Ford 2001 Ranger, Manual

Page: 413 / 1218

414-03A-10 414-03A-10 High Voltage/Traction Battery
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST A: DTC C1862 CONTACTOR CIRCUIT FAILURE
TEST STEP ACTION TO TAKE
A23 CHECK CONTACTOR BOX HIGH-VOLTAGE FUSE
•
Remove the 40A AUX fuse from the contactor box. Refer to Contactor Yes = REPLACE the 40A AUX
Box Fuses Removal and Installation procedure in this section. fuse.
•
Measure the resistance of the 40A AUX fuse. No = REPLACE the contactor
•
Is the resistance greater than 1,000 ohms?
box.
•
DTC C1862 Contactor Circuit Failure
Main/Precharge Contactor Relay
Control
— The TIM controls two contactor box relays,
the precharge and main contactor relays. There
Diagnostic Trouble Code (DTC) Definitions
are capacitors at the high-voltage input to the
The following DTCs relate to the contactor box TIM that are charged at a slow rate to a
relays that are controlled by the traction inverter high-voltage level when the precharge
module (TIM): contactor relay is closed. This prevents arcing
and damage to the main contactor relay if the
•
DTC B1676 Battery Pack Voltage Out of Range
main contactor relay closes without precharge.
— The TIM monitors the traction battery voltage
The TIM closes the precharge contactor relay
at its high-voltage input terminals. The TIM
when the ignition key is turned to the ON
receives high-voltage power when the
position. The TIM sets DTC C1862 if the
contactor box main contactor closes. The TIM
precharge sequence fails. If this occurs, the
closes the main contactor after the precharge
TIM will shut down preventing the motor
sequence is complete and the ignition key is
from being enabled and the MIL will
turned to the START position with the gear
illuminate. The TIM also performs a test to
selector in the P (Park) or N (Neutral)
determine if the main and/or precharge
position. The TIM sets DTC B1676 when it
contactor relays are welded. The TIM sets
detects the traction battery voltage is less than
DTC C1862 if welded contactor relay(s) have
50 volts or greater than 385 volts after the
been detected. If this occurs, the TIM will
contactor box main contactor has been
allow the motor to be enabled and the MIL
commanded closed. If this occurs the TIM
will illuminate. The TIM will also send a SCP
will shut down, preventing the motor from
message (main contactor relay welded/stuck
being enabled and the malfunction indicator
closed) to the Battery Control Module (BCM)
lamp (MIL) will illuminate.
so the BCM will not allow charging.
Electrical Schematic
Refer to Electrical and Vacuum Troubleshooting
Manual, Cell 21, Contactor Box Relay Control for
schematic and connector information.
Inspection and Verification
Refer to Section 100-07 .
2001 Ranger EV, 01/2001