DI±57
DIAGNOSTICS ± ENGINE
1
Check voltage between terminals HT1, HT2 of ECM connectors and body ground.
ON
HT1A
| HT1B |
A09084 | A09092 |
PREPARATION:
(a)Remove the ECM cover.
(b)Remove the 3 bolts from ECM.
(c)Turn the ignition switch ON.
CHECK:
Measure voltage between terminals HT1A, HT1B of ECM con- nectors and body ground.
HINT:
S Connect terminal HT1A to bank 1 sensor 1. S Connect terminal HT1B to bank 1 sensor 2.
OK:
Voltage: 9 ± 14 V
OK Check and replace ECM (See page IN±30).
NG
2 Check resistance of heated oxygen sensor heater (See page SF±70).
NG | Replace heated oxygen sensor. |
OK
Check and repair harness or connector between EFI main relay (Marking: EFI), heated oxygen sensor and ECM (See page IN±30).
2000 CELICA (RM744U)