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Gauges
Gauge Assembly Replacement
Coolant Temperature Gauge
~
~
Troubleshooting
1. Remove the instrument panellsee page 20-591,
then remove the upper column cover (see page 17-
91.
Before testing, check the No.9 11 OAI fuse in the under-
hood fuse/relay box and the No. 10 17.5AI fuse in the
2. Place a clean shop towellAI under the gauge
under-dash fuse/relay box.
assembly to prevent scratching the steering
column or dash panel.
1. Start the engine, and check the malfunction
indicator lamp IMILI.
3. Remove the screws from the gauge assembly IBI.
Does the MIL come on?
-<--
YES~
Troubleshoot the cause of the ECM DTC Isee
C
"
page 11-57), and recheck.
NO~Go
to step 2.
2. Check for a multiplex control unit DTC Isee page
22-1681.
Is
a
DTC indicated?
YES~
Troubleshooting the cause of the multiplex
control unit DTC Isee page 22-1681, and recheck.
NO~Go
to step 3.
3.
00 the communication line check with the self-
J
4.
Disconnect the connectors
(e),
and remove the
diagnosis procedure Isee page 22-561.
'-'
gauge assembly.
Is the word "Error" indicated on the ado/trip
5.
Install the gauge assembly in the reverse order of
display?
removal.
YES
The gauge cannot receive the signal from the
multiplex control un',t and the ECM. Check for an
open in the WHT/GRN wire Igauge connector
terminal B131. If no open is found, go to step 5.
NO~Go
to step 4.
4. Do the gauge drive circuit check with the self-
diagnosis procedure Isee page 22-561.
Does the temperature gauge needle sweep from
the minimum position to the maximum, then return
to the minimum position?
YES~Go
to step 5.
NO~Replace
the gauge assembly .•
5. Substitute a known-good ECM and recheck.
Did the symptom/indication go away?
YES~Replace
the ECM.
NO~Substitute
a known-good gauge assembly. If
the symptom/indication goes away, replace the
"-
til
gauge assembly .•
22-64
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Table of Contents
Troubleshooting
