Ford Electric Ranger 2001 Manual page 412

414-03A-9
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST A: DTC C1862 CONTACTOR CIRCUIT FAILURE
A18 CHECK CIRCUITS 3998 (GY) AND 3999 (DB/LG) BETWEEN
IAA MODULE AND TRACTION BATTERY SUPPORT TRAY FOR
OPEN(S)
• With key OFF, disconnect traction battery support tray in-line C1939 and Yes =
measure the resistance of the GY wire between pin 16 on in-line
C1939M and BOB pin 42.
• With key OFF, measure the resistance of the DB/LG wire between pin
17 on in-line C1939M and BOB pin 26.
• Are the resistances less than 5 ohms?
A19 CHECK CIRCUIT 3999 (DB/LG) BETWEEN IAA MODULE AND
TRACTION BATTERY SUPPORT TRAY FOR SHORT TO GROUND
• Disconnect BOB from IAA module; leave BOB connected to IAA
module C1945.
• With key OFF, measure the resistance between BOB pin 26 and ground
(BOB pin 80).
• Is the resistance greater than 10,000 ohms?
A20 CHECK CIRCUITS 3998 (GY) AND 3999 (DB/LG) BETWEEN
CONTACTOR BOX AND TRACTION BATTERY SUPPORT TRAY
FOR OPEN(S)
• Disconnect BOB from IAA module C1945; do not reconnect IAA
module C1945.
• Remove the traction battery.
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.
• Connect 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 contactor box C1982 and measure the
resistance of the GY wire between pin 19 on contactor box C1982 and
BOB pin 16.
• With key OFF, measure the resistance of the DB/LG wire between pin 1
on contactor box C1982 and BOB pin 17.
• Are the resistances less than 5 ohms?
A21 CHECK CIRCUIT 3999 (DB/LG) BETWEEN CONTACTOR BOX
AND TRACTION BATTERY SUPPORT TRAY FOR SHORT TO
GROUND
• With key OFF, measure the resistance between BOB pin 17 and ground
(BOB pin 65).
• Is the resistance greater than 10,000 ohms?
A22 CHECK HIGH-VOLTAGE AUXILIARY POSITIVE BUS FOR
OPEN
• Disconnect power steering assembly high-voltage C1895.
• Measure the resistance between circuit 3140 (BK wire) on power steering No =
assembly C1895 and circuit 3132 (Y wire) on high-voltage auxiliary load
in-line C1935M.
• Is the resistance less than 5 ohms?
(Continued)
High Voltage/Traction Battery
TEST STEP ACTION TO TAKE
GO to A19.
No = REPAIR the wire(s) in
question.
GO to A20.
Yes =
No = REPAIR the DB/LG wire.
GO to A21.
Yes =
No = REPAIR the wire(s) in
question.
GO to A22.
Yes =
No = REPAIR the DB/LG wire.
GO to A23.
Yes =
REPLACE the HVPDB.
2001 Ranger EV, 01/2001
414-03A-9