
MPI –
Troubleshooting
13-54
INSPECTION PROCEDURE 46 <EVOLUTION-VI>
Check fuel pump circuit.
Measure at the fuel pump relay connector D-18.
D
Disconnect the connector and measure at the harness side.
D
Continuity between 1 and earth
OK: Continuity
NG
Check the following connector:
D-04
NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between fuel pump and earth, and repair
if necessary.
OK
Check the following connectors: A-123, B-64, D-18, D-32
NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between fuel pump and fuel pump relay
No.2 connector.
NG
Repair
OK
Replace the fuel pump.
INSPECTION PROCEDURE 47
Check the fuel pump drive control circuit.
NG
Check the harness wire between the fuel pump relay and engine-
ECU connector.
OK
Check trouble symptom.
OK
Check trouble symptom.
NG
Check the harness wire
between fuel pump relay
and ignition switch con-
nector.
NG
Repair
OK
Check the ignition switch. (Refer to GROUP 54.)
OK
Check trouble symptom.
NG
Replace the engine-ECU.
NG
Repair
OK
Check the following connector: B-59
OK
Measure at the engine-ECU connector B-59.
D
Disconnect the connector and measure at the harness side.
D
Voltage between 8 and earth (Ignition switch: ON)
OK: System voltage
NG
Measure at the fuel pump relay connector B-28.
D
Disconnect the connector and measure at the harness side.
D
Voltage between 3, 4 and earth (Ignition switch: ON)
OK: System voltage
NG
Check the following
connectors: B-65, B-76
NG
Repair
Check the following
connector: B-28
NG
Repair