Acura NSX 1991 Manual page 265

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(From page 11-144)
Check for an open in the wire:
Measure voltage between the
PGM-FI main relay 4P connector
terminal No. 4 and body ground.
Is there battery voltage?
Check for an open or short in the
wire:
1. Turn the ignition switch to the
START (III) position.
NOTE:
• M/T: Clutch pedal must be
depressed.
• A/T: Transmission in
position.
2. Measure the voltage between
the PGM-FI main relay 8P con-
nector terminal No. 3 and
body ground.
Is there battery voltage?
Check for an open in the wire:
1. Turn the ignition switch OFF.
2. Disconnect the ECM connec-
tor A (26 P) from the ECM.
3. Check for continuity between
the PGM-FI main relay 8P
connector terminal No. 2 and
ECM connector terminal A4.
Is there continuity?
(To page 11-146)
Table of Contents
— Replace the IG COIL (30 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 IG COIL
(30 A) fuse.
— Replace the No. 7 STARTER
SIGNAL (7.5 A) fuse in the
under-dash fuse box.
— Repair open or short in the
wire between the PGM-FI
main relay and the No. 7
STARTER SIGNAL (7.5 A) fuse.
Repair open in the wire between
the ECM (A4) and the PGM-FI
main relay.
PGM-FI MAIN RELAY 4P CONNECTOR
WIRE SIDE OF FEMALE TERMINALS
PGM-FI MAIN RELAY 8P CONNECTOR
WIRE SIDE OF FEMALE TERMINALS
WIRE SIDE OF FEMALE TERMINALS