Gauge Assembly Replacement Coolant Temperature; Troubleshooting - Honda Civic Service Manual

Gauges
2.
3 .
Gauge Assembly Replacement
1 . Remove the instrument panel (see page 20-59),
t h e n r e m o v e t h e u p p e r c o l u m n c o v e r { s e e p a g e 1 7 -
P l a c e a c l e a n s h o p t o w e l ( A ) u n d e r t h e g a u g e
assembly to prevent scratching the steering
c o l u m n o r d a s h p a n e l .
Remove the screws from the gauge assembly (B).
Disconnect the connectors (C), and remove the
g a u g e a s s e m D r y .
I n s t a l l t h e g a u g e a s s e m b l y i n t h e r e v e r s e o r d e r o f
r e m o v a l .
Coolant Temperature Gauge
Troubleshooting
Before testing, check the No. I { 10A) fuse in the under-
hood fuse/relay box and the No. '10 (7.5A) fuse in the
under dash fuse/relay box.
1. Start the engine, and check the malfunction
i n d i c a t o r l a m p ( M l L ) .
Does the MIL come on?
YES- Troubleshoot the cause of the ECM DTC (see
p a g e 1 1 - 5 7 ) , a n d r e c h e c k .
NO-Go to step 2.
2. Check for a multiplex control unit DTC (see page
22,168).
ls a DTC ind icated?
YES Troubleshooting the cause of the multiplex
control unit DTC {see page 22-168), and recheck.
NO Go to step 3.
3 . D o t h e c o m m u n i c a t i o n l i n e c h e c k w i t h t h e s e l f -
diagnosis procedure (see page 22-56).
ls the word "Error" indicated on the odo/ttip
d isplay ?
YES The gauge cannot receive the signal from the
multiplex control unit and the ECI\,4. Check for an
open in the WHT/GRN wire (gauge connector
t e r m i n a l B 1 3 ) . l f n o o p e n i s f o u n d , g o t o s t e p 5 .
NO Go to step 4.
4. Do the gauge drive circuit check with the self-
d i a g n o s i s p r o c e d u r e ( s e e p a g e 2 2 - 5 6 ) .
Does the temperature gauge needle sweep lrom
the minimum position to the maximum, then tetutn
to the minimum position?
YES Go to step 5.
N O R e p l a c e t h e g a u g e a s s e m b l y . l
5. Substitute a known-good ECM and recheck.
Did the symptom/ ind ication go away?
Y E S R e p l a c e t h e E C M .
NO Substitute a known good gauge assembly. lf
the symptom/indication goes away, replace the
g a u g e a s s e m b l y . l
4.
22-64