Honda Acura NSX 1991 Service Manual page 210

-Troubleshooting Flowchart - Oxygen Sensor Heater (cont'd)
(From page 1 l-33)
Reconnect the 4P connector to
0 2
sensor.
Connect the ECU test harness
"A" connector to the engine
wire harness only, not the ECU.
(page 11-21)
Turn the ignition switch ON.
Measure voltage between A10
Is there battery voltage?
Y E S
Substitute a known-good ECU
and recheck. If symptomlindica-
tlon goes away. replace the
original ECU.
II-34
N O Repair open in ELK or
tween ECU (A101 and
front 02 sensor.