1F–120 ENGINE CONTROLS
DAEWOO M-150 BL2
DTC P1231 – Fuel Pump Relay High Voltage (Cont’d)
Step Action Value(s) Yes No
10
1. Replace the ECM.
2. Turn the ignition OFF for 10 seconds.
3. Clear any DTCs from ECM.
4. Turn the ignition switch to ON.
Does the fuel pump operate? 2.55 seconds System OK Go to Step 11
11
1. Using the scan tool, clear the DTCs.
2. Start the engine and idle at normal operating
temperature.
3. Operate the vehicle within the conditions for
setting this DTC ad specified in the supporting
text.
Does the scan tool indicate that this diagnostic has
run and passed?
–
Go to Step 12 Go to Step 2
12
Check if any additional DTCs are set.
Are any DTCs displayed that have not been
diagnosed?
–
Go to
applicable DTC
table
System OK
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