Pinpoint Test G: The Remote Function Actuator (RFA) Module Does Not Respond To The Scan Tool
Communications Network
Pinpoint Test G: The Remote Function Actuator (RFA) Module Does Not Respond To The Scan Tool
Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information. Diagrams By Number
Refer to Wiring Diagram Set 110, Power Door Locks for schematic and connector information. Diagrams By Number
Normal Operation
The Remote Function Actuator (RFA) module communicates with the scan tool and some network modules on the Medium Speed Controller Area Network (MS-CAN), and communicates with other network modules only on the High Speed Controller Area Network (HS-CAN).
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- RFA module
PINPOINT TEST G: THE RFA 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 will result in false resistance readings. Refer to Battery, Mounting and Cables Battery Disconnect.
-------------------------------------------------
G1 CHECK THE RFA MODULE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: RFA module (Gray Hardshell) and C3503B (Green Hardshell).
- Ignition ON.
- Measure the voltage between the RFA module, circuit SBP09 (RD), harness side and ground; and C3503A-2, circuit SBP14 (BN/RD), harness side and ground.
- Measure the voltage between the RFA module, circuit CDC32 (BN/YE), harness side and ground.
- Are the voltages greater than 10 volts?
Yes
GO to G2.
No
VERIFY the Central Junction Box (CJB) fuses 1 (15A), 9 (20A) and 14 (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. CLEAR the DTCs. REPEAT the network test with the scan tool. Diagrams By Number
-------------------------------------------------
G2 CHECK THE RFA MODULE GROUND CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the RFA module, circuit GD145 (BK/BU), harness side and ground.
- Disconnect: RFA module (Natural Hardshell).
- Measure the resistance between the RFA module, circuit GD145 (BK/BU), harness side and ground; and RFA module, circuit GD145 (BK/BU) harness side and ground.
- Are the resistances less than 5 ohms?
Yes
GO to G3.
No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
-------------------------------------------------
G3 CHECK THE HS-CAN CIRCUITS BETWEEN THE RFA MODULE AND THE DLC FOR AN OPEN
- Measure the resistance between the RFA module, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side.
- Measure the resistance between the RFA module, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Are the resistances less than 5 ohms?
Yes
GO to G4.
No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
-------------------------------------------------
G4 CHECK THE MS-CAN CIRCUITS BETWEEN THE RFA MODULE AND THE DLC FOR AN OPEN
- Measure the resistance between the RFA module, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side.
- Measure the resistance between the RFA module, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side.
- Are the resistances less than 5 ohms?
Yes
CONNECT the negative battery cable. GO to G5.
No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
-------------------------------------------------
G5 CHECK FOR CORRECT RFA MODULE OPERATION
- Disconnect the RFA module connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the RFA module connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new RFA module. REFER to Multifunction Electronic Modules Service and Repair. 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.
-------------------------------------------------