Dtc P1231 Fuel Pump Relay High Voltage - Daewoo MATIZ Service Manual

Step
Perform an Euro On-Board Diagnostic (EOBD)
System Check.
1
Is the system check complete?
1. Turn the ignition switch to LOCK for 10 seconds.
2. Turn the Turn the ignition switch to ON.
2
3. Listen for in-tank fuel pump operation.
Does the fuel pump operate?
Check for short to battery voltage or low voltage in
the wire between the fuel pump relay connector
3
terminal 87 and fuel pump connector 3.
Is the problem found?
1. Repair the wire between the fuel pump relay
connector terminal 87 and fuel pump connector
terminal 3.
2. Install the fuel pump relay.
4
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?
1. Replace the fuel pump relay.
2. Turn the ignition OFF for 10 seconds.
5 3. Clear any DTCs from ECM.
4. Turn the Turn the ignition switch to ON.
Does the fuel pump operate?
Check for short to battery voltage wire between the
fuel pump relay connector terminal 66 and the
6
ignition after key ON 1(IGN 1).
Is the problem found?
Check for an open wire between the fuel pump relay
connector terminal 85 and the ECM connector
7
terminal 10.
Is the problem found?
1. Repair the wire between the fuel pump relay
connector terminal 66 and the ignition key ON
(IGN1).
2. Install the fuel pump relay.
8
3. Turn the ignition OFF for 10 seconds.
4. Clear any DTCs from ECM.
5. Turn the ignition switch to ON.
Does the fuel pump operate?
1. Repair the wire between the fuel pump relay
connector terminal 85 and the ECM connector
terminal 10.
2. Install the fuel pump relay.
9
3. Turn the ignition OFF for 10 seconds.
4. Clear any DTCs from ECM.
5. Turn the ignition switch to ON.
Does the fuel pump operate?
DAEWOO M-150 BL2
DTC P1231 – Fuel Pump Relay High Voltage
Action
ENGINE CONTROLS 1F – 119
Value(s) Yes
–
Go to Step 2
Go to
"Diagnostic
Aids"
2.55 seconds
–
Go to Step 7
2.55 seconds Go to Step 14
2.55 seconds Go to Step 11
–
Go to Step 8
–
Go to Step 9
2.55 seconds System OK
2.55 seconds System OK
No
Go to
"On-Board
Diagnostic
System Check"
Go to Step 3
Go to Step 5
–
Go to Step 6
Go to Step 7
Go to Step 10
Go to Step 13
Go to Step 10