Pinpoint Test N: DTC U0167:00 Or U0426:00

Anti-Theft - With Intelligent Access (IA)

Pinpoint Test N: DTC U0167:00 or U0426:00

Normal Operation

When the ignition is turned to the RUN or START mode, the Remote Function Actuator (RFA) module and the PCM send each other their ID over the High Speed Controller Area Network (HS-CAN). Each module then checks the ID it receives and compares with the ID stored in memory. If the IDs are missing or the IDs are invalid, Passive Anti-Theft System (PATS) is disabled and does not allow the engine to start.

- DTC U0167:00 (Lost Communication With Vehicle Immobilizer Control Module: No Sub Type Information)- a continuous DTC that sets when the PCM does not receive any PATS (Passive Anti-Theft System) data from the RFA (Remote Function Actuator) module over the HS-CAN (High Speed Controller Area Network). The target ID is only sent once per key cycle and within milliseconds of the ignition being turned to the RUN or START mode.

- DTC U0426:00 (Invalid Data Received From Vehicle Immobilizer Control Module: No Sub Type Information)- a continuous DTC that sets when the PCM does not receive the expected target ID from the RFA (Remote Function Actuator) module over the HS-CAN (High Speed Controller Area Network). The target ID is only sent once per key cycle and within milliseconds of the ignition being turned to the RUN or START mode. This DTC also sets if a new PCM has been installed and the PATS (Passive Anti-Theft System) Parameter Reset procedure has not been carried out.

This pinpoint test is intended to diagnose the following:

- HS-CAN (High Speed Controller Area Network) concern

- Low battery state of charge

- RFA (Remote Function Actuator) module

PINPOINT TEST N : DTC U0167:00 OR U0426:00

N1 CHECK THE RFA (Remote Function Actuator) MODULE DTCs FROM THE SELF-TEST

- Check the recorded results from the RFA (Remote Function Actuator) module self-test.

Are any RFA (Remote Function Actuator) module DTCs retrieved?

Yes
REFER to the RFA (Remote Function Actuator) module DTC Chart Anti-Theft - With Intelligent Access (IA).

No
GO to N2.

N2 CHECK THE BATTERY STATE OF CHARGE

NOTE: It might be necessary to check battery voltage while cranking the engine to make sure battery voltage is not dropping and causing the concern.

- Carry out the Battery Condition Test In Battery Pinpoint Tests.

Did the battery pass the Battery Condition Test?

Yes
GO to N3.

No
RECHARGE or REPLACE the battery.

N3 CHECK FOR COMMUNICATION WITH THE RFA (Remote Function Actuator) MODULE

- Enter the following diagnostic mode on the scan tool: Network Test.

Does the RFA (Remote Function Actuator) module respond to the scan tool?

Yes
GO to N4.

No
REFER to Information Bus.

N4 RECHECK THE PCM DTCs FROM THE SELF-TEST

- Enter the following diagnostic mode on the scan tool: Clear PCM Continuous DTCs.

- Cycle the ignition from RUN to OFF and then back to RUN.

- Enter the following diagnostic mode on the scan tool: PCM Self-Test.

Is DTC U0167:87 or U0426:81 retrieved?

Yes
GO to N5.

No
The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

N5 CHECK FOR CORRECT RFA (Remote Function Actuator) MODULE OPERATION

- Disconnect all the RFA (Remote Function Actuator) module connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the RFA (Remote Function Actuator) module connectors and make sure they seat correctly.

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

Is the concern still present?

Yes
INSTALL a new RFA (Remote Function Actuator) module. TEST the system for normal operation
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.