Toyota MR2 1988 Repair Manual page 249

EFI SYSTEM - Troubleshooting EFI Electronic Circuit with Volt/Ohmmeter
Fl-53
No.
Terminals Trouble Condition STD Voltage
Vc- E2
-
4- 6V
4 No voltage
IG S/W ON Measuring plate fully closed 4-6V
Vs- E2 Measuring plate fully open
0.02- 0.6
v
Idling
-
2- 4V
ECU
+B
(+81)
E2
E2
~
Vs
Vc
vs
vc
1
E1
-
Fl1269
CD •
vc -
E2,
vs -
E2
CD
No specified voltage at ECU terminals Vc or Vs and E2.
(IG S/W ON)
®
Check that there is voltage between ECU terminal +B or
+B 1 and body ground. (IG S/W ON)
Fl1252
OK
!NO
Refer to No. 1
(See page Fl-49)
Check wiring between ECU terminal E 1 and
body ground.
OK
!BAD
@Check air flow meter.
I I
Repair or replace.
BAD
iOK
Air Flow Meter@
Repair or replace Check wiring between ECU and
air flow meter. air flow meter.
!OK
!BAD
Try another ECU.
I I
Repair or replace.
c=::::::O:J
(See page Fl-94)
F11283