ENGINE COOLANT TEMPERATURE GAGE INACCURATE OR INOPERATIVE
Engine Coolant Temperature Gage Inaccurate or Inoperative
3
2. Use a voltmeter to check battery voltage
available at fuses F2, F23, and EF7.
Does the voltmeter indicate the value specified?
11-14 V
Go to Step 5 Go to Step 4
4Repair the open power supply circuit for the fuse.
Is the repair complete?-System OK-
5
Use a voltmeter to check the battery voltage
available at the clock connector terminal 5.
Does the voltmeter indicate the value specified?
11-14 V
Go to Step 7 Go to Step 6
6
Repair the open circuit between the clock
connector terminal 5 and the fuse F23.
Is the repair complete?
-
System OK-
7
Turn the ignition ON.
Is battery voltage available at the clock connector
terminal 15?
-
Go to Step 9 Go to Step 8
8
Repair the open circuit between terminal 15 of
the clock connector and fuse F2.
Is the repair complete?
-
System OK-
9
Inspect continuity between terminal 6 of the
clock connector and ground.
Does the multimeter indicate the value specified?
0 ohm
Go to Step 10 Go to Step 11
10Replace the clock.
Is the repair complete?-System OK-
11
Repair the open ground circuit between terminal
6, the clock connector, and ground G202.
Is the repair complete?
-
System OK-
StepActionValuesYesNo
1
Allow the engine to cool to room temperature.
With the ignition ON, does the temperature gage
always read at the high end of the scale?
-
Go to Step 7 Go to Step 2
2
Disconnect engine control module (ECM)
electrical connector.
Does the temperature gage indicator drop to the
low end of the scale?
-
-Go to Step 3
3
Inspect for a short to ground between the ECM
and the temperature gage.
Is there a short to ground?
-
Go to Step 4 Go to Step 5
4Repair the short to ground.
Is the repair complete?-System OK-
5Replace the temperature gage. -
2005 Chevrolet Aveo
2005 ACCESSORIES & EQUIPMENT Instrument Panel, Gages, & Console - Aveo
Microsoft
Friday, July 31, 2009 1:07:02 PMPage 31 © 2005 Mitchell Repair Information Company, LLC.
FUEL GAGE INACCURATE OR INOPERATIVE
Fuel Gage Inaccurate or Inoperative
Is the repair complete?System OK-
6
1. Disconnect the ECM.
2. Turn the ignition ON.
3. Check the voltage at the ECM.
Does the voltage equal the value specified?
11-14 V
Go to Step 9 Go to Step 7
7
Inspect for an open circuit between the ECM and
the temperature gage.
Is there an open circuit?
-
Go to Step 8 Go to Step 5
8
Repair the open circuit between the ECM and the
temperature gage.
Is the repair complete?
-
System OK-
9
1. Disconnect the ECM.
2. Connect a jumper wire between the ECM
connector and ground.
3. Turn the ignition ON.
Does the temperature gage move to the high end
of the scale?
-
-Go to Step 5
StepActionValuesYesNo
1
1. Connect a scan tool.
2. Check for engine control diagnostic trouble
codes (DTCs).
Are any DTCs set?
-
-Go to Step 2
2
1. Turn the ignition OFF.
2. Disconnect engine control module (ECM)
connector.
3. Remove the instrument cluster.
4. Inspect continuity between ECM fuel gage
control circuit terminal and the instrument
cluster terminal 1.
Does the ohmmeter indicate the specified value?
0 ohm
Go to Step 4 Go to Step 3
3
Repair the open circuit between the instrument
cluster connector terminal 1 and the ECM fuel
gage control circuit terminal.
Is the repair complete?
-
System OK-
2005 Chevrolet Aveo
2005 ACCESSORIES & EQUIPMENT Instrument Panel, Gages, & Console - Aveo
Microsoft
Friday, July 31, 2009 1:07:02 PMPage 32 © 2005 Mitchell Repair Information Company, LLC.
