Table of Contents
Advertisement
DIAGNOSTIC CHART
(California specification vehicles)
Check voltage between terminals VF1 and
E1 of check connector.
NG
(Voltage stays
at 0 V.)
Check harness or connector between ECU
and main oxygen sensor, ECU and check
connector.
Check each item found to be a possible
cause of problem.
Does malfunction disappear when a known
good main oxygen sensor is installed?
Replace ECU.
Check each item found to be a possible
cause of problem.
Replace ECU.
ENGINE TROUBLESHOOTING
–
Circuit Inspection
When code 25 is displayed, go to
step [ 3 ].
When code 26 is displayed, go to
step [ 5 ].
When codes 25 and 26 are
displayed, go to step [ 3 ].
When the voltage stays at 5 V,
go to step [ 5 ].
When needle fluctuates to less
than 8 times for every 10
seconds, replace main oxygen
sensor.
Repair or replace harness or
connector.
Repair or replace.
Replace main oxygen sensor.
Repair or replace.
TR–47
Hide quick links:
Advertisement
Table of Contents
