ENGINE CONTROLS 1F–37
DAEWOO M-150 BL2
Fuel Pump Relay Circuit Check (Cont’d)
Step Action Value(s) Yes No
3
1. Check for an open circuit between fuel pump test
connector and ground G401, and repair as
needed.
2. Check for the fuel cut-off switch and reset or
replace the fuel cut off switch.
Is the repair complete?
–
System OK Go to Step 4
4
1. Turn the ignition OFF.
2. Disconnect the fuel pump relay.
3. Connect a test light between the fuel pump relay
connector terminal 66 and battery positive.
4. Turn the ignition ON.
Is the test light on?
–
Go to Step 6 Go to Step 5
5
Check for an open circuit between terminal 66 of fuel
pump relay and battery positive and repair as
needed.
Is the repair complete?
–
System OK
–
6
1. Turn the ignition OFF.
2. Connect a test light between the fuel pump relay
connector terminal 85 and ground.
3. Turn the ignition ON.
Is the test light on? 2 sec Go to Step 8 Go to Step 7
7
Check for an open circuit between terminal 85 of fuel
pump relay and terminal 10 of ECM, and repair as
needed.
Is the repair complete?
–
System OK
–
8
1. Turn the ignition OFF.
2. Connect a test light between the fuel pump relay
connector terminal 30 and ground.
Is the test light on?
–
Go to Step 10 Go to Step 9
9
1. Check the fuse EF19, if blown, repair short circuit
between fuel pump relay 30 terminal.
2. Replace the fuse as needed.
3. Repair an open circuit as needed.
Is the repair complete?
–
System OK
–
10
1. Turn the ignition OFF.
2. Measure the resistance between following
terminals:
D Terminal 87 of fuel pump relay and terminal 1
of the fuel cut-off switch(or terminal 1 of
connector C201).
Does the resistance within the value specified. 0 Ω Go to Step 12 Go to Step 11
11
Repair an open circuit as needed.
Is the repair complete?
–
System OK
–
12
Replace the fuel pump relay.
Is the repair complete?
–
System OK Go to Step 13
13
Replace the ECM.
Is the repair complete?
–
System OK
–
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