Ford ST1137-A, Manual

Page: 40 / 43

413-01-40 413-01-40 Instrument Cluster
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST V: THE INSTRUMENT CLUSTER IS INOPERATIVE (Continued)
Test Step Result / Action to Take
V4 CHECK GROUND CIRCUIT 397 (BK/WH) FOR AN OPEN
(Continued)
• Measure the resistance between the instrument cluster C220b
pin 20, circuit 397 (BK/WH), harness side and ground.
Yes
GO to V5 .
No
REPAIR the circuit. TEST the system for
• Is the resistance less than 5 ohms? normal operation.
V5 CHECK GROUND CIRCUIT 1205 (BK) FOR AN OPEN
• Measure the resistance between the instrument cluster C220b
pin 1, circuit 1205 (BK), harness side and ground.
Yes
GO to V6 .
No
REPAIR the circuit. TEST the system for
• Is the resistance less than 5 ohms? normal operation.
V6 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
• Disconnect all the instrument cluster connectors.
Yes
• Check for: INSTALL a new instrument cluster.
REFER to Instrument Cluster in this
• corrosion
section. TEST the system for normal
• pushed-out pins
operation.
• Connect all the instrument cluster connectors and make sure
they seat correctly.
No
• Operate the system and verify the concern is still present. The system is operating correctly at this
• Is the concern still present? time. The concern may have been caused
by a loose or corroded connector. CLEAR
the DTCs. REPEAT the self-test.
PINPOINT TEST W: NO COMMUNICATION WITH THE GENERIC ELECTRONIC MODULE (GEM)
CAUTION: Use the correct probe adapter(s) when making measurements. Failure
to use the correct probe adapter(s) may damage the connector.
Test Step Result / Action to Take
W1 CHECK THE GENERIC ELECTRONIC MODULE (GEM) POWER
SUPPLY
• Key in OFF position.
• Disconnect: Generic Electronic Module (GEM) C201a.
• Disconnect: GEM C201b.
(Continued)
2003 Mustang, 8/2002