Ford Electric Ranger 2001 Manual page 659

414-03B-56
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST P: IOM TO BCM DIAGNOSTIC INPUT STUCK HIGH FAULT
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 Low-Voltage Service Cord to traction battery
support tray in-line C1939F and in-line C1939M.
• Connect Traction Battery High-Voltage Service Cord to traction battery
support tray in-line C1935F and in-line C1935M.
• With key OFF, disconnect IOM C1810 and measure the voltage between
pin 29 (PK/BK wire) and pin 16 (BK wire) on IOM C1810.
• Is the voltage greater than 10 volts?
P4 CHECK GROUND TO IOM
• With key OFF, measure the resistance between pin 16 (BK/W wire) on
IOM C1810 and ground (BCM case).
• Is the resistance less than 5 ohms?
P5 CHECK WIRES TO IOM BATTERY TEMPERATURE SENSORS
FOR OPEN(S)
• Measure the resistance of the wires indicated below for the IOM battery
temperature sensors:
IOM Battery Temperature Sensor #1:
• With key OFF, disconnect IOM battery temperature sensor #1 C1803 and
measure the resistance of the LB wire between pin 35 on IOM C1810
and temperature sensor #1 C1803.
• With key OFF, measure the resistance of the O wire between pin 22 on
IOM C1810 and temperature sensor #1 C1803.
IOM Battery Temperature Sensor #2:
• With key OFF, disconnect IOM battery temperature sensor #2 C1804 and
measure the resistance of the LG wire between pin 36 on IOM C1810
and temperature sensor #2 C1804.
• With key OFF, measure the resistance of the W wire between pin 23 on
IOM C1810 and temperature sensor #2 C1804.
IOM Battery Temperature Sensor #3:
• With key OFF, disconnect IOM battery temperature sensor #3 C1805 and
measure the resistance of the P wire between pin 37 on IOM C1810 and
temperature sensor #3 C1805.
• With key OFF, measure the resistance of the BR wire between pin 24 on
IOM C1810 and temperature sensor #3 C1804.
• Are the resistances less than 5 ohms?
P6 CHECK SIGNAL WIRES TO IOM BATTERY TEMPERATURE
SENSORS FOR SHORT(S) TO GROUND
• With key OFF, measure the resistance between the pins on IOM C1810
indicated below for the IOM battery temperature sensor signal wires:
IOM Battery Temperature Sensor #1 (LB wire)
— pins 35 and 16
IOM Battery Temperature Sensor #2 (LG wire)
— pins 36 and 16
IOM Battery Temperature Sensor #3 (P wire)
(Continued)
High Voltage/Traction Battery — Nickel Metal Hydride
TEST STEP
414-03B-56
ACTION TO TAKE
No = GO to P4.
Yes = REPAIR the PK/BK wire
between IOM C1810 and
in-line C1939F.
No = REPAIR the BK/W wire.
GO to P6.
Yes =
No = REPAIR the wire(s) in
question.
Yes = GO to P7.
No = REPAIR the wire(s) in
question.
2001 Ranger EV, 01/2001