Service Repair Manual

MPI SYSTEM
CHECKING (USING THE MULTI-USE TESTER)
1. Turn the ignition switch OFF.
2. Connect the harness connector of the multi-use tester to the
diagnostic connector in the fuse box.
3. Connect the power-source terminal of the multi-use tester
to the cigarette lighter socket.
4. Turn the ignition switch ON.
5. Use the multi-use- tester to make the system and sensor
checks.
NOTE
If the malfunction indicator light (engine-check light)
illuminates while the checks are being made, check the
self-diagnostic output.
6. After the repair, check again to be sure the problem has been
corrected.
7. Turn the ignition switch OFF.
8. Disconnect the multi-use tester.
9. Disconnect the battery negative terminal for 15 seconds or
longer. This erases the self-diagnostic code.
10. Restart the engine. Check (by a driving test and other means)
that the problem has been corrected.
NOTE
If a test is to be made during cranking, the power to the
cigarette lighter will be interrupted, therefore, use the
separate battery harness for the multi-use tester.
Cranking Cheek (should be performed when the engine fails to start, or before starting the engine)
Item No.: Multi-use tester code number
Check points
Check conditions
Battery voltage
o Service data
o Item No.16
o Ignition switch: ON
Test
specification
Probable cause of malfunction
11-13 v
o Low battery voltage
o Power not supplied to the electronic
control unit
1) Check the power-supply circuit.
2) Check the ignition switch.
3) Check the control relay.
o Malfunction of the electronic control
unit ground circuit
31-35