Honda Acura NSX 1991 Service Manual page 910

Troubleshooting
Self-diagnosis indicator light D comes on: Indicates a problem in the coolant temperature sensor circuit. Use a
digital multimeter (KS-AHM-32-003)
The coolant temperature sensor is a temperature dependent resistor Wiermistor).
decreases as the coolant temperature increases.
Problem in the coolant tempera-
ture sensor circuit.
I
Disconnect the 2-P connector
Measure resistance between the
Is there 5 - 30 kg?
Y E S
Turn the ignition switch ON.
Measure voltage between LT BLU
wire (+ ) terminal in the other half
of the connector and body
ground.
Is there approx. 5 V?
\
I
Y E S
Measure voltage between LT BLU
wire (+ ) terminal and BLK/GRN
wire (- ) terminal.
To page 22-23
22-22
to check it.
Turn the ignition switch OFF.
I
(page 22-84). Leave the wire con-
To page 22-23
The resistance of the thermister