PINPOINT TEST F: INCORRECT TEMPERATURE GAUGE INDICATION
Trigger the HEC active command OIL GAUGE. Scroll to 0%, 50%, and 100%.
Did the gauge display L at 0%, the middle of the gauge at 50%, and H at 100%.
Yes
GO to
E2
.
No
INSTALL a new instrument cluster; REFER to
Instrument Cluster
. CLEAR the DTCs. REPEAT the self-test.
E2
CHECK CIRCUIT 31 (WH/RD)
Instrument Cluster C251
Oil Pressure Switch C138
Measure the resistances between instrument cluster C251 Pin 16, Circuit 31 (WH/RD), harness side and oil
pressure switch C138, Circuit 31 (WH/RD), harness side; and between instrument cluster C251 Pin 16, Circuit
31 (WH/RD), harness side and ground.
Is the resistance less than 5 ohms between the instrument cluster and the oil pressure switch, and
greater than 10,000 ohms between the instrument cluster and ground?
Yes
INSTALL a new oil pressure switch. CLEAR the DTCs. REPEAT the self-test.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
CONDITIONS
DETAILS/RESULTS/ACTIONS
F1
CARRY OUT THE INSTRUMENT CLUSTER ENGINE COOLANT TEMPERATURE GAUGE ACTIVE COMMAND
NGS
Trigger instrument cluster active command ENGCOOLNT. Monitor the engine coolant temperature gauge while adjusting the ENGCOOLNT active
command to read 50% and 100%.
Does the temperature gauge start at cold, move to half at 50%, and full hot at 100%?
Yes
REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
Page 15 of 32
1999 Mustang Workshop Manual
1/18/2013
http://www.fordtechservice.dealerconnection.com/pubs/content/~WSXB/~MUS~LEN/20/...
