Pinpoint Test

1. Ignition OFF.
2. Check the keyless entry keypad illumination.

Is the keyless entry keypad illumination always on? 

• Yes: GO to  8.
• No: GO to 2  .

1. Using a scan tool, monitor the RFA module PIDs  .
2. Touch several keyless entry keypad buttons while observing the RFA 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 3  .
• No: REFER to Diagnostic Routine F: The Doors Do Not Lock or Unlock Using The Keyless Entry Keypad .

1. Using a scan tool, perform the RFA module self-test.

Is DTC B121A:11 present? 

• Yes: GO to 4  .
• No: GO to  6.

1. Disconnect: Keyless Entry Keypad.
2. Using a scan tool, clear the RFA module DTCs  .
3. Using a scan tool, perform the RFA module self-test.

Is DTC B121B:11 recorded? 

• Yes: GO to 5  .
• No: INSTALL a new keyless entry keypad. REFER to Keyless Entry Keypad .

1. Ignition OFF.
2. Disconnect: RFA Module C2153D.
3. Measure:

   Keyless Entry Keypad			Ground
   C500			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   2	CPK28 (WH/RD)		-	Ground

Is the resistance greater than 10, 000 ohms? 

• Yes: GO to  9.
• No: REPAIR the circuit.

1. Using a scan tool, view RFA module PIDs  .
2. While active commanding the RFA module PID KEYPD_LMP_OS ON, measure:

   Keyless Entry Keypad			Ground
   C500			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   2	CPK28 (WH/RD)		-	Ground

Is the voltage greater than 11 volts? 

• Yes: INSTALL a new keyless entry keypad. REFER to Keyless Entry Keypad .
• No: GO to 7  .

1. Ignition OFF.
2. Disconnect: RFA Module C2153D.
3. Measure:

   Keyless Entry Keypad			RFA Module
   C500			C2153D
   Pin	Circuit	Measurement / Action	Pin	Circuit
   2	CPK28 (WH/RD)		10	CPK28 (WH/GN)

Is the resistance less than 3 ohms? 

• Yes: GO to  9.
• No: REPAIR the circuit.

1. Disconnect: RFA Module C2153D.
2. Ignition ON.
3. Observe the keypad illumination.

Is the keypad still illuminated? 

• Yes: REPAIR the circuit.
• No: GO to 9  .

1. Ignition OFF.
2. Disconnect and inspect all RFA module connectors.
3. Repair:
   • corrosion (install new connector or terminals - clean module pins)
   • damaged or bent pins - install new terminals/pins
   • pushed-out pins - install new pins as necessary
4. Reconnect all RFA module connectors. Make sure they seat and latch correctly.
5. Operate the system and determine if the concern is still present.

Is the concern still present? 

• Yes: CHECK OASIS  for any applicable TSBs  . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs  address this concern, INSTALL a new RFA module. REFER to REMOTE FUNCTION ACTUATOR (RFA) MODULE .
• No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.