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100-09-21 100-09-21 Powertrain Diagnostic Routines Identification DIAGNOSIS AND TESTING (Continued) ROUTINE 6: NOTICEABLE DECREASE IN VEHICLE DRIVING RANGE (LEAD ACID VEHICLES) TEST STEP ACTION TO TAKE • Is the vehicle equipped with traction battery heaters? No = INFORM the customer that the decrease in vehicle driving range may be due to harsh driving or storage conditions, or not allowing the vehicle to charge to the full state of charge (SOC). 6-3 CHECK STATUS OF HEATER PRESENT SIGNAL • With key ON, monitor BCM PID HTRPRST. Yes = INFORM the customer that the decrease in vehicle driving range may be due to harsh driving or storage conditions, or not allowing the vehicle to charge to the full state of charge (SOC). • Does the HTRPRST PID indicate YES? No = GO to 6-4. 6-4 CHECK HEATER PRESENT SIGNAL FROM CONTACTOR BOX • Remove the traction battery and connect Traction Battery High-Voltage Yes = REPLACE the BCM. Lockout and Diagnostic Tool to the traction battery high-voltage two-pin REFER to Section C3994M. No = GO to 6-5. WARNING: The traction battery contains high-voltage components and wiring. High-voltage insulated safety gloves and face shield must be worn when carrying out the following steps. Failure to follow this warning may result in severe personal injury or death. • Connect Traction Battery High Voltage Service Cord to traction battery support tray in-line C1935F and in-line C1935M. • Connect Traction Battery Low Voltage Service Cord to traction battery support tray in-line C1939F and in-line C1939M. • Connect 104-Pin Breakout Box (BOB) to BCM C1986, C1987 using the BCM/TIM BOB Adapter Cable and Overlay; leave the BCM disconnected. • With key OFF, measure the resistance between BOB pin A31 and ground (BOB pin A33). • Is the resistance less than 20 ohms? 6-5 CHECK CIRCUIT 3007 (P/Y) FOR OPEN • With key OFF, disconnect contactor box C1982 and measure the Yes = GO to 6-6. resistance of the P/Y wire between pin 14 on contactor box C1982 and BOB pin A31. • Is the resistance less than 5 ohms? No = REPAIR the P/Y wire. 6-6 CHECK HEATER JUMPER CIRCUIT 1161 (DB/O) FOR OPEN • With key OFF, disconnect contactor box C1864 and measure the Yes = REPLACE the contactor resistance of the DB/O wire between pins D and E on contactor box box. REFER to Section C1864. • Is the resistance less than 5 ohms? No = REPLACE high-voltage harness (10B700). |