Ford Electric Ranger 2001 Manual page 428

414-03A-25
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST A: DTC C1835 CURRENT SENSE CIRCUIT FAILURE
• With key OFF, measure the resistance of the DB wire between pin 15 on No =
contactor box C1982 and BOB pin A15.
• Are the resistances less than 5 ohms?
A10 CHECK CIRCUIT 3706 (DB) FOR SHORT TO GROUND
• With key OFF, measure the resistance between BOB pin A15 and ground Yes =
(BOB pin A33).
• Is the resistance greater than 10,000 ohms?
A11 CHECK CIRCUIT 3706 (DB) FOR SHORT TO POWER
• With key ON, measure the voltage between BOB pin A15 and ground
(BOB pin A33).
• Is the voltage greater than 0 volts?
A12 CHECK CURRENT SENSE CONTROL DISABLE SIGNAL
• 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 performing 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 Traction Battery Low-Voltage Service Cord to traction battery
support tray in-line C1939F and in-line C1939M.
• Connect 104-Pin Breakout Box (BOB) to BCM and BCM C1986, C1987
using the BCM/TIM BOB Adapter Cable and Overlay.
• Enter BCM active command mode BCM PACKETED COMMANDS, set
the active command CURRENT S to DISABLE, and measure the voltage
between BOB pin B22 and ground (BOB pin A33).
• Is the voltage greater than 7.5 volts?
A13 CHECK CURRENT SENSE CONTROL ENABLE SIGNAL
• Set the active command CURRENT S to ENABLE and measure the
voltage between BOB pin B22 and ground (BOB pin A33).
• Is the voltage less than 1 volt?
A14 CHECK CIRCUIT 3138 (LB/BK) FOR SHORT TO POWER
• With key OFF, disconnect the BOB from the BCM; leave BOB
connected to BCM C1986 and C1987.
• With key OFF, disconnect contactor box C1982.
• With key ON, measure the voltage between BOB pin B22 and ground
(BOB pin A33).
• Is the voltage greater than 0 volts?
A15 CHECK CONTACTOR BOX SIGNAL TO BCM
• With key OFF, disconnect the BOB from the BCM; leave BOB
connected to BCM C1986 and C1987.
• With key ON, measure the voltage between BOB pin B22 and ground
(BOB pin A33).
• Is the voltage between 7.5 and 9 volts?
A16 CHECK CIRCUIT 3138 (LB/BK) FOR OPEN
• With key OFF, disconnect contactor box C1982 and measure the
resistance of the LB/BK wire between pin 12 on contactor box C1982
and BOB pin B22.
(Continued)
High Voltage/Traction Battery
TEST STEP
414-03A-25
ACTION TO TAKE
REPAIR the wire(s) in
question.
GO to A11.
No = REPAIR the DB wire.
Yes = REPAIR the DB wire.
No = REPLACE the contactor
box.
GO to A13.
Yes =
No = GO to A15.
Yes = System OK. CHECK wiring
for intermittent connections.
GO to A14.
No =
Yes = REPAIR the LB/BK wire.
No = REPLACE the BCM.
Yes = REPLACE the BCM.
GO to A16.
No =
GO to A17.
Yes =
2001 Ranger EV, 01/2001