Ford Electric Ranger 1998 Student Manual page 171

1998 Ranger EV New Model Training
•
The SCP network may remain operational even if one of the bus
wires is open or shorted (to ground or power). However, all data
may be corrupt and the network should be repaired prior to
performing diagnostics.
– The fault will be detected and a DTC will be set in the host
module (IAA).
•
The ISO 9141 network consists of a single wire, circuit 70.
– If the wire is open or shorted (to ground or power) diagnostic
communication between one or more of the modules will not
be possible.
Network Diagnosis
•
Before running any NGS diagnostics, perform the data link
diagnostic test.
– If a network concern exists, DTC(s) may be inaccurate.
•
To perform the diagnostic Data Link Diagnostic Test routine
(System Precheck) refer to the Ranger EV Workshop Manual,
Section 418-00.
– The System Precheck will direct you to the proper pinpoint test
or symptom chart, according to test results.
•
When network concerns are resolved normal diagnostic routines
may be continued if needed.
– It is possible that a network problem may be the cause of the
original concern.
•
For an electrical schematic, refer to the Electrical and Vacuum
Troubleshooting Manual (EVTM).
LESSON 5: DIAGNOSIS
5-7