Pgm-Fi Main Relay - Acura 3.5 RL Manual

Fuel Supply System

PGM-FI Main Relay

Description
This PGM-FI main relay is located behind the dashboard
lower cover. The PGM-FI main relay actually contains
two individual relays. One relay is energized whenever
the ignition is on. It supplies battery voltage to the PCM,
power to the fuel injectors, and power for the second
relay. The second relay is energized for 2 seconds when
the ignition is switched on, and when the engine is run-
ning. It supplies power to the fuel pump.
PGM-FI
MAIN RELAY
FUEL PUMP
RESISTOR
FUEL PUMP
FUEL
PUMP
RELAY
Relay Testing
NOTE: If the engine starts and continues to run, the PGM-
FI main relay is OK.
1. Remove the PGM-FI main relay.
2. Attach the battery positive terminal to the No. 3*
terminal and the battery negative terminal to the
No. 2* terminal of the PGM-FI main relay. Then
check for continuity between the No. 5* terminal and
No. 2 terminal of the PGM-FI main relay.
• If there is continuity, go on to step 3.
• If there is no continuity, replace the relay and
retest.
To IGN. 1
To GROUND
To ST. SWITCH
To PCM CONNECTOR
TERMINAL A4
3. Attach the battery positive terminal to the No. 4 ter-
minal and the battery negative terminal to the No.
7* terminal of the PGM-FI main relay. Then check
that there is continuity between the No. 3 terminal
and No. 1 terminal of the PGM-FI main relay.
• If there is continuity, go on to step 4.
• If there is no continuity, replace the relay and
retest.
4. Attach the battery positive terminal to the No. 1 ter-
minal and battery negative terminal to the No. 2*
terminal of the PGM-FI main relay. Then check that
there is continuity between the No. 5* terminal and
No. 2 terminal of the PGM-FI main relay.
• If there is continuity, the relay is OK;
If the fuel pump still does not work, go to Harness
Testing on the next page.
• If there is no continuity, replace the relay and
retest.
*: 8P CONNECTOR
To BAT
To PCM
CONNECTOR TERMINALS
A13 and B1
To FUEL PUMP