Ford Electric Ranger 2001 Manual page 651

414-03B-48
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST F: CHARGER LATCHUP FAULT
• With key OFF, disconnect traction battery charger C1991 and measure
the resistance of the LG/BK wire between pin 2 on traction battery
charger C1991 and BOB pin 55.
• Is the resistance less than 5 ohms?
F3 CHECK CIRCUIT 3800 (LG/BK) (OUTSIDE OF TRACTION
BATTERY SUPPORT TRAY) FOR SHORT TO GROUND
• With key OFF, measure the resistance between BOB pin 55 and ground
(BOB pin 65).
• Is the resistance greater than 10,000 ohms?
F4 CHECK CIRCUIT 3800 (LG/BK) (INSIDE OF TRACTION
BATTERY SUPPORT TRAY) FOR OPEN
• Disconnect the BOB from in-line C1939M, remove the traction battery,
and connect Traction Battery High-Voltage Lockout and Diagnostic Tool
to the traction battery high-voltage two-pin C3994M.
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 104-Pin Breakout Box (BOB) to traction battery support tray
in-line C1939F using Traction Battery Low-Voltage Service Cord; do not
connect Traction Battery Low-Voltage Service Cord to in-line C1939M.
• With key OFF, disconnect BCM C1987 and measure the resistance of the
LG/BK wire between pin 14 on BCM C1987 and BOB pin 55.
• Is the resistance less than 5 ohms?
F5 CHECK CIRCUIT 3800 (LG/BK) (INSIDE OF TRACTION
BATTERY SUPPORT TRAY) FOR SHORT TO GROUND
• With key OFF, measure the resistance between BOB pin 55 and ground
(BOB pin 65).
• Is the resistance greater than 10,000 ohms?
PINPOINT TEST G: CHARGER CYCLING FAULT
G1 CHECK FOR OTHER BATTERY CONTROL MODULE (BCM)
DIAGNOSTIC TROUBLE CODES (DTCs)
NOTE: If vehicle was recently in a hot temperature environment, allow
vehicle to cool down before proceeding.
• Connect the vehicle to a power control station (PCS) and press the
START button to begin charging.
• Wait approximately five minutes and retrieve continuous DTCs from the
BCM.
• Does DTC C1839 Leakage Fault occur along with DTC C1838
Charging System Fault?
High Voltage/Traction Battery — Nickel Metal Hydride
TEST STEP
TEST STEP
414-03B-48
ACTION TO TAKE
No = REPAIR the LG/BK wire.
Yes = GO to F4.
No = REPAIR the LG/BK wire.
Yes = GO to F5.
No = REPAIR the LG/BK wire.
Yes = REPLACE the traction
battery charger.
No = REPAIR the LG/BK wire.
ACTION TO TAKE
Yes = REFER to Current Leakage
Detection in this section.
No = If DTC C1838 does not
occur, system OK. If DTC
C1838 does occur, GO to
Pinpoint Test C and
REPEAT. If other charging
system faults are indicated
in Pinpoint Test C,
PERFORM the diagnostic
procedure for the other
faults. If no other charging
system faults occur,
REPLACE the traction
battery charger.
2001 Ranger EV, 01/2001