ENGINE CONTROLS 1F–115
DAEWOO M-150 BL2
DTC P1230 – Fuel Pump Relay Low Voltage
Step Action Value(s) Yes No
1
Perform an Euro On-Board Diagnostic (EOBD)
System Check.
Is the system check complete?
–
Go to Step 2
Go to
“On-Board
Diagnostic
System Check”
2
1. Turn the ignition switch to LOCK for 10 seconds.
2. Turn the Turn the ignition switch to ON.
3. Listen for in-tank fuel pump operation.
Does the fuel pump operate? 2.55 seconds
Go to
“Diagnostic
Aids”
Go to Step 3
3
1. Turn the Turn the ignition switch to ON.
2. Disconnect the fuel pump relay.
3. Connect a test light between the fuel pump relay
connector terminal 85 and ground.
4. Turn the Turn the ignition switch to ON.
Is the test light ON?
–
Go to Step 4 Go to Step 10
4
1. Turn the Turn the ignition switch to ON.
2. Disconnect the fuel pump relay.
3. Connect a test light between the fuel pump relay
connector terminal 66 and B+.
4. Turn the Turn the ignition switch to ON.
Is the test light ON?
–
Go to Step 5 Go to Step 9
5
1. Turn the ignition switch to LOCK.
2. Connect a test light between the fuel pump relay
connector terminal 30 and ground.
Is the test light ON?
–
Go to Step 6 Go to Step 8
6
Check for short to ground in the wire between the
fuel pump relay connector terminal 87 and fuel pump
connector.
Is the problem found?
–
Go to Step 7 Go to Step 8
7
1. Repair the wire between the fuel pump relay
connector terminal 87 and fuel pump connector
terminal 3.
2. Install the fuel pump relay.
3. Turn the engine OFF for 10 seconds.
4. Clear any DTCs from ECM.
5. Turn the ignition switch to ON.
Does the fuel pump operate? 2.55 seconds Go to Step 14
–
8
1. Replace the fuel pump relay.
2. Turn the ignition OFF for 10 seconds.
3. Clear any DTCs from ECM.
4. Turn the Turn the ignition switch to ON.
Does the fuel pump operate? 2.55 seconds Go to Step 14 Go to Step 9
9
Check for a short to ground wire between the fuel
pump relay connector terminal 66 and the ignition
after key ON 1(IGN 1).
Is the problem found?
–
Go to Step 11 Go to Step 10
10
Check for a short to ground wire between the fuel
pump relay connector terminal 85 and the ECM
connector terminal 10.
Is the problem found?
–
Go to Step 12 Go to Step 13
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