Acura NSX 1991 Manual page 264

Main Menu
Fuel Supply System
PGM-FI Main Relay
Troubleshooting
Engine will not start.
Inspection of PGM-FI main
relay and relay harness.
Check for an open in the wire:
1. Turn the ignition switch OFF.
2. Disconnect the PGM-FI main
relay 4P connector and 8P
connector.
3. Check for continuity between
the PGM-FI main relay 8P
connector terminal No. 7 and
body ground.
Is there continuity?
Check for an open or short in the
wire:
Measure voltage between the
PGM-FI main relay 4P connector
terminal No. 3 and body ground.
Is there battery voltage?
Check for an open or short in the
wire:
1. Turn the ignition switch ON (II).
2. Measure voltage between the
PGM-FI main relay 8P connec-
tor terminal No. 5 and body
ground.
Is there battery voltage?
(To page 11-145)
Table of Contents
Repair open in the wire between
the PGM-FI main relay and G101
(located at right middle of
engine).
Replace the ACG(S) (20 A)
fuse in the engine compart-
ment fuse/relay box.
Repair open or short in the
wire between the PGM-FI
main relay and the ACG(S)
(20 A) fuse.
Replace the No. 2 FUEL
PUMP, SRS 2 (15 A) fuse in
the under-dash fuse box.
Repair open or short in the
wire between the PGM-FI
main relay and the No. 2 FUEL
PUMP, SRS 2 (15 A) fuse.
PGM-FI MAIN RELAY 8P CONNECTOR
WIRE SIDE OF FEMALE TERMINALS
PGM-FI MAIN RELAY 4P CONNECTOR
WIRE SIDE OF FEMALE TERMINALS