For 1990-2009 cars

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Instrument Cluster System Check? | -- | Go to Step 2 | Go to Instrument Cluster System Check
2 |

1. Install the scan tool.
2. Select SPECIAL FUNCTIONS from the INSTRUMENT CLUSTER menu.
3. Command the coolant temperature gauge from H to C.

Does the gauge respond when commanded?

--

Go to Step 3

Go to Step 4

3 |

1. Disconnect C105.
2. Turn ON the ignition switch.
3. Use a DMM in order to measure the voltage at terminal 11.

Is the voltage within the specified range?

B+

Go to Step 5

Go to Step 6

4 | Replace the instrument cluster. Refer to Instrument Cluster Replacement . Is the replacement complete? | -- | Go to Instrument Cluster System Check | --
5 | Inspect between terminal 11 of C105 and terminal 1 of C115 for an open circuit. Did you find and repair a circuit problem? | -- | Go to Step 8 | Go to Step 7
6 | Locate and repair an open circuit. Did you find and repair a circuit problem? | -- | Go to Step 8 | Go to Step 4
7 | Replace the engine coolant temperature gauge sensor. Is the replacement complete? | -- | Go to Step 8 | --
8 |

1. Connect all connectors and components that were removed in previous steps.
2. Verify that the coolant temperature gauge operates properly.

Does the coolant temperature gauge operate properly?

--

System OK

Go to Step 2