Diagnostic Routine F
Diagnostic Routine F
Diagnostic Overview
Diagnosing Radio Frequency Interference Faults
Normal Operation and Fault Conditions
REFER to Radio Frequency Interference . One or more TPMS (Tire Pressure Monitoring System) sensors not being trained or missing, TPM (Tire Pressure Monitor Module) wiring and BCM (Body Control Module) wiring, or an internal failure of the TPM (Tire Pressure Monitor Module) or BCM (Body Control Module) can all present symptoms that are similar to RFI (Radio Frequency Interference).
Visual Inspection and Diagnostic Pre-checks
- Inspect for customer electronic devices, such as a cell phone charger or GPS (Global Positioning System) unit.
- Inspect for aftermarket wheels or run-flat tires (tires with steel body cord plies in the tire sidewall).
Special Tool(s)
Pinpoint Test
1. VERIFY TPM (Tire Pressure Monitor) MODULE COMMUNICATION
1. Using a scan tool, carry out the Network Test.
Does the TPM (Tire Pressure Monitor) module pass the Network Test?
2. CHECK FOR TPM (Tire Pressure Monitor) MODULE DTC (Diagnostic Trouble Code) U0140:87
1. NOTE: Make sure that all aftermarket electronic equipment has been disconnected (if possible) and that the customer has been questioned about the kinds of electronic equipment they may have been using in the vehicle when this issue was identified.
Using a scan tool, carry out the TPM (Tire Pressure Monitor) module self-test.
Is DTC (Diagnostic Trouble Code) U0140:87 present in the TPM (Tire Pressure Monitor) module?
3. VIEW THE BCM (Body Control Module) TPMS_STAT PID (Parameter Identification)
1. Ignition ON.
2. Using a scan tool, view the BCM (Body Control Module) PIDs (Parameter Identifications).
3. Monitor the BCM (Body Control Module) TPMS_STAT PID (Parameter Identification).
Does the BCM (Body Control Module) TPMS_STAT PID (Parameter Identification) display SYSTEM FAULT?
4. CARRY OUT THE SENSOR TRAINING PROCEDURE
NOTE: Before beginning TPMS (Tire Pressure Monitoring System) sensor training, make sure the vehicle is away from other vehicles, or devices that might cause RFI (Radio Frequency Interference) such as electric motors, or radio transmitters.
1. Train all 4 TPMS (Tire Pressure Monitoring System) sensors. REFER to Tire Pressure Monitoring System (TPMS) Sensor Training - Intelligent Access (IA) Tire Pressure Monitoring System (TPMS) Sensor Training - Intelligent Access (IA) or REFER to Tire Pressure Monitoring System (TPMS) Sensor Training - Integrated Keyhead Transmitter (IKT) Tire Pressure Monitoring System (TPMS) Sensor Training - Integrated Keyhead Transmitter (IKT).
Did all of the TPMS (Tire Pressure Monitoring System) sensors transmit correctly and did the horn sound when each sensor is trained?
5. ATTEMPT TO CARRY OUT THE SENSOR TRAINING PROCEDURE AGAIN USING KNOWN GOOD SENSORS
1. Move the vehicle to rotate the wheels at least one-fourth of a turn. Leave the vehicle doors open.
2. Attempt to train known good TPMS (Tire Pressure Monitoring System) sensors. REFER to Tire Pressure Monitoring System (TPMS) Sensor Training - Intelligent Access (IA) Tire Pressure Monitoring System (TPMS) Sensor Training - Intelligent Access (IA) or REFER to Tire Pressure Monitoring System (TPMS) Sensor Training - Integrated Keyhead Transmitter (IKT) Tire Pressure Monitoring System (TPMS) Sensor Training - Integrated Keyhead Transmitter (IKT).
Did the known good TPMS (Tire Pressure Monitoring System) sensors transmit correctly and did the horn sound when the known good TPMS (Tire Pressure Monitoring System) sensors were trained?
6. CHECK FOR CORRECT BCM (Body Control Module) OPERATION
1. Ignition OFF.
2. Disconnect and inspect all BCM (Body Control 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 the BCM (Body Control 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?
