Ford Electric Ranger 1998 Student Manual page 192

LESSON 5: DIAGNOSIS
5-28
High Voltage Auxiliary Load System Diagnosis
The high voltage auxiliary load system includes all the high voltage
components connected to the high voltage power distribution box
(HVPDB).
These components include:
•
the DC/DC converter (auxiliary battery charging).
•
the A/C inverter motor controller (air conditioning).
•
the positive temperature coefficient (PTC) switching module.
•
the power steering controller assembly.
The failure of any of these high voltage systems may be caused by a
component in the individual system or linked to the HVPDB.
•
The HVPDB is a fuse box that provides protection to these
systems.
•
Always determine if one system connected to the HVPDB has
failed or if multiple systems have failed.
•
This will help determine the cause of the concern. If more than one
system has failed, it may indicate a problem in the wiring or the
HVPDB itself.
•
If only one system has failed, a failed system component or an
HVPDB fuse may be the cause of the failure.
As with all Ranger EV diagnostics, follow the diagnostic procedures
in the workshop manual supplement.
•
Begin the diagnostic procedure by referring to Section 100-07.
•
This section will direct you to the correct procedure for the system
you are diagnosing.
•
Pinpoint tests must be performed exactly as written; do not
skip steps.
WARNING: STRICT ADHERENCE TO SAFETY
PROCEDURES IS MANDATORY WHEN
PERFORMING THESE TESTS. FAILURE TO DO SO
COULD RESULT IN SERIOUS PERSONAL INJURY
OR DEATH.
1998 Ranger EV New Model Training