Fuel Pump Relay - Mazda B-Series 1997 Workshop Manual

FUEL SYSTEM (FOR 2 . 3 ~ I 3 . 0 ~ 1 4 . 0 ~ )
FT
FUEL PUMP RELAY
If the fuel pump relay or circuit has an open or short, Diagnostic Trouble Code No. P0230, PO231 or
PO232 is output.
If the circuit is open, the engine will not start.
If the circuit is shorted, the fuel pump will operate whenever the ignition switch is ON.
5BUOF3-152
COIL
-
85 AND 86
COMMON
-
30
NO
-
87
NC
-
87A
Inspection
Operational check
Install the fuel pump relay and listen for clicking of the fuel
pump relay while cranking the engine.
4BUOF3-139
Continuity inspection
1. Measure resistance between pins 85 and 86 at the relay.
Specification:
40-1 20
ohms
0 1
2.
Measure resistance between pin 85 and both pins 30 and
MF1044-B 6BUOFT-207
87 of relay.
Specification: Greater than 10,000 ohms.
3.
Apply battery positive voltage (B+) a.nd check continuity
between terminals of the relay.
Specification:
B+ : Battery positive v ltag
I
Terminal 85-86
1
Terminal 30-87
I
r
B
+
applied
I
Yes
I
4.
If not as specified, replace the fuel pump relay.