Ford Electric Ranger 2001 Manual page 612

414-03B-9
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST A: DTC C1862 CONTACTOR CIRCUIT FAILURE
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 Traction Battery High-Voltage Service Cord to traction battery
support tray in-line C1935F and in-line C1935M.
• 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.
• With key ON, measure the voltage between BOB pin 17 and ground
(BOB pin 65).
• Is the voltage greater than 0 volts?
A13 CHECK AUXILIARY CONTACTOR RELAY FEEDBACK
STATUS
• With key ON, monitor IAA module AUXCN I.
• Does the AUXCN I PID indicate ENABLED?
A14 CHECK AUXILIARY CONTACTOR RELAY STATUS SIGNAL
(OPEN FAULT)
• Connect 104-Pin Breakout Box (BOB) to IAA module and IAA module
C1945.
• Enter IAA module active command mode AUXILIARY SYSTEM
CONTROL, set the active command AUX CONT to CLOSE, and
measure the voltage between BOB pin 26 and ground (BOB pin 80).
• Is the voltage greater than 10 volts?
A15 CHECK AUXILIARY CONTACTOR RELAY CONTROL SIGNAL
(OPEN FAULT)
• Enter IAA module active command mode AUXILIARY SYSTEM
CONTROL, set the active command AUX CONT to CLOSE, and
measure the voltage between BOB pin 42 and ground (BOB pin 80).
• Is the voltage greater than 10 volts?
A16 CHECK CIRCUIT 3998 (GY) 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 42 and ground
(BOB pin 80).
• Is the resistance greater than 10,000 ohms?
A17 CHECK CIRCUIT 3998 (GY) BETWEEN IAA MODULE AND
TRACTION BATTERY SUPPORT TRAY FOR SHORT TO GROUND
• With key OFF, disconnect traction battery support tray in-line C1939.
• With key OFF, measure the resistance between BOB pin 42 and ground
(BOB pin 80).
• Is the resistance greater than 10,000 ohms?
A18 CHECK CIRCUITS 3998 (GY) AND 3999 (DB/LG) BETWEEN
IAA MODULE AND TRACTION BATTERY SUPPORT TRAY FOR
OPEN(S)
(Continued)
High Voltage/Traction Battery — Nickel Metal Hydride
TEST STEP ACTION TO TAKE
Yes = REPLACE the IAA module.
REFER to Section 412-04.
No = System OK. CHECK wiring
for intermittent connections.
Yes = System OK. CHECK wiring
for intermittent connections.
GO to A15.
No =
GO to A18.
Yes =
No = GO to A16.
Yes = REPLACE the IAA module.
REFER to Section 412-04.
No = GO to A17.
Yes = REMOVE the traction
battery and REPAIR the GY
wire between the contactor
box and in-line C1939F.
No = REPAIR the GY wire
between the IAA module
and in-line C1939M.
2001 Ranger EV, 01/2001
414-03B-9