Low Coolant Level

Coolant Level Circuit:

TEST CONDITION:

None.

FAILURE CONDITION:

Coolant level low for 5 seconds.

ACTION TAKEN:

Display the "Low Coolant Level" message on the CCDIC.

The coolant level module sends out an A/C 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 and 69 or shorted sensor.

^ No Message - open in circuit 750, 68, 69, 1033 or short to ground on circuit 750.