Acura NSX 1991 Manual page 260

Main Menu
Fuel Supply System
Fuel Pump Relay
(From page 11-139)
Check for open in the fuel pump
relay:
1. Turn the ignition switch OFF.
2. Disconnect the ECM connec-
tor F (26P) from the ECM.
3. Disconnect the 4P connector
from the fuel pump relay.
4. Connect fuel pump relay con-
nector terminals No. 2 to No. 4.
5. Turn the ignition switch ON (II).
6. Measure voltage between
ECM connector terminal F4
and body ground.
Is there battery voltage?
Check for an open in the wire:
1. Remove the jumper wire.
2. Measure voltage between the
fuel pump relay connector ter-
minal No. 2 and body ground.
Is there battery voltage?
Repair open or short in wire
between ECM (F4) and the fuel
pump relay.
Table of Contents
CAUTION: * the "A" connector must be
disconnected for this test or the ECM
will be damaged.
Replace the fuel pump relay.
Repair open in wire between the
fuel pump relay and the No. 5
BACK-UP LIGHTS ALTERNATOR
TURN SIGNALS (15 A) fuse in the
under-dash fuse box).
FUEL PUMP RELAY 4P CONNECTOR
WIRE SIDE OF FEMALE TERMINALS
ECM CONNECTOR F (26P)
WIRE SIDE OF FEMALE TERMINALS