Pinpoint Test AG: The Doors Do Not Lock/Unlock Using The Keyless Entry Keypad
Handles, Locks, Latches and Entry Systems - With Intelligent Access (IA)
Pinpoint Test AG: The Doors Do Not Lock/Unlock Using The Keyless Entry Keypad
Refer to Wiring Diagram Set 117, Remote Keyless Entry and Alarm for schematic and connector information. Diagrams By Number
Normal Operation
The keyless entry keypad is a touch sensitive capacitive sensor. When a finger touches the keypad it changes the capacitance of the sensor in the area of the finger touch. The keypad is then able to determine which area was touched and sends a ground signal to the Remote Function Actuator (RFA) module on the corresponding reference circuit(s). The keypad only works when touched with a finger. The keyless entry keypad may not work when gloves are worn. The gloves act as an insulator and do not allow the finger to change the sensor capacitance.
The Remote Function Actuator (RFA) module monitors for a ground signal on the keyless entry keypad signal input circuits. When an individual keypad button is touched, an individual or combination of the input circuits is routed to ground. The RFA (Remote Function Actuator) module then determines which button was touched based on which circuit(s) are grounded. The keypad has dedicated voltage supply and ground circuits. Once the RFA (Remote Function Actuator) module determines that the 5-digit personal entry code, or the factory set 5-digit entry code has been entered on the keypad, the RFA (Remote Function Actuator) module then unlocks the driver door (if stepped unlock is enabled).
To unlock all the doors (if stepped unlock is disabled), the 3/4 button must be touched within 5 seconds of the 5-digit code being entered.
To release the luggage compartment lid, the 5/6 button must be touched 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. Touch and hold the 7/8 and 9/0 buttons at the same time for approximately 1 second.
The keyless entry keypad is also used for driver door Intelligent Access (IA).
The permanent keyless entry keypad code is permanently stored in the SJB (Smart Junction Box) and cannot be changed. The code is also printed on a label, located on the SJB (Smart Junction Box). The permanent code from the SJB (Smart Junction Box) is programmed into the RFA (Remote Function Actuator) module. The permanent keypad code can also be retrieved with the scan tool. The scan tool retrieves the permanent keycode from the RFA (Remote Function Actuator) module.
NOTE: The permanent keypad code in the scan tool does not display even numbers. If the permanent code has even numbers in it, the scan tool will display an odd number that corresponds with the same button on the keypad. For example, if the keycode contains the number 2, the scan tool will display the number 1 in its place.
- DTC B121B:11 (Keypad Input Switch: Circuit Short To Ground)- an on-demand DTC that sets when the RFA (Remote Function Actuator) module detects a short to ground on any of the keyless entry keypad input circuits.
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Keyless entry keypad
- RFA (Remote Function Actuator) module
PINPOINT TEST AG : THE DOORS DO NOT LOCK/UNLOCK USING THE KEYLESS ENTRY KEYPAD
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings.
AG1 CHECK THE KEYLESS ENTRY KEYPAD ILLUMINATION
- Touch anywhere on the keyless entry keypad.
Do the keypad numbers illuminate?
Yes
GO to AG5.
No
GO to AG2.
AG2 CHECK THE KEYLESS ENTRY KEYPAD INDICATOR
- Touch anywhere on the keyless entry keypad.
Does the round indicator on the top of the keypad light up?
Yes
GO to Pinpoint Test AH. Pinpoint Test AH: The Keyless Entry Keypad Illumination Is Inoperative/Does Not Operate Correctly
No
GO to AG3.
AG3 CHECK THE KEYLESS ENTRY KEYPAD VOLTAGE SUPPLY CIRCUIT FOR VOLTAGE
- Ignition OFF.
- Disconnect: Keyless Entry Keypad C530.
- Measure the voltage between the keyless entry keypad C530-1, circuit SBP13 (GY/RD), harness side and ground.
Is the voltage greater than 10 volts?
Yes
GO to AG4.
No
VERIFY the SJB (Smart Junction Box) fuse 13 (5A) is OK. If OK, REPAIR the circuit for an open. If not OK, Refer to the Wiring Diagrams to identify the possible causes of the circuit short. Diagrams By Number
AG4 CHECK THE KEYLESS ENTRY KEYPAD GROUND CIRCUIT FOR AN OPEN
- Disconnect: Negative Battery Cable.
- Measure the resistance between the keyless entry keypad C530-6, circuit GD133 (BK), harness side and ground.
Is the resistance less than 5 ohms?
Yes
INSTALL a new keyless entry keypad. REFER to Keyless Entry Keypad . TEST the system for normal operation.
No
REPAIR the circuit for an open. TEST the system for normal operation.
AG5 COMPARE THE KEYCODE PID
NOTE: The permanent keypad code in the scan tool does not display even numbers. If the permanent code has even numbers in it, the scan tool will display an odd number that corresponds with the same button on the keypad. For example, if the keycode contains the number 2, the scan tool will display the number 1 in its place.
- Enter the following diagnostic mode on the scan tool: Keyless Entry Keypad Code.
NOTE: The keyless entry keypad code is located under Toolbox, Body, Security.
- Observe and record the keyless entry keypad code using the scan tool.
- Obtain the keyless entry keypad code from the label on the SJB (Smart Junction Box) or from the Owner's Literature.
Does the keycode from the scan tool correspond with the keycode from the SJB (Smart Junction Box) label or Owner's Literature?
Yes
GO to AG6.
No
REFER to Keyless Entry Keypad Code Programming . CARRY OUT the keyless entry keypad code reset. TEST the system for normal operation.
AG6 CHECK THE KEYCODE
- Enter the 5-digit permanent entry code on the keyless entry keypad, then touch the 3/4 button.
Do the doors unlock?
Yes
The system is operating as designed. INFORM the customer of the correct system operation.
No
GO to AG7.
AG7 RETRIEVE THE RECORDED RFA (Remote Function Actuator) MODULE DTCs FROM THE SELF-TEST
- Check for recorded RFA (Remote Function Actuator) module DTCs from the self-test.
Is DTC B121B:11 recorded?
Yes
GO to AG8.
No
GO to AG10.
AG8 REPEAT THE RFA (Remote Function Actuator) MODULE SELF-TEST
- Disconnect: Keyless Entry Keypad C530.
- Clear the DTCs, then repeat the RFA (Remote Function Actuator) module self-test.
Is DTC B121B:11 recorded?
Yes
GO to AG9.
No
INSTALL a new keyless entry keypad. REFER to Keyless Entry Keypad . TEST the system for normal operation.
AG9 CHECK THE KEYLESS ENTRY KEYPAD INPUT CIRCUITS FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: RFA (Remote Function Actuator) Module C2153D.
- Measure the resistance between the keypad, harness side and ground as follows:
Are the resistances greater than 10,000 ohms?
Yes
GO to AG14.
No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
AG10 CHECK THE RFA (Remote Function Actuator) MODULE KEYPAD PIDs
- Enter the following diagnostic mode on the scan tool: RFA (Remote Function Actuator) DataLogger.
- Press each keyless entry keypad button while observing the RFA (Remote Function Actuator) module PIDs (Keypd_SW_1_2), (Keypd_SW_3_4), (Keypd_SW_5_6), (Keypd_SW_7_8) and (Keypd_SW_9_0).
Do the PIDs display the correct values?
Yes
GO to AG14.
No
GO to AG11.
AG11 CHECK THE KEYLESS ENTRY KEYPAD
- Disconnect: Keyless Entry Keypad C530.
- Connect a fused jumper wire between the keyless entry keypad harness side, while monitoring the RFA (Remote Function Actuator) module PIDs as follows:
Do the PIDs display ACTIVE when the jumper wire is connected?
Yes
INSTALL a new keyless entry keypad. REFER to Keyless Entry Keypad .
No
GO to AG12.
AG12 CHECK THE KEYLESS ENTRY KEYPAD INPUT CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: RFA (Remote Function Actuator) Module C2153D.
- Measure the resistance between the RFA (Remote Function Actuator) module, harness side and the keyless entry keypad, harness side as follows:
Are the resistances less than 5 ohms?
Yes
GO to AG13.
No
REPAIR the circuit in question. TEST the system for normal operation.
AG13 CHECK THE KEYLESS ENTRY KEYPAD INPUT CIRCUITS FOR A SHORT TO EACH OTHER
- Measure the resistance between the keypad, harness side as follows:
Are the resistances greater than 10,000 ohms?
Yes
GO to AG14.
No
REPAIR the circuit in question. TEST the system for normal operation.
AG14 CHECK FOR CORRECT RFA (Remote Function Actuator) MODULE OPERATION
- Disconnect all the RFA (Remote Function Actuator) module connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the RFA (Remote Function Actuator) 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 RFA (Remote Function Actuator) module. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.