"Low Coolant Level" Message

TEST CONDITION(S)
None

FAILURE CONDITION(S)
1) Coolant level low for 5 seconds.

ACTION TAKEN
Display "Low Coolant Level" message on Computer Control Driver Information Center (CCDIC).

DESCRIPTION
The coolant level module sends out an AC signal to the coolant level probe. Based on the impedance it sees on circuit 68 to ground, it determines if the coolant level probe is submerged in coolant or not. if it determines the probe is not submerged in coolant, it grounds circuit 69 to indicate low coolant level to the BCM.

DIAGNOSIS
Condition Possible Causes
Erroneous Message short to ground on circuit 68, short to ground on circuit 69 or shorted sensor
No Message open in circuit 750, open in circuit 68, open in circuit 69, open in circuit 1033, or short to ground on circuit 750