Contactor Box Diagnosis - Ford Electric Ranger 1998 Student Manual

1998 Ranger EV New Model Training

CONTACTOR BOX DIAGNOSIS

Contactor Box
•
Diagnostic trouble code (DTC) C1862 is associated with the
Contactor Box and its circuits.
•
The Contactor Box Assembly (CBA) is basically an on/off switch
for the traction battery.
•
The CBA contains the high voltage contactor relays, fuses, and
resistors.
– The components of the CBA are controlled by the BCM, TIM,
IAA, ignition switch, and Emergency Power Off (EPO) function.
•
The only replaceable components inside the CBA are the fuses.
– If any other component failure occurs the entire unit must
be replaced.
•
A critical concern in the CBA is the occurrence of an
uncommanded contactor relay closure, resulting in high voltage
power from the traction battery present outside of the traction
battery assembly with the driver key in the OFF position.
– This condition creates a hazardous situation and must be
corrected before further diagnosis or repair is attempted.
•
For complete diagnosis of the Contactor Box and circuits, refer to
Workshop Manual Supplement, Section 414-03.
LESSON 5: DIAGNOSIS
ER096-A
5-11