U1433-01

U1433-01-IMPLAUSIBLE IGNITION SWITCH STATUS MESSAGE RECEIVED - GENERAL ELECTRICAL FAILURE

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
During a Passive Entry or Keyless Go event.

- Set Condition:
The Radio Frequency Hub (RF Hub) receives a Bussed Input message of the Ignition Switch status from the Body Control Module (BCM). If that message does not agree with the RF Hub Ignition Switch status, this code will set. The BCM also sends a Ignition Switch "Sensor" message (hard wired F20 circuit). If the RF Hub and the BCM do not agree on Both of those messages, the PCM will not allow the engine to start.





1. CHECK FOR ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. With the scan tool, record and erase the DTCs.
2. Turn the ignition off and wait one minute.
3. Turn the ignition on.
4. With the scan tool, select: RF Hub.
5. With the scan tool, read the Active DTCs.

Does the scan tool display: U1433-01-IMPLAUSIBLE IGNITION SWITCH STATUS MESSAGE RECEIVED - GENERAL ELECTRICAL FAILURE as active?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE IGNITION SWITCH STATUS
1. Turn the ignition on.
2. With the scan tool select; RF Hub, Data.
3. Read and record the Ignition Switch Status, Bussed Input.
4. With the scan tool select; BCM, Data.
5. Read and record the Ignition Switch Status, Bussed Input.
6. Compare the messages from both modules with the actual Ignition Switch position.

Which module is displaying the wrong Ignition Switch status?

Body Control Module

- Replace the Body Control Module. Body Control Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Radio Frequency Hub

- Replace the RF Hub module. Radio Frequency Module (RF Hub) - Removal.
- Perform the RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST. RF Hub Verification Test