Ford Mustang 2005 Workshop Manual page 25

2005 Mustang Workshop Manual
Monitor the brake fluid level PID.
Connect a fused (10A) jumper wire between the brake fluid level switch C124-1, circuit 547 (LG/YE), harness side
and the brake fluid level switch C124-2, circuit 512 (TN/LG), harness side.
Does the PID indicate OK with the brake fluid level switch disconnected, and indicate low brake fluid level
when the jumper wire is in place?
K10 CHECK THE BRAKE FLUID LEVEL SWITCH PID USING THE DIAGNOSTIC TOOL
Enter the following diagnostic mode on the scan tool: SJB Brake Fluid Level PID.
Connect: Brake Fluid Level Switch C124.
Ignition ON.
NOTICE: Do not spill brake fluid onto painted or plastic surfaces. If spilled, wipe up immediately before
damage to the painted or plastic surface occurs.
Using a suitable tool, lightly push the brake fluid level float to the bottom of the reservoir. Monitor the SJB brake fluid
PID.
Does the PID indicate low fluid level with the brake fluid level float pushed down, and indicate normal with
the brake fluid level float released?
K11 CHECK CIRCUIT 512 (TN/LG) AND CIRCUIT 547 (LG/YE) FOR AN OPEN
Ignition OFF.
Disconnect: SJB C2280c.
Measure the resistance between the SJB C2280c-35, circuit 512 (TN/LG), harness side and the brake fluid level
switch C124-2, circuit 512 (TN/LG), harness side; and between the SJB C2280c-48, circuit 547 (LG/YE), harness
side and the brake fluid level switch C124-1, circuit 547 (LG/YE), harness side.
Are the resistances less than 5 ohms?
K12 CHECK CIRCUIT 512 (TN/LG) AND CIRCUIT 547 (LG/YE) FOR A SHORT TO GROUND
Measure the resistance between the SJB C2280c-35, circuit 512 (TN/LG), harness side and ground; and between the
SJB C2280c-48, circuit 547 (LG/YE), harness side and ground.
Are the resistances greater than 10,000 ohms?
K13 CHECK FOR CORRECT ANTI-LOCK BRAKE SYSTEM (ABS) MODULE OPERATION
Disconnect the ABS module connector.
Check for:
corrosion
pushed-out pins
Correct the ABS module connector and make sure it seats correctly.
Operate the system and verify that the concern is still present.
Is the concern still present?
K14 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
Disconnect all the instrument cluster connectors.
Check for:
corrosion
pushed-out pins
Connect all the instrument cluster connectors and make sure they seat correctly.
Operate the system and verify that the concern is still present.
Is the concern still present?
K15 CHECK FOR CORRECT SJB OPERATION
Disconnect all the SJB connectors.
Check for:
corrosion
pushed-out pins
Connect all the SJB connectors and make sure they seat correctly.
Operate the system and verify that the concern is still present.
Is the concern still present?
Pinpoint Test L: The Charging System Warning Indicator Is Never/Always On
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Page 25 of 40
REMOVE the jumper wire. GO to K11 .
Yes
GO to K13.
No
INSTALL a new brake fluid level switch. TEST the
system for normal operation.
Yes
GO to K12.
No
REPAIR the circuit in question. TEST the system
for normal operation.
Yes
GO to K15.
No
REPAIR the circuit in question. TEST the system
for normal operation.
Yes
INSTALL a new ABS module. REFER to Section
206-09. 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.
Yes
INSTALL a new instrument cluster. REFER to
Instrument Cluster (IC) in 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.
Yes
INSTALL a new SJB. REFER to Section 419-10.
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.
11/14/2009