Ford Electric Ranger 2001 Manual page 661

414-03B-58
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST P: IOM TO BCM DIAGNOSTIC INPUT STUCK HIGH FAULT
NOTE: The IOM to BCM Diagnostic Signal Stuck High Fault is due to a
rapid increase of temperature over time. If any of the battery temperature
sensors indicate a temperature higher than 42°C (108°F), the BCM will
operate the flow-thru and recirculation fans and not allow charging until
the temperature falls below 42°C (108°F).
• Continue charging until the IOMH F PID indicates YES.
• With key ON, monitor BCM PIDs TMPSEN1, TMPSEN2, and
TMPSEN3.
• Are any of the temperatures 5°C (9°F) higher than the other two
temperature sensors?
P14 CHECK BATTERY MODULE CAPACITIES AFTER STOP OF
CHARGING
• Enter BCM active command mode BATTERY MODULE SELECT,
monitor BCM PID BAT MC, and record the module capacity values
for all 25 battery modules.
• Do battery modules 3, 12, or 18 indicate 15 amphours less than the
rest of the battery modules in the battery pack?
PINPOINT TEST Q: IOM TO BCM DIAGNOSTIC INPUT STUCK LOW FAULT
Q1 CHECK BATTERY CONTROL MODULE (BCM) TO
INDEPENDENT OBSERVER MODULE (IOM) DIAGNOSTIC
OUTPUT CIRCUIT 4007 (Y/LG) FOR OPEN
NOTE: If an IOM to BCM Diagnostic Input Stuck Low Fault occurs, the
12-volt auxiliary battery negative cable must be disconnected and
reconnected (power reset) to clear the latched fault from the BCM after the
concern is repaired. If the power reset is not carried out, the BCM will
not allow charging.
• 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 BCM C1986, C1987 using the
BCM/TIM BOB Adapter Cable and Overlay; leave the BCM
disconnected.
• With key OFF, disconnect independent observer module (IOM) C1810
and measure the resistance of the Y/LG wire between pin 31 on IOM
C1810 and BOB pin B11.
• Is the resistance less than 5 ohms?
Q2 CHECK IOM TO BCM DIAGNOSTIC INPUT CIRCUIT 4008
(R/BK) FOR SHORT TO GROUND
• With key OFF, measure the resistance between BOB pin A36 and ground Yes =
(BOB pin A33).
(Continued)
High Voltage/Traction Battery — Nickel Metal Hydride
TEST STEP
TEST STEP
414-03B-58
ACTION TO TAKE
Yes = If TMPSEN1 is higher,
REPLACE battery module
18. If TMPSEN2 is higher,
REPLACE battery module
12. If TMPSEN3 is higher,
REPLACE battery module
3.
No = GO to P14.
Yes = If capacity for battery
module 3 is less, REPLACE
battery module 3. If capacity
for battery module 12 is
less, REPLACE battery
module 12. If capacity for
battery module 18 is less,
REPLACE battery module
18.
No = REPLACE the BCM.
ACTION TO TAKE
GO to Q2.
Yes =
No = REPAIR the Y/LG wire.
GO to Q3.
2001 Ranger EV, 01/2001