U1197

U1197-SECURITY SEED RESPONSE NOT RECEIVED FROM ECM/PCM

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

Theory of Operation

Whenever a Fob Integrated Key (FOBIK) is inserted in the Wireless Ignition Node (WIN), the WIN performs a self test and resynchronization routine. During the routine, the WIN interrogates the FOBIK for the secret key information and performs a CAN Bus message handshake with the Powertrain Control Module (PCM). The PCM must reply to the WIN that the secret key information matches to initiate the start sequence or this code will set on the third attempt.

- When Monitored:
Whenever a FOBIK is rotated to the Run position.

- Set Condition:
This DTC sets if the WIN does not receive a CAN Bus message from the ECM/PCM. This code will set on the 20th start attempt.

One of the most probable causes for this code to set is a blown fuse or bent pins on the PCM RUN/START circuits. The result is the PCM does not know the ignition has been turned to the RUN position and does not know to respond to the seed request. Check the PCM RUN/START circuits to the PCM before proceeding with this procedure.





VERIFY PCM PROGRAMMING
1. Using the scan tool, record and erase all DTCs in the PCM.
2. Turn the Ignition Off, and wait fifteen seconds before turning the Ignition On.
3. Wait one minute, and read the active PCM DTCs.

Does the scan tool display: U1197-SECURITY SEED RESPONSE NOT RECEIVED FROM ECM/PCM as active?

Yes

- Perform the PCM/ECM REPROGRAMMING procedure. Testing and Inspection.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.

No

- Repair is complete.
- Perform the BODY VERIFICATION TEST. Body Verification Test.