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414-03A-72 414-03A-72 High Voltage/Traction Battery DIAGNOSIS AND TESTING (Continued) PINPOINT TEST A: DTC C1755 POWER LIMIT SHUTDOWN FAULT TEST STEP ACTION TO TAKE Yes = Go to A5 • WARNING: Make sure the cooling system temperature is not hot. Failure to follow these instructions, may result in personal injury or death. Turn the ignition key ON, remove the radiator cap, and check for coolant flow. • Is there coolant flow? No = Check the cooling system for restrictions. Refer to Pump does not operate. A5 MONITOR THE TIM AND TRANSAXLE TEMPERATURE • Monitor PID TIMTEMP during a road test. Yes = Check for cooling system restrictions at TIM. • Is the temperature above 80 ° C (176 ° F)? No = Intermittant problem in the water pump circuit or the water pump. PINPOINT TEST B: BATTERY PACK/MODULE(S) VOLTAGE OUT OF RANGE TEST STEP ACTION TO TAKE B1 CHECK FOR OTHER BATTERY CONTROL MODULE (BCM) DIAGNOSTIC TROUBLE CODES (DTCs) • Perform the on-demand self-test for the BCM. Yes = • Does DTC C1864 Battery Module Fault occur? No = GO to B2. Voltage Out of Range B2 CHECK BATTERY MODULE FAULT STATUS • With key ON, monitor BCM PIDs BTM 1FT thru BTM39FT. Yes = GO to B3. • Do any of the battery module fault PIDs indicate YES? No = B3 CHECK VOLTAGE SENSE LINE CIRCUIT BETWEEN BCM AND IN-LINE CONNECTOR FOR OPEN • Remove the traction battery and connect Traction Battery High-Voltage Yes = Lockout and Diagnostic Tool to the traction battery high-voltage two-pin C3994M. No = WARNING: The traction battery contains high-voltage components and wiring. High-voltage insulated safety gloves and face shield must be worn when performing the following steps. Failure to follow this warning may result in severe personal injury or death. • With key OFF, disconnect BCM high-voltage C1865, C1866 and the appropriate in-line connector for the battery module(s) in question. NOTE: If a single battery module fault PID (with the exception of BTM 1FT and BTM39FT) indicates YES, check the battery module in question for reverse cable polarity. Reinstall (correctly) if necessary. If the cable polarity is OK, GO to B6. • Measure the resistance of the wire between the BCM high-voltage connector and in-line connector for the indicated battery module fault(s). Use the following information: Battery Module Faults (Continued) |