Toyota ZZT230 series Repair Manual page 268

1
Check voltage between terminals HT1, HT2 of
ground.
)
2 Check resistance of heated oxygen sensor heater (See page
n d
a
Check
sensor and
)
DIAGNOSTICS
PREPARATI O N:
(a)
(b)
CHECK:
(c)
Measure voltage between terminals HT1 A, HT1 B of ECM con­
nectors and body ground.
HINT:
OK:
B C
G I
ness
(See page 1-).
or connector between
ENGINE
ECM
Remove the ECM cover.
Remove the 3 bolts from ECM.
Turn the ignition switch ON.
•
• Connect terminal HT1A to bank 1 sensor 1 .
Connect terminal HT1 B to bank 1 sensor 2.
9
- 14
Voltage: V
h
ec k and replace
Replace heated oxygen sen s or
EFI
main relay (Marking:
connectors and body
ECM
(See page 1�0).
SF-70).
.
EFI), heated oxygen
Dl-57