Test F: The Doors Do Not Lock/Unlock Using The Keyless Entry Keypad
PINPOINT TEST F: THE DOORS DO NOT LOCK/UNLOCK USING THE KEYLESS ENTRY KEYPADNormal Operation
The smart junction box (SJB) monitors for a ground signal on the 12-volt reference circuits CPK29 (GY/BU), CPK30 (VT/GN), and CPK31 (YE/GN) for the keyless entry keypad. When an individual keypad button is pressed, an individual or a combination of the reference circuits are connected to ground. The SJB then determines which button was pressed based on which circuit(s) has a ground signal. Circuit GD133 (BK) is the ground for the keypad buttons. Once the SJB determines that the 5-digit personal entry code, or the factory set 5-digit entry code has been entered on the keypad, the SJB then energizes the driver door unlock relay to unlock the driver door.
To unlock all the doors, the 3/4 button must be pressed within 5 seconds of the 5-digit code being entered.
To lock all the doors, the 5-digit code does not need to be entered. Press the 7/8 and 9/0 buttons at the same time, with the driver door closed.
The keyless entry keypad has an anti-scan feature to help prevent theft. If a valid 5-digit code is not entered within 7 attempts (35 consecutive button presses), the keyless entry keypad will go into anti-scan. In anti-scan mode, the keypad illumination will flash and all input will be ignored except for pressing the 7/8 and 9/0 buttons, which will lock all doors.
- DTC B2A26 (Keypad Switch Circuit Failure) - is a continuous and on-demand DTC that sets when the SJB detects a short to ground on any of the keyless entry keypad input circuits CPK29 (GY/BU), CPK30 (VT/GN), or CPK31 (YE/GN). The DTC is also set if any of the keyless entry keypad buttons are actuated for longer than 2 minutes.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Keyless entry keypad
- SJB
F1-F5:
F6-F9:
F9-F10:
