Pinpoint Test Z: The Remote Function Actuator (RFA) Module Does Not Respond To The Scan Tool
Communications Network
Pinpoint Test Z: The Remote Function Actuator (RFA) Module Does Not Respond To The Scan Tool
Normal Operation
The Remote Function Actuator (RFA) module communicates with the scan tool through the Medium Speed Controller Area Network (MS-CAN).
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- RFA (Remote Function Actuator) module
PINPOINT TEST Z : THE RFA (Remote Function Actuator) MODULE DOES NOT RESPOND TO THE SCAN TOOL
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 results in false resistance readings.
Z1 CHECK THE RFA (Remote Function Actuator) MODULE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: RFA (Remote Function Actuator) module C2153C (Natural hardshell).
- Ignition ON.
- Measure the voltage between the RFA (Remote Function Actuator) module C2153C-1, circuit SBP23 (WH/RD), harness side and ground; and the RFA (Remote Function Actuator) module C2153C-5, circuit SBP27 (BU/RD), harness side and ground.
Are the voltages greater than 10 volts?
Yes
GO to Z2.
No
VERIFY the Body Control Module (BCM) fuses 23 (15A) and 27 (20A) are OK. If OK, REPAIR the circuit in question. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short [1][2]Diagrams By Number. CLEAR the DTCs. REPEAT the network test with the scan tool.
Z2 CHECK THE RFA (Remote Function Actuator) MODULE GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the RFA (Remote Function Actuator) module C2153C-3, circuit GD115 (BK/GY), harness side and ground.
- Disconnect: RFA (Remote Function Actuator) module C2153D (Gray hardshell).
- Measure the resistance between the RFA (Remote Function Actuator) module C2153D-1, circuit GD115 (BK/GY), harness side and ground.
Is the resistance less than 5 ohms?
Yes
GO to Z3.
No
REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
Z3 CHECK THE MS-CAN (Medium Speed Controller Area Network) CIRCUITS BETWEEN THE RFA (Remote Function Actuator) MODULE AND THE DLC (Data Link Connector) FOR AN OPEN
- Disconnect: RFA (Remote Function Actuator) module C2153E (Green hardshell).
- Measure the resistance between the RFA (Remote Function Actuator) module C2153E-5, circuit VDB06 (GY/OG), harness side and the DLC (Data Link Connector) C251-3, circuit VDB06 (GY/OG), harness side.
- Measure the resistance between the RFA (Remote Function Actuator) module C2153E-4, circuit VDB07 (VT/OG), harness side and the DLC (Data Link Connector) C251-11, circuit VDB07 (VT/OG), harness side.
Are the resistances less than 5 ohms?
Yes
CONNECT the negative battery cable. GO to Z4.
No
REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
Z4 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 are seated 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. CLEAR the DTCs. REPEAT the network test with the scan tool.
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 network test with the scan tool.