SYMPTOM RELATED DIAGNOSTICS

LOW COOLANT LEVEL (continued)

Test 5

Checking for voltage to the probe

1.Turn the ignition key to the OFF position.

2.Disconnect the J1A connector from the V-MAC II module.

3.Check for continuity from J1A connector pin F3 (the coolant level signal [+] line) to a good ground.

If there is continuity, locate and repair the short to ground in the wiring harness or connector. Retest to be sure the problem has been corrected.

If there is no continuity, proceed to Test 22.

1.Turn the ignition key to the OFF position.

2.Disconnect the harness from the coolant level sensor.

3.Turn the ignition key to the ON position.

4.Measure the voltage from pin A, on the harness end of the probe connector, to a good ground.

If the voltage is greater than 4 volts, replace the V-MAC II module. Retest to be sure the problem has been corrected.

If the voltage is less than 4 volts, proceed to Test 11.

Test 11

Checking for a short to ground

Test 22

Checking for a pin-to-pin short in the harness

1.Disconnect the J1B and J2 connectors from the V-MAC II module.

2.Check for continuity between J1A connector pin F3 (the coolant level signal [+] line) and each of the other pins (one at a time) on the J1A, J1B and J2 connectors.

If there is continuity with another pin, locate and repair the short in the wiring harness or connector. Retest to be sure the problem has been corrected.

If there is no continuity, visually inspect the J1A connector for dirt, corrosion, or foreign matter around pin F3. If no problem is found, replace the V-MAC II module. Retest to be sure the problem has been corrected.

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