Ford Mustang 2005 Workshop Manual page 38

2005 Mustang Workshop Manual
AC2 CHECK THE INPUT TO THE INSTRUMENT CLUSTER FOR DTC B1353
Ignition OFF.
Disconnect: Instrument Cluster C220.
Insert the ignition key into the ignition lock cylinder.
Measure the voltage between the instrument cluster C220-13, circuit 1414 (LG/VT), harness
side and ground.
Is the voltage greater than 10 volts?
AC3 CHECK CIRCUIT 1414 (LG/VT) FOR AN OPEN
Disconnect: Ignition Switch C250.
Measure the resistance between the instrument cluster C220-13, circuit 1414 (LG/VT), harness
side and the ignition switch C250-5, circuit 1414 (LG/VT), harness side.
Is the resistance less than 5 ohms?
AC4 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
Disconnect the instrument cluster connector.
Check for:
corrosion
pushed-out pins
Connect the instrument cluster connector and make sure it seats correctly.
Operate the system and verify the concern is still present.
Is the concern still present?
Pinpoint Test AD: The Chime Sounds When The Driver Door Is Ajar (No Key In The Ignition And The Headlamps Are Off)
Normal Operation
When the key is inserted into the ignition lock cylinder, the key-in-ignition switch (part of the ignition switch) closes and routes a voltage signal to the instrument cluster through circuit 1414
(LG/VT). The voltage signal indicates to the instrument cluster the key is inserted into the ignition lock cylinder. If the instrument cluster detects that the ignition switch is in the OFF or
ACC position with the key inserted in the ignition lock cylinder and the driver door is ajar, the key-in-ignition warning chime (located in the instrument cluster) sounds.
Possible Causes
circuit 1414 (LG/VT) short to voltage
key-in-ignition switch (part of the ignition switch)
instrument cluster
PINPOINT TEST AD: THE CHIME SOUNDS WHEN THE DRIVER DOOR IS AJAR (NO KEY IN THE IGNITION AND THE
HEADLAMPS ARE OFF)
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
AD1 CHECK THE INSTRUMENT CLUSTER ILLUMINATION
Check the operation of the instrument cluster illumination.
Does the instrument cluster illumination operate correctly?
AD2 CHECK THE INPUT TO THE INSTRUMENT CLUSTER
Ignition OFF.
Disconnect: Instrument Cluster C220.
Remove the ignition key from the ignition lock cylinder.
Measure the voltage between the instrument cluster C220-13, circuit 1414 (LG/VT),
harness side and ground.
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Test Step
Yes
GO to AC4.
No
GO to AC3.
Yes
INSTALL a new ignition lock cylinder. REFER to
the DTCs. REPEAT the self-test.
No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
Yes
INSTALL a new instrument cluster. REFER to
this section. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have
been caused by a loose or corroded connector. CLEAR the DTCs.
REPEAT the self-test.
Result / Action to Take
Yes
GO to AD2.
No
REFER to Section 413-00 to continue diagnosis of the instrument cluster
illumination.
Yes
GO to AD3.
No
GO to AD4.
Page 38 of 40
Section 501-14. CLEAR
Instrument Cluster (IC) in
11/14/2009