Engine Coolant Temperature Gauge Always Cold. Pontiac Sun Runner - 2WD (Canada) 1998

For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Instrument Cluster System Check? | -- | Go to Step 2 | Go to Instrument Cluster System Check

2

1. Disconnect the engine coolant temperature (ECT) sending unit connector.
2. Connect a J 36169-A fused jumper from connector cavity to chassis ground.

Does the ECT gauge indicate H?

--

Go to Step 3

Go to Step 4

3 | Replace the ECT sending unit. Is the repair complete? | -- | Go to Instrument Cluster System Check | --

4

1. Disconnect the instrument panel cluster assembly connector C1.
2. Connect a J 39200 digital multimeter from connector C1 cavity 5 to chassis ground.
3. Measure the resistance.

Is the resistance greater than the specified value?

3.0 ohms

Go to Step 5

Go to Step 6

5 | Repair the open in the YEL/WHT wire between the instrument panel cluster assembly and the ECT sending unit. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Instrument Cluster System Check | --
6 | Inspect the instrument panel cluster printed circuit for cracks and bad connections. Do any cracks or bad connections exist? | -- | Go to Step 7 | Go to Step 8
7 | Repair the cracks or bad connections in the instrument panel cluster printed circuit. Is the repair complete? | -- | Go to Instrument Cluster System Check | --
8 | Replace the ECT gauge. Is the repair complete? | -- | Go to Instrument Cluster System Check | --