Ford ST1137-A, Руководство пользователя

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413-01-42 413-01-42 Instrument Cluster
DIAGNOSIS AND TESTING (Continued)
PINPOINT TEST X: THE BRAKE WARNING INDICATOR IS ALWAYS ON
Test Step Result / Action to Take
X1 CHECK THE BASE BRAKE SYSTEM
• Verify that the base brake system is operating correctly.
Yes
• Is the base brake system operating correctly? GO to X2 .
No
REFER to Section 206-00.
X2 CARRY OUT THE INSTRUMENT INDICATOR LAMP CONTROL
ACTIVE COMMAND USING THE SCAN TOOL
• Key in ON position.
• Enter the following diagnostic mode on the scan tool: Instrument
Cluster Active Command.
• Select the instrument cluster warning lamps and chime
Yes
command. Trigger the all lamps command on and off. Observe
GO to X3 .
the brake warning indicator.
• Does the brake warning indicator illuminate when
No
commanded on and turn off when commanded off? GO to X10 .
X3 CHECK THE BRAKE WARNING INDICATOR WITH THE
PARKING BRAKE SWITCH DISCONNECTED
• Disconnect: Parking Brake Switch C306.
Yes
• Monitor the brake warning indicator with the parking brake GO to X4 .
switch disconnected.
No
• Does the brake warning indicator continue to illuminate?
INSTALL a new parking brake switch.
TEST the system for normal operation.
X4 DETERMINE IF GENERIC ELECTRONIC MODULE (GEM) IS
RECEIVING THE CORRECT PARKING BRAKE INPUT
• Monitor GEM PID PRK BRK with the parking brake switch
Yes
disconnected. GO to X6 .
• Does the PID read OFF?
No
GO to X5 .
X5 CHECK CIRCUITS 128 (VT/YE) AND 22 (LB/BK) FOR A SHORT
TO GROUND
• Key in OFF position.
• Disconnect: GEM C201d.
• Measure the resistance between the GEM C201d pin 4, circuit
128 (VT/YE), harness side and ground.
Yes
GO to X9 .
No
REPAIR the circuit. TEST the system for
• Is the resistance greater than 10,000 ohms? normal operation.
X6 CHECK THE GEM OPERATION
• Key in OFF position.
Yes
• Disconnect: GEM C201e.
GO to X7 .
• Key in ON position.
• Monitor the brake warning indicator with the GEM disconnected.
No
• Does the brake warning indicator illuminate? GO to X9 .
(Continued)
2003 Mustang, 8/2002