5-88
3. EOP switch signal line short circuit check
-1. Turn the ignition switch OFF. Disconnect the EOP
switch 2P connector and the ECM connector A.
-2. Check for the continuity between the No.1 (Yellow/
Red) terminal of the EOP switch harness side 2P con-
nector and the body ground.
Is there the continuity?
YES –
Repair short in the wire between the EOP
switch and the ECM.
NO –
Perform “4. EOP switch ground line open cir-
cuit check”.
4. EOP switch ground line open circuit check
-1. Check for the continuity between the No.2 (Green/
Red) terminal of the EOP switch harness side 2P con-
nector and the body ground.
Is there the continuity?
YES –
Perform "5. EOP switch check".
NO –
Repair open in the wire between the EOP
switch and the ECM.
5. EOP switch check
-1. Turn the ignition switch OFF and connect each con-
nector.
-2. Turn the ignition switch ON and measure the voltage
between the test harness A-17 terminal (+) and the A-
2 terminal.
Is the voltage 0V (switch OFF)?
YES –
Substitute a known-good ECM and recheck.
NO –
Replace the EOP switch (high pressure side).
BF135A•BF150A
EOP SWITCH HARNESS SIDE 2P
CONNECTOR
VIEWED FROM THE TERMINAL SIDE
OPSHH
(YELLOW/RED)
EOP SWITCH HARNESS SIDE 2P
CONNECTOR
VIEWED FROM THE TERMINAL SIDE
SG2 (GREEN/RED)
A-2
A-17