Diagnostic Routine Z

Diagnostic Routine Z

Diagnostic Overview

The Remote Function Actuator (RFA) Module Does Not Respond To The Scan Tool

Refer to Wiring Diagram Set 14 for schematic and connector information Electrical Diagrams.

Refer to Wiring Diagram Set 117 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

The RFA (Remote Function Actuator) module communicates with the scan tool through the MS-CAN (Medium Speed Controller Area Network).

Visual Inspection and Diagnostic Pre-checks

Verify BCM (Body Control Module) fuses 23 (15A) and 27 (20A) are OK.

Pinpoint Test

1. CHECK THE RFA (Remote Function Actuator) MODULE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN

1. Ignition OFF.

2. Disconnect: RFA (Remote Function Actuator) module C2153C (Blue hardshell).

3. Ignition ON.

4. Measure:





Is the voltage greater than 11 volts?






2. CHECK THE RFA (Remote Function Actuator) MODULE GROUND CIRCUIT FOR AN OPEN

1. Ignition OFF.

2. Measure:





Is the resistance less than 3 ohms?






3. 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

1. Disconnect: RFA (Remote Function Actuator) module C2153E (Brown hardshell).

2. Measure:





Are the resistances less than 3 ohms?






4. CHECK FOR CORRECT RFA (Remote Function Actuator) MODULE OPERATION

1. Ignition OFF.

2. Disconnect and inspect the RFA (Remote Function Actuator) module connectors.

3. Repair:

- corrosion (replace connector or terminals- clean module pins)
- damaged or bent pins- replace terminals/pins
- pushed-out pins- replace pins as necessary

4. Reconnect the RFA (Remote Function Actuator) module connectors. Make sure they seat and latch correctly.

5. Operate the system and verify the concern is still present.

Is the concern still present?