Ford Electric Ranger 2001 Manual page 660

414-03B-57
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST P: IOM TO BCM DIAGNOSTIC INPUT STUCK HIGH FAULT
— pins 37 and 16
• Are the resistances greater than 10,000 ohms?
P7 CHECK SIGNAL WIRES TO IOM BATTERY TEMPERATURE
SENSORS FOR SHORT(S) TO POWER
• With key ON, measure the voltage 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)
— pins 37 and 16
• Are any of the voltages greater than 0 volts?
P8 CHECK IOM BATTERY TEMPERATURE SENSORS
• With key OFF, measure the resistance between the terminals of the IOM
battery temperature sensors.
• Are the resistances between 430 and 280,000 ohms?
P9 CHECK ON-PLUG DETECT CIRCUIT 3404 (Y) FOR OPEN
• 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, measure the resistance of the Y wire between pin 30 on
IOM C1810 and BOB pin B12.
• Is the resistance less than 5 ohms?
P10 CHECK IOM TO BCM DIAGNOSTIC INPUT CIRCUIT 4008
(R/BK) FOR OPEN
• With key OFF, measure the resistance of the R/BK wire between pin 32
on IOM C1810 and BOB pin A36.
• Is the resistance less than 5 ohms?
P11 CHECK BCM TO IOM DIAGNOSTIC OUTPUT CIRCUIT 4007
(Y/LG) FOR SHORT TO GROUND
• With key OFF, measure the resistance between BOB pin B11 and ground Yes =
(BOB pin A33).
• Is the resistance greater than 10,000 ohms?
P12 CHECK IOM TO BCM DIAGNOSTIC INPUT CIRCUIT 4008
(R/BK) FOR SHORT TO POWER
• With key ON, measure the voltage between BOB pin A36 and ground
(BOB pin A33).
• Is the voltage greater than 0 volts?
P13 CHECK BATTERY TEMPERATURES AFTER STOP OF
CHARGING
(Continued)
High Voltage/Traction Battery — Nickel Metal Hydride
TEST STEP
414-03B-57
ACTION TO TAKE
Yes = REPAIR the wire(s) in
question.
GO to P8.
No =
Yes = GO to P9.
No = REPLACE the IOM battery
temperature sensor(s) in
question.
Yes = GO to P10.
No = REPAIR the Y wire.
Yes = GO to P11.
No = REPAIR the R/BK wire.
GO to P12.
No = REPAIR the Y/LG wire.
Yes = REPAIR the R/BK wire.
No = REPLACE the IOM.
2001 Ranger EV, 01/2001