Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Instrument Cluster Schematics Connector End View Reference: Cooling System Connector End Views DEFINITION: The low coolant indicator is always on when the key is in the ON position. | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | Check the engine coolant level. Is the engine coolant level low? | Go to Loss of Coolant | Go to Step 3 |
3 |
Does the low coolant indicator lamp turn ON and OFF with each command? | Go to Step 4 | Go to Step 5 |
4 |
Does the low coolant indicator turn OFF after bulb check? | Go to Step 10 | Go to Step 5 |
5 |
Does the voltage measure battery voltage? | Go to Step 9 | Go to Step 6 |
6 | Measure the voltage from the coolant level sensor signal circuit to a good ground. Refer to Circuit Testing in Wiring Systems. Does the voltage measure battery voltage? | Go to Step 8 | Go to Step 7 |
7 | Test the signal circuit of the coolant level switch for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 11 |
8 | Repair the open in the ground circuit of the coolant level switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 15 | -- |
9 | Inspect for poor connections at the harness connector of the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 13 |
10 | Inspect for poor connections at the harness connector of the coolant level switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 14 |
11 | Inspect for poor connections at the harness connector of the powertrain control module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 12 |
12 | Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the repair? | Go to Step 15 | -- |
13 | Replace the IPC. Refer to Instrument Cluster Replacement . Did you complete the repair? | Go to Step 15 | -- |
14 | Replace the coolant level switch. Refer to Radiator Surge Tank Replacement . Did you complete the replacement? | Go to Step 15 | -- |
15 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |