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414-03A-56 414-03A-56 High Voltage/Traction Battery DIAGNOSIS AND TESTING (Continued) PINPOINT TEST H: CHARGER UNDER CURRENT FAULT TEST STEP ACTION TO TAKE NOTE: Contactor box C3985 is mounted on the passenger side of the No = REPLACE high-voltage BCM. harness (14B326) between • With key OFF, disconnect contactor box C3985 and measure the traction battery support tray resistance of the O wire between contactor box C3985F and traction in-line C1935F and battery support tray in-line C1935F. contactor box C3985. • With key OFF, measure the resistance of the W wire between contactor box C3985F and traction battery support tray in-line C1935F. • Is the resistance less than 5 ohms? H5 CHECK CHARGER CONTACTOR RELAY • Reconnect contactor box C3985. Yes = GO to H6. • Connect Traction Battery High-Voltage Service Cord to traction battery No = GO to H7. 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. • Enter BCM active command mode CONTACTOR OUTPUT CONTROL, set the active command CHARGER to CLOSE, and listen for the charger contactor relay closing. • Does the charger contactor relay close? H6 CHECK CONTACTOR BOX HIGH-VOLTAGE FUSE • Remove the 25A CHARGER fuse from the contactor box. Refer to Yes = REPLACE the 25A Contactor Box Fuses Removal and Installation procedure in this section. CHARGER fuse. • Measure the resistance of the 25A CHARGER fuse. No = REPLACE the contactor • Is the resistance greater than 1,000 ohms? box. H7 CHECK CHARGER CONTACTOR RELAY CONTROL (CLOSE SIGNAL) • Reconnect contactor box C3985. Yes = GO to H9. • Connect Traction Battery High-Voltage Service Cord to traction battery No = GO to H8. 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 and BCM C1986, C1987 using the BCM/TIM BOB Adapter Cable and Overlay. • Enter BCM active command mode CONTACTOR OUTPUT CONTROL, set the active command CHARGER to CLOSE, and measure the voltage between BOB pin B9 and ground (BOB pin A33). • Is the voltage greater than 10 volts? H8 CHECK CIRCUIT 3137 (GY/Y) FOR SHORT TO GROUND • With key OFF, disconnect BOB from BCM; leave BOB connected to Yes = REPLACE the BCM. BCM C1986 and C1987. • With key OFF, disconnect contactor box C1982 and measure the No = REPAIR the GY/Y wire. resistance between BOB pin B9 and ground (BOB pin A33). • Is the resistance greater than 10,000 ohms? H9 CHECK CIRCUIT 3137 (GY/Y) FOR OPEN • With key OFF, disconnect contactor box C1982 and measure the Yes = REPLACE the contactor resistance of the GY/Y wire between pin 20 on contactor box C1982 and box. BOB pin B9. • Is the resistance less than 5 ohms? No = REPAIR the GY/Y wire. H10 CHECK OUTPUT OF TRACTION BATTERY CHARGER • Connect the power control station (PCS) to the charger inlet connector Yes = and press the START button on the PCS. (Continued) |