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CUSTOMER CONCERN DTC P1448 returns intermittently even though the code clears and the IPU fan self-test currently passes. CAUSE Connection checks and the confirmed repair identified an intermittent failure of the Intelligent Power Unit module fan used to cool the hybrid battery. CORRECTION Remove and replace the Intelligent Power Unit module fan, then verify fan operation and confirm DTC P1448 does not return.

CUSTOMER CONCERN The IMA warning light is on with DTC P1586. The engine shuts off during auto stop but will not restart with the IMA motor; the conventional starter still cranks and starts the engine. CAUSE Inspection confirmed the IMA motor-stator bolts had backed out, allowing the stator to bind against the rotor magnet. CORRECTION Remove the transaxle and replace the damaged IMA motor stator, then verify IMA cranking and auto-stop restart operation.

CUSTOMER CONCERN The radio is inoperative. Only the theft indicator illuminates, and the CODE prompt does not appear. CAUSE Battery voltage was present at radio connector terminal A3 on the Pink wire and terminal A24 on the Purple wire, and the radio ground tested good. Inspection confirmed a navigation-equipped radio had been installed in a vehicle requiring the non-navigation unit. CORRECTION Remove the incorrect navigation radio and install the correct non-navigation radio

CUSTOMER CONCERN The skid-control warning light is on and DTC 52-1 is stored. CAUSE Power and ground checks passed. Direct pump-motor testing confirmed the pump inside the VSA modulator-control unit did not operate correctly. CORRECTION Remove and replace the VSA modulator-control unit assembly, then verify ABS and stability-control operation.

CUSTOMER CONCERN The battery warning light is on and the vehicle is not charging. DTC P1634 is stored in the IMA system, with no related ECM code. CAUSE Testing and the confirmed repair identified a failed Intelligent Power Unit module fan. CORRECTION Remove and replace the Intelligent Power Unit module fan, then verify hybrid charging-system operation.

CUSTOMER CONCERN The scan tool cannot communicate with the IMA system, and DTCs U0110 and U1205 are stored. CAUSE Testing confirmed a failed Intelligent Power Unit fan module. The failed fan module caused the No. 61 10-amp IMA fuse in the auxiliary underhood fuse box to open. CORRECTION Remove and replace the Intelligent Power Unit fan module and the open No. 61 10-amp IMA fuse, then verify IMA-module communication.

CUSTOMER CONCERN The air-conditioning system does not cool because the compressor clutch will not engage. CAUSE The confirmed repair identified a failed A/C compressor thermal protector that prevented compressor-clutch operation. CORRECTION Remove and replace the A/C compressor thermal protector, then verify compressor-clutch engagement and air-conditioning operation.

CUSTOMER CONCERN The engine starts on the 12-volt starter, but the hybrid system does not operate. DTCs U1205 and U0037 are stored. CAUSE CAN-network testing confirmed an internal Motor Control Module failure. Module communication was intermittent, and scan-tool parameter data was incomplete when communication was available. CORRECTION Remove and replace the Motor Control Module, program the replacement module, and verify hybrid-system operation.

CUSTOMER CONCERN The engine stalled and will not crank or restart. The Service Hybrid System message is displayed, and Battery Energy Control Module DTC P0BBD is stored. CAUSE Hybrid-battery testing confirmed the drive-motor battery assembly could no longer maintain the required operating voltage. CORRECTION Remove and replace the failed drive-motor battery assembly.

CUSTOMER CONCERN Brake and stability warnings remain after sequential module programming, and Electronic Brake Control Module DTCs C0561, C0299 and C12FF are stored. CAUSE Programming verification confirmed the required Electronic Brake Control Module learn procedures had not been completed. CORRECTION Perform the required Electronic Brake Control Module relearn procedures.