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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? |