Ford 2001 Ranger, Manual

Page: 819 / 1218

418-00-11 418-00-11 Module Communications Network
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST F: NO MODULE/NETWORK COMMUNICATION — SCP LINK
TEST STEP ACTION TO TAKE
•
With key OFF, reconnect in-line C1939 and disconnect BCM C1987. Yes = REPAIR the wire(s) in
question.
•
Connect 104-Pin Breakout Box (BOB) to IAA module C1945; leave IAA No = GO to F7.
module disconnected.
•
With key ON, measure the voltage between BOB pin 27 and ground
(BOB pin 80).
•
With key ON, measure the voltage between BOB pin 28 and ground
(BOB pin 80).
•
Are any of the voltages greater than 0 volts?
F7 CHECK CIRCUITS 914 (T/O) AND 915 (PK/LB) FOR SHORT(S)
TO GROUND
•
With key OFF, measure the resistance between BOB pin 27 and ground Yes = REPAIR the T/O wire
(BOB pin 80). between DLC C209 and
•
With key OFF, measure the resistance between BOB pin 28 and ground S2992 and/or the PK/LB
(BOB pin 80). wire between DLC C209
and S2990 for an open.
•
Are the resistances greater than 10,000 ohms?
No = REPAIR the wire(s) in
question.
PINPOINT TEST G: NO MODULE/NETWORK COMMUNICATION
TEST STEP ACTION TO TAKE
G1 CHECK NGS TESTER CONNECTOR AND DATA LINK
CONNECTOR (DLC) C209
•
With key OFF, disconnect NGS Tester. Inspect NGS terminals and DLC Yes = GO to G2.
C209 pins for damage.
•
Is everything OK?
No = REPAIR as necessary.
G2 CHECK FUSE, IGNITION POWER, AND GROUND TO DLC C209
•
Check 7.5A fuse 5 in the I/P fuse panel. Yes = REPAIR or REPLACE the
NGS Tester.
•
With key OFF, disconnect the NGS tester and measure the resistance No = REPAIR as necessary.
between pin 5 (BK/W wire) on DLC C209 and ground. (R < 5 ohms)
•
With key ON, measure the voltage between pin 16 (O wire) on DLC
C209 and ground. (V > 10 volts)
•
Are the values correct?
2001 Ranger EV, 01/2001