Ox Sensor - Toyota 4-Runner 1985 Repair Manual

EFI SYSTEM - Electronic Control System
FI-69
SST
..
~
Service Connector
~ ~"'"
FI0579
Voltmeter
II
~
-
Ox Sensor
INSPECTION OF FEED BACK CONTROL
1 . CONNECT SST AND ANALOG VOLTMETER
Connect SST to the service connector and connect a volt-
meter to SST.
SST 09842-14010
Connect the (
+ )
testing probe to the red wire of the SST
and (-) testing probe to the black wire.
2. WARM-UP ENGINE TO NORMAL OPERATING
TEMPERATURE
3. CONNECT A TACHOMETER TO ENGINE
4. RACE ENGINE AT 2,500 RPM FOR ABOUT 90 SECONDS
5. MAINTAIN ENGINE SPEED AT 2,500 RPM
6. CHECK THAT NEEDLE OF VOLTMETER FLUCTUATES 8
TIMES OR MORE IN 10 SECONDS
7.
8.
9.
If not, inspect the EFI system and replace the Ox sensor,
if necessary.
STOP ENGINE
REMOVE VOLTMETER AND SST 09842-14010
INSTALL RUBBER CAP TO SERVICE CONNECTOR