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Y31EAOA
MPI SYSTEM
CHECKING (USING THE MULTI-USE TESTER)
1.
Turn OFF the ignition switch.
2.
Connect the multi-use tester to the diagnosis connector in
the fuse box.
3.
Connect the power-source terminal of the multi-use tester
to the cigarette lighter socket.
4.
Turn ON the ignition switch.
5.
Use the multi-use tester to make the various checks, and
repair if a problem is found.
NOTE
If the malfunction indicator light(engine-check light) illum-
inates while the checks are being made, check the self-di-
agnosis output.
6.
After repair, check once again to be sure the problem has
been corrected.
7.
Turn OFF the ignition switch.
8.
Disconnect the multi-use tester.
9.
Disconnect the battery terminals for 15 seconds or longer.
This erases the self-diagnosis code.
10. Restart the engine. Check (by a driving test and other means)
to
be sure that the problem has been corrected.
Cranking Check
Item No.: Multi-use tester code number
Check conditions
Test
Probable cause of malfunction
Check points
specification
(or action)
Battery voltage
o Ignition switch: ON
11-13 V
o Low battery voltage
o Service data
o Power not supplied to the engine con-
o Item NO.16
trol unit
1) Check the power-supply circuit.
2) Check the ignition switch.
31 Check the control relay.
o Malfunction of the engine control
unit ground circuit
31-44
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