Test Step 3. Disconnect the Coolant Level Sensor and Check the Supply Voltage (+5 VDC)

191

TM 9-2320-312-24-2

Troubleshooting Section

D. Turn the ignition key switch to the ON position.

Verify that the repair eliminates the problem. Clear

all diagnostic codes.

E. While the jumper wire is in place, access the

status screen that indicates the coolant level

STOP.

status.

Test Step 3. Disconnect the Coolant Level

Sensor and Check the Supply Voltage (+5

F. Wait for 30 seconds. Read the status and record

VDC)

the status.

G. Turn the ignition key switch to the OFF position.

A. Turn the ignition key switch to the OFF position.

Expected Result:

B. Disconnect the coolant level sensor from the

harness.

The coolant level status indicates "LOW" with the

jumper in place.

C. Use a multimeter to measure the voltage at the

harness connector from terminal C (+ 5 VDC) to

Results:

terminal B (AP sensor/switch sensor common).

Yes Leave the jumper wire in place. If a

D. Turn the ignition key switch to the ON position.

breakout T is installed, leave the breakout T in

place also. Proceed to Test Step 6.

Expected Result:

No Proceed to Test Step 7.

The measured voltage is between 4.5 VDC and 5.5

VDC.

Test Step 5. Disconnect the Terminal for

the Sensor Supply (+5 VDC) from the

Results:

ECM Connector

Yes Proceed to Test Step 4.

No Proceed to Test Step 5.

Test Step 4. Disconnect the Coolant

Level Sensor and Check the Coolant

Level Harness

g00756042

Illustration 54

g00651005

Illustration 53

Pin locations for the 4-pin sensor on the breakout T

Jumper wire

A. Turn the ignition key switch to the OFF position.

B. Disconnect the ECM vehicle harness connector

B. Disconnect the coolant level sensor from the

J1/P1.

harness.

C. Install a breakout T between ECM vehicle

C. Use a jumper wire in order to connect terminal

harness connector J1 and vehicle harness

D (coolant level normal) to terminal B (AP

connector P1.

sensor/switch sensor common) at the harness

connector.

D. Turn the ignition key switch to the ON position.

Refer to Illustration 53.