Toyota Supra 1990 Manual page 232

FI-58
EFI SYSTEM - Troubleshooting with Volt/Ohmmeter (7M-GTE)
CD •
VC - Body ground
CD
There is no voltage between ECU terminals VC and body ground.
1 (lG SW ON)
Voltmeter
L.SCJ
o
CV
Check that there is voltage between ECU terminal +B (+B1) and
body ground.
(lG SW ON)
o
:I~==l,-....)
o
OK
~
NO
F13724
Refer to No.1.
(See page FI-54)
ECU
Voltmeter
~======~
®
Check wiring between ECU terminal E1 and body ground.
I
OK
~
BAD
Check wiring between ECU and air
Repair or replace.
flow meter.
FI2757
~
OK
~
BAD
ECU
L-_T_r_y_a_n_o_t_h_e_r_E_C_U_· _ _ _
---' 1 I
R epa i r or repl ace.
Ohmmeter
LJ~~!!;!!@1~~~~~~~~J
c::::n:::J
FI2755