Acura NSX 1997 Service Manual page 1320

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Coolant temperature gauge nee-
dle goes past the Hot mark.
1. Turn the ignition switch OFF.
2. Disconnect ECM connector A
(26P).
3. Turn the ignition switch ON
(II), and watch the coolant
temperature gauge.
Does the coolant temperature
gauge needle move correctly?
(you may have to watch it for
about 5 seconds.)
1. Turn the ignition switch OFF.
2. Turn the ignition switch ON
(II), and watch the coolant
temperature gauge again.
Does the coolant temperature
gauge needle immediately go
past the Hot mark?
Does the coolant temperature
gauge needle go past within
two to five seconds?
1. Turn the ignition switch OFF.
2. Disconnect the gauge assem-
bly connector A (30P).
3. Check for continuity between
ECM connector terminal A18
and gauge assembly connec-
tor terminal A12.
Is there continuity?
Repair short in the wire between
ECM connector terminal A18 and
gauge assembly connector ter-
minal A12.
Table of Contents
Substitute a known good ECM
and recheck. If the symptom/
indication goes away, replace
the original ECM.
Replace the coolant temperature
gauge.
Replace the coolant temperature
gauge.
Replace the coolant temperature
gauge.
ECM CONNECTOR A (26P)
GAUGE ASSEMBLY CONNECTOR A (30P)
Wire side of female terminals