U1145

U1145-LOST COMMUNICATION WITH KEYLESS GO SECURITY MODULE

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

NOTE:
The Keyless Go Security Module feature is a function of the Passive Entry Module (PEM). The diagnostic procedures for the Keyless Go Security Module are performed on the PEM.

- When Monitored:
With the ignition on.

Battery voltage between 10 and 16 volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.

- Set Condition:
Bus messages not received from the Keyless Go Security Module (PEM) for approximately two to five seconds.





Diagnostic Test

1. VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE

NOTE: Make sure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

1. With the scan tool, read active DTCs.

Is this DTC active?

Yes
- Go To 2

No
- Stored Lost Communication DTCs and perform the Stored Lost Communication DTCs diagnostic procedure.

2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
1. With the scan tool, read active DTCs from all modules.

NOTE: Check for TIPM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.

Does the scan tool display any active DTCs to the conditions listed above?

Yes
- Perform the appropriate diagnostic procedure.

No
- Go To 3

3. VERIFY THE PEM IS ACTIVE ON THE BUS
1. Turn the ignition on.
2. With the scan tool, view all the modules.
3. Verify the PEM is active on the bus.

Is the PEM active on the bus?

Yes
- Go To 4

No
- No Response From PEM (Passive Entry Module) and perform the No Response from PEM diagnostic procedure.

4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
1. With the scan tool, view all the modules.

Is there more than one module with active DTCs "Logged Against" the PEM?

Yes
- Replace/update the Passive Entry Module. .
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No
- Replace/update the module that set this DTC.
- Perform the appropriate verification test for the module being replaced. If there is no verification test for the associated module perform the BODY VERIFICATION TEST. Body Verification Test.