Ford Electric Ranger 2001 Manual page 614

414-03B-11
DIAGNOSIS AND TESTING (Continued)
Main/Precharge Contactor Relay
Control
Diagnostic Trouble Code (DTC) Definition
The following DTCs relate to the contactor box
relays that are controlled by the traction inverter
module (TIM):
• DTC B1676 Battery Pack Voltage Out of Range
— The TIM monitors the traction battery voltage
at its high-voltage input terminals. The TIM
receives high-voltage power when the
contactor box main contactor relay closes. The
TIM closes the main contactor relay after the
precharge sequence is complete and the
ignition key is turned to the START position
with the gear selector in the P (Park) or N
(Neutral) position. The TIM sets DTC B1676
when it detects the traction battery voltage is
less than 50 volts or greater than 385 volts
after the contactor box main contactor relay
has been commanded closed. If this occurs,
the TIM will shut down preventing the motor
from being enabled and the malfunction
indicator lamp (MIL) will illuminate.
Symptom Chart
Symptom Chart
Condition
DTC B1676 Battery Pack
•
Voltage Out of Range
DTC C1862 Contactor Circuit
•
Failure
High Voltage/Traction Battery — Nickel Metal Hydride
Possible Sources
Contactor box.
•
Circuit(s).
•
Traction inverter module
•
(TIM).
Low voltage TIM fuses:
•
— 9 (10A)
— 11 (7.5A)
— 24 (7.5A)
Traction battery high-voltage
•
fuse.
Circuit(s).
•
Traction inverter module
•
(TIM).
Contactor box.
•
• DTC C1862 Contactor Circuit Failure
— The TIM controls two contactor box relays,
the precharge and main contactor relays. There
are capacitors at the high-voltage input to the
TIM that are charged at a slow rate to a
high-voltage level when the precharge
contactor relay is closed. This prevents arcing
and damage to the main contactor relay if the
main contactor relay closes without precharge.
The TIM closes the precharge contactor relay
when the ignition key is turned to the ON
position. The TIM sets DTC C1862 if the
precharge sequence fails. If this occurs, the
TIM will shut down preventing the motor
from being enabled and the MIL will
illuminate. The TIM also performs a test to
determine if the main and/or precharge
contactor relays are welded. The TIM sets
DTC C1862 if welded contactor relay(s) have
been detected. If this occurs, the TIM will
allow the motor to be enabled and the MIL
will illuminate. The TIM will also send a SCP
message (main contactor relay welded/stuck
closed) to the Battery Control Module (BCM)
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.
GO to Pinpoint Test A.
•
GO to Pinpoint Test B.
•
414-03B-11
Action
2001 Ranger EV, 01/2001