*LOW COOLANT INDICATOR ALWAYS ON - DIESEL ONLY
For a complete wiring diagram Refer to Section 8W.
| Possible Causes |
| LOW COOLANT LEVEL SWITCH |
| (G18) LOW COOLANT FLUID LEVEL SENSE CIRCUIT SHORT TO GROUND |
| INSTRUMENT CLUSTER |
Diagnostic Test
1. LOW COOLANT LEVEL SWITCHNOTE: Ensure that the coolant is filled to the proper level before proceeding with this test.
Disconnect the Low Coolant Level Switch harness connector.
With the scan tool in Inputs/Outputs, read the Low Coolant Switch state.
Does the scan tool display: Closed?
Yes
- Go To2
No
- Replace the Low Coolant Switch in accordance with the Service Information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
2. (G18) LOW COOLANT FLUID LEVEL SENSE CIRCUIT SHORT TO GROUND
Turn the ignition off.
Disconnect the Low Coolant Level Switch harness connector.
Disconnect the Instrument Cluster harness connector.
Measure the resistance between ground and the (G18) Low Coolant Fluid Level Sense circuit.
Is the resistance below 5.0 ohms?
Yes
- Repair the (G18) Low Coolant Fluid Level Sense circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Replace and configure the Instrument Cluster in accordance with the Service Information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)