Mariner 4WD L4-2.5L (2010)
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B6 CARRY OUT A VOLTAGE DROP TEST ON THE GROUND CIRCUIT
NOTE: Be sure that there is some voltage drop when carrying out this step. There should always be some voltage drop on all circuits. A voltage reading
of 0 volts indicates that the test is being incorrectly carried out.
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Connect one fused jumper wire between the ABS module C155-16, circuit GD120 (BK/GN), harness side and the engine cooling fan C1074 pin 3,
component side.
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Connect the second fused jumper wire between the engine cooling fan C1074 pin 1, component side and the battery positive post.
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On Escape and Mariner, measure the voltage between the ABS module C155-16, circuit GD120 (BK/GN), harness side and the battery negative
post.
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On Hybrid, measure the voltage between the ABS module C155-16, circuit GD120 (BK/GN), harness side and the battery negative post.
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Is the voltage less than 0.2 volt?
Yes
For the Escape and Mariner, VERIFY ground G105 is securely tightened. GO to B8.
For Hybrid, VERIFY ground G110 is securely tightened. GO to B7.
No
REPAIR circuit GD120 (BK/GN) (Escape and Mariner) or GD179 BK/VT) (Hybrid) or the battery negative cable to body ground for high resistance.
TEST the system for normal operation.
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B7 CARRY OUT A VOLTAGE DROP TEST ON THE ABS MODULE GROUND CIRCUIT (HYBRID)
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Connect one fused jumper wire between the ABS module C155-47, circuit GD179 (BK/VT), harness side and the engine cooling fan C1074 pin 3,
component side.
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Connect the second fused jumper wire between the engine cooling fan C1074 pin 1, component side and the battery positive post.
-
NOTE: Be sure that there is some voltage drop when carrying out this step. There should always be some voltage drop on all circuits. A voltage
reading of 0 volts indicates that the test is being incorrectly carried out.
-
Measure the voltage between the ABS module C155-47, circuit GD179 (BK/VT), harness side and the battery negative post.
-
Is the voltage less than 0.2 volt?
Yes
VERIFY ground G112 is securely tightened. GO to B8.
No
REPAIR circuit GD179 (BK/VT) or the battery negative cable to body ground for high resistance. TEST the system for normal operation.
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B8 CHECK FOR CORRECT ABS MODULE OPERATION
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Disconnect the ABS module connector.
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Check for:
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corrosion
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damaged pins
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pushed-out pins
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Connect the ABS module connector and make sure it seats correctly.
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Operate the system and verify the concern is still present.
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Is the concern still present?
Yes
INSTALL a new ABS module. REFER to Antilock Brakes / Traction Control Systems. CLEAR the DTCs. REPEAT the network test with the scan tool.
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
network test with the scan tool.
