Test W: The Low Coolant Level Indicator Is Never/Always On

PINPOINT TEST W: THE LOW COOLANT LEVEL INDICATOR IS NEVER/ALWAYS ON

W1-W3:

W3-W5:

W5-W8:

W9:

Normal Operation
The low coolant level switch is hardwired to the smart junction box (SJB) through circuit 794 (LB) and grounded through circuit 1205 (BK). The SJB monitors the coolant level and sends the coolant level data to the instrument cluster over the communication network.

DTC B2678 - sets when the SJB detects an open on the low coolant level input circuit. This DTC can only set when running the on-demand self-test.

Possible Causes
- Circuit 794 (LB) open or short to ground
- Circuit 1205 (BK) open
- Low coolant level switch
- SJB
- Instrument cluster