CUSTOMER CONCERN The vehicle will not power up or start. The 12-volt battery tests good, but voltage is low at the underhood jump terminal. CAUSE The stud at No. 3 short connector A90/Y7 was loose, creating excessive resistance and a voltage drop between the 12-volt battery and underhood power distribution. CORRECTION Repair and secure the loose stud at No. 3 short connector A90/Y7, then verify full battery voltage at the underhood jump terminal and normal Ready-mode operatio

CUSTOMER CONCERN The vehicle will not start, ignition power is present, and the scan tool cannot communicate with any control module. CAUSE Spread terminals in the data link connector prevented reliable contact with the scan-tool connector. DLC terminal 16 had battery voltage and terminals 4 and 5 had good grounds. CORRECTION Repair the spread data link connector terminals and verify the scan tool communicates with the vehicle modules and the vehicle starts normally.

CUSTOMER CONCERN The vehicle intermittently will not enter Ready mode even though the instrument cluster illuminates. Cycling the start switch four or five times eventually allows it to start, and no DTCs are stored. CAUSE The confirmed repair identified a failed high-voltage battery pack as the source of the intermittent no-Ready condition. CORRECTION Remove and replace the failed high-voltage battery pack and verify the vehicle enters Ready mode consistently through repeate

CUSTOMER CONCERN The vehicle will not start or move under electric power after transmission work and stores DTCs P0A0C and P1E00. CAUSE The power-inverter-module cable cover did not complete the high-voltage interlock circuit because it was missing, damaged, or incorrectly seated. CORRECTION Remove and replace the power-inverter-module cable cover, seat the high-voltage interlock connector correctly, clear P0A0C and P1E00, and verify Ready mode and propulsion.

CUSTOMER CONCERN Engine will not start because the fuel pump has no power or fuel pressure, although bypassing the relay makes the pump run. CAUSE The ECM grounded the Yellow control wire at engine-room fuse-box connector 1E terminal 8 during crank, but no voltage appeared at connector 1E terminal 13. Testing confirmed failure of the integral circuit-opening relay section in the fuse box. CORRECTION Remove and replace the engine-room fuse-box relay section containing the non-

CUSTOMER CONCERN The vehicle will not start, and inverter-performance DTC P0A94-557 is stored. CAUSE Campaign diagnosis confirmed an internal failure of the inverter/converter assembly. CORRECTION Remove and replace the failed inverter/converter assembly and complete the applicable campaign software update.

CUSTOMER CONCERN The engine will not start after installation of an auxiliary battery pack, and DTC P0A0D is stored. CAUSE Inspection confirmed the high-voltage battery service-plug grip was not fully seated and locked, leaving the interlock circuit open. CORRECTION Remove and correctly reinstall the high-voltage battery service-plug grip, then fully engage its locking lever.

CUSTOMER CONCERN The vehicle will not start after replacement of a weak 12-volt battery. The brake lamps are inoperative, and the skid-control and engine modules will not communicate. CAUSE Power-distribution testing confirmed the 140-amp DC-DC fuse in the engine-compartment fuse box was open. CORRECTION Remove and replace the failed 140-amp DC-DC fuse.

CUSTOMER CONCERN The vehicle intermittently will not start, and the brake lamps are intermittently inoperative. CAUSE Voltage testing at the four-terminal brake-light switch confirmed the switch failed to provide a consistent output signal. CORRECTION Remove and replace the failed brake-light switch.

CUSTOMER CONCERN The vehicle loses power, displays a pull-over warning, and will not restart. DTC P0A0A is stored in the hybrid control system. CAUSE Testing confirmed a failed traction-battery harness in the high-voltage interlock circuit. CORRECTION Remove and replace the failed traction-battery harness.

CUSTOMER CONCERN The engine will not start after front-bumper-cover installation, and DTCs U0111 and U0294 return each time the key is switched on. CAUSE Network inspection confirmed a fault at the powertrain control module connector in the front-bumper-area high-speed CAN circuit. CORRECTION Repair the failed powertrain control module connector and terminal connection.

CUSTOMER CONCERN The engine will not start, there is no ignition spark, and the scan tool cannot communicate with the powertrain control module. CAUSE Testing confirmed an internal failure of the powertrain control module. CORRECTION Remove and replace the failed powertrain control module.

CUSTOMER CONCERN Vehicle will not crank after engine service, and DTCs P1AE2, P1B05 and P1B06 are stored. CAUSE Inspection confirmed the drive-motor-generator control-module sight shield was not installed, leaving the high-voltage interlock circuit open. CORRECTION Install and secure the drive-motor-generator control-module sight shield to close the high-voltage interlock circuit.

CUSTOMER CONCERN Ignition key is difficult to turn and the vehicle intermittently will not start. CAUSE Inspection confirmed the steering-column lock module was binding. CORRECTION Remove and replace the binding steering-column lock module.

CUSTOMER CONCERN Engine stalls intermittently and may not restart with DTC U0073 stored. CAUSE Network testing confirmed an internal Engine Control Module failure. CORRECTION Remove and replace the failed Engine Control Module. Program and configure the replacement module.

CUSTOMER CONCERN Engine stalls intermittently and may not restart, with no fuel pressure and DTCs P0230 and U0109. CAUSE Testing confirmed an internal failure of the fuel-pump control module. CORRECTION Remove and replace the failed fuel-pump control module. Program and configure the replacement module.

CUSTOMER CONCERN Vehicle will not crank after hybrid-system repair and DTC P0633 is stored. CAUSE The theft-deterrent system lost the required immobilizer identification during the repair. CORRECTION Perform the immobilizer relearn procedure.

CUSTOMER CONCERN Vehicle will not restart and stores DTCs P0AFB, U0111 and U1897. CAUSE Diagnosis found a poor connection at the 36-volt battery-cable connector. CORRECTION Repair the 36-volt battery-cable connector and restore a secure electrical connection.

CUSTOMER CONCERN Vehicle will not enter READY mode after brake service. CAUSE The high-voltage battery service plug was not fully secured, leaving the service-plug interlock circuit open. CORRECTION Correctly install and secure the high-voltage battery service plug.