS.
- Press each remote keyless entry (RKE) keypad button while viewing vehicle security module KEYPAD PIDS.
- Do the PID values agree with the RKE keypad button positions?
Result / Action to Take
- Yes : GO to F5.
- No : GO to F2.

F2 CHECK CIRCUITS 121 (YE/BK), 122 (YE), AND 123 (RD) FOR RESISTANCE TO GROUND

Key in OFF position.
Disconnect: Vehicle Security Module C2113c.

Using the following table, measure the resistance between the vehicle security module C2113c harness side and ground:

Vehicle Security Module C2113c	Circuit
pin 2	121 (YE/BK)
pin 3	123 (RD)
pin 9	122 (YE)

Fig 1: Measuring Resistance Between Connector Terminals And Ground

Courtesy of FORD MOTOR CO.

Is any resistance less than 10,000 ohms?

Yes : GO to F3.
No : GO to F4.

F3 CHECK CIRCUITS 121 (YE/BK), 122 (YE), AND 123 (RD) FOR A SHORT TO GROUND

Disconnect: Remote Keyless Entry (RKE) Keypad C500.

Using the following table, measure the resistance between the vehicle security module C2113c harness side and ground:

Vehicle Security Module C2113c	Circuit
pin 2	121 (YE/BK)
pin 3	123 (RD)
pin 9	122 (YE)

Fig 2: Measuring Resistance Between Vehicle Security Module C2113C Harness Side And Ground

Courtesy of FORD MOTOR CO.

Is any resistance less than 10,000 ohms?

Yes : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
No : INSTALL a new RKE keypad. REFER to REMOTE KEYLESS ENTRY KEYPAD in this article. CLEAR the DTCs. REPEAT the self-test.

F4 CHECK CIRCUITS 121 (YE/BK), 122 (YE), 123 (RD), AND 124 (BR) FOR AN OPEN

Disconnect: RKE Keypad C500.

Use the following table to measure the resistance between the vehicle security module C2113c, harness side and RKE keypad C500 harness side:

Vehicle Security Module C2113c	Circuit	RKE Keypad C500
pin 2	121 (YE/BK)/ 78 (LB/YE)	pin 1
pin 3	123 (RD)/ 121 (YE/BK)	pin 7
pin 4	124 (BN)	pin 6
pin 9	122 (YE)/ 79 (LG/RD)	pin 3

Fig 3: Measuring Resistance Between Vehicle Security Module C2113C, Harness Side And RKE Keypad C500 Harness Side

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?

Yes : INSTALL a new RKE keypad. REFER to REMOTE KEYLESS ENTRY KEYPAD in this article. CLEAR the DTCs. REPEAT the self-test.
No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.

F5 CHECK FOR CORRECT VEHICLE SECURITY MODULE OPERATION
- Disconnect all the vehicle security module connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the vehicle security module connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new vehicle security module. REFER to MULTIFUNCTION ELECTRONIC MODULES . REPEAT the self-test.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.