Ford 2001 Ranger, Manual

Page: 453 / 1218

414-03A-50 414-03A-50 High Voltage/Traction Battery
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST B: DTC C1837 BATTERY HEATER CIRCUIT FAILURE
TEST STEP ACTION TO TAKE
B4 CHECK CONTACTOR BOX HIGH-VOLTAGE FUSE
•
Remove the 10A HTR fuse from the contactor box. Refer to the Yes = REPLACE the 10A HTR
Contactor Box Fuses Removal and Installation procedure in this section. fuse.
•
Measure the resistance of the 10A HTR fuse. No = REPLACE the contactor
•
Is the resistance greater than 1,000 ohms?
box.
B5 CHECK UPPER BATTERY HEATERS FOR OPEN
•
Remove the traction battery and connect Traction Battery High-Voltage Yes = GO to B7.
Lockout and Diagnostic Tool to the traction battery high-voltage two-pin
C3994M.
No = GO to B6.
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.
•
Disconnect contactor box C1864 and measure the resistance between pin
B (BK wire) and pin C (R wire) on contactor box C1864. Record
resistance value on the Repair Order.
•
Is the resistance between 330 and 390 ohms?
B6 CHECK CIRCUITS 3709 (R) AND 57 (BK) FOR OPEN(S)
•
With key OFF, disconnect upper battery heater C1859 and measure the Yes = DISCONNECT and
resistance of the R wire between pin C on contactor box C1864 and MEASURE the resistance of
upper battery heater C1859. each upper battery module
heater (the resistance should
be between 28 and 32
ohms). REPLACE the
battery module heater(s) in
question.
•
With key OFF, disconnect upper battery heater C1861 and measure the No = REPLACE high-voltage
resistance of the BK wire between pin B on contactor box C1864 and harness 10B700.
upper battery heater C1861.
•
Are the resistances less than 5 ohms?
B7 CHECK BATTERY HEATER #1 CONTROL (CLOSE SIGNAL)
•
Connect Traction Battery High-Voltage Service Cord to traction battery Yes = GO to B9.
support tray in-line C1935F and in-line C1935M.
•
Connect Traction Battery Low-Voltage Service Cord to traction battery No = GO to B8.
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 BCM PACKETED COMMANDS, set
the active command BAT HTR 1 to ENABLE, and measure the voltage
between BOB pin A2 and ground (BOB pin A33).
•
Is the voltage greater than 10 volts?
B8 CHECK CIRCUIT 3001 (P/O) 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 P/O wire.
resistance between BOB pin A2 and ground (BOB pin A33).
•
Is the resistance greater than 10,000 ohms?
B9 CHECK CIRCUIT 3001 (P/O) FOR OPEN
•
With key OFF, disconnect contactor box C1982 and measure the Yes = REPLACE the contactor
resistance of the P/O wire between pin 2 on contactor box C1982 and box.
BOB pin A2.
•
Is the resistance less than 5 ohms?
No = REPAIR the P/O wire.
(Continued)
2001 Ranger EV, 01/2001