Qt1 Carry Out The Network Test

WARNING: This vehicle is equipped with high voltage cables, components, and wiring. The high voltage warning labels containing the high voltage symbol are located on each high voltage component. High voltage cables, and wiring are orange in color. Certified rubber insulating gloves and a face shield must be worn when working with the high voltage cables, components, or wiring. The key must be cycled to the OFF position for a minimum of 5 minutes, and the high voltage traction battery service disconnect plug placed in the servicing/shipping position before disconnecting the high voltage cables. Failure to follow these instructions may result in personal injury or death.

Do not disconnect, disable, or touch the high voltage cables, components, or wiring during the module reprogramming procedure because high voltage is present. The high voltage warning labels containing the high voltage symbol are located on each high voltage component. High voltage cables, and wiring are orange in color. Failure to follow these instructions may result in personal injury or death.

Carry out all the safety steps required to run the vehicle tests.
Complete the preliminary checks looking for obvious concerns that may relate to the symptom. Check items such as those listed:
- related electrical connectors or fuses
- vacuum lines (leaks, routing)
- air intake system (leaks, restrictions)
- fuel quality (octane, contamination, winter/summer blend)
- engine cooling system (engine operating at proper temperature)
- motor electronics cooling system
Access any related OASIS or TSB information.
Carry out the network test.
NOTE: If the scan tool being used does not support the network test, an alternative method is to attempt communication with each module on the controller area network (CAN) link.
Does the network test pass?

Yes	No
GO to QT2 .	If only the PCM or the TCM has a communication concern: refer to PINPOINT TEST QA . All others: Go to MODULE COMMUNICATIONS NETWORK article to diagnose the network concern.