Mazda 1990 323 Workshop Manual Supplement page 66

F
TRANSFER PUMP CONTROL SYSTEM
03UOFX-816
03UOFX-817
I
-.
03UOFX-81
03UOFX-819
4x4 CONTROL UNIT (FUEL PUMP CONTROL UNIT)
Inspection
1. Remove the 4x4 control unit.
-'
2. Disconnect the 4x4 control unit connector.
3. Check continuity between the 4x4 control unit connector
terminal M and a ground.
4. Perform the following inspection according to the continuity.
Continuity exists
1. Turn the ignition switch ON.
2. Ground the 4x4 control unit terminal M with a jumper wire
and verify that the voltage at the 4x4 control unit terminal
N is OV.
3. Remove the jumper wire and verify that the voltage at the
4x4 control unit terminal N is approx. 12V after approx.
10 sec..
.-
No continuity exists
1. Turn the ignition switch ON and verify that the voltage at
the 4x4 control unit terminal N is OV.
2. Disconnect the transfer pump connector.
3. Turn the ignition switch ON and verify that the voltage at
the 4x4 control unit terminal N is approx. 12V.
Replacement
1. Remove two bolts and remove the 4x4 control unit and the
bracket as an assembly.
2. Remove the 4x4 control unit from the bracket.
3. Install in the reverse order of removal.
03UOFX-820
F-12