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414-03A-52 414-03A-52 High Voltage/Traction Battery DIAGNOSIS AND TESTING (Continued) PINPOINT TEST C: DTC C1838 CHARGER SYSTEM FAULT TEST STEP ACTION TO TAKE • Wait approximately five minutes and retrieve continuous DTCs from the No = System OK. BCM. • Does DTC C1838 Charging System Fault occur? C2 IDENTIFY CHARGING SYSTEM FAULT • With vehicle on-charge, monitor the following BCM PIDs: Yes = REFER to Symptom Chart. No = REPEAT test step C1. IF DTC C1838 does not occur, system OK. CHECK wiring for intermittent connections. Charging System Fault PID/Description ABD = Charger Charging After Being Disabled — CHG CYF = Charger Cycling Fault — CHG LCF = Charger Line Capacity Fault — CHG LUF = Charger Latchup Fault — CHG MFF = Charger Mode Feedback Fault — CHG OAF = Charger Over Amp-Hours Fault — CHG OCF = Charger Over Current Fault — CHG OTF = Charger Over-Temperature Fault — CHG OVF = Charger Over Voltage Fault — CHG UCF = Charger Under Current Fault • Do any of the charging system fault PIDs indicate YES? PINPOINT TEST D: CHARGER CHARGING AFTER BEING DISABLED FAULT TEST STEP ACTION TO TAKE D1 CHECK CHARGER CHARGING AFTER BEING DISABLED STATUS • Verify the vehicle is connected to the power control station (PCS) and Yes = DISCONNECT the PCS the START button has been depressed to begin charging. from the vehicle. GO to D2. NOTE: Wait approximately up to five minutes to allow the CHG ABD No = System OK. CHECK wiring PID to be set. for intermittent connections. • With key OFF and vehicle on-charge, monitor BCM PID CHG ABD. • Does the CHG ABD PID indicate YES? D2 CHECK CONTACTOR BOX AUXILIARY CURRENT SENSOR FOR IN-RANGE FAILURE • With key ON, monitor BCM PID AUX CNT. Yes = GO to D3. • Turn the headlamps on. No = REPLACE the contactor • Does the amperage for the AUX CNT PID increase by at least 0.5 box. amps? D3 CHECK CIRCUIT 3827 (GY/W) (OUTSIDE OF TRACTION BATTERY SUPPORT TRAY) FOR OPEN • With key OFF, disconnect traction battery support tray in-line C1939 and Yes = GO to D4. connect 104-Pin Breakout Box (BOB) to in-line C1939M using Traction Battery Low-Voltage Service Cord; do not connect Traction Battery Low-Voltage Service Cord to in-line C1939F. • With key OFF, disconnect traction battery charger C1991 and measure No = REPAIR the GY/W wire. the resistance of the GY/W wire between pin 4 on traction battery charger C1991 and BOB pin 57. • Is the resistance less than 5 ohms? D4 CHECK CIRCUIT 3827 (GY/W) (OUTSIDE OF TRACTION BATTERY SUPPORT TRAY) FOR SHORT TO GROUND (Continued) |