RM3660EC _54 Brake _080740 PARKING BRAKE _0392901 ELECTRIC PARKING BRAKE SWITCH G

PARKING BRAKE  ELECTRIC PARKING BRAKE SWITCH  INSPECTION  


PROCEDURE

Hide 84390B 1.INSPECT ELECTRIC PARKING BRAKE SWITCH ASSEMBLY (for NR Series Engine)

a.

Check the resistance.

i.
C398938C10
2.177,0.26 1.979,0.26 1.979,0.26 1.979,1.031 true 1.958,1.365 2.167,1.833 true 2.646,0.677 2.49,0.677 2.49,0.677 2.156,1.042 true 2.146,1.354 2.688,1.76 true 2.594,1.792 3.208,1.99 0.615,0.198 10 false SWI1 2.042,1.854 2.667,2.052 0.625,0.198 10 false SWO1 2.729,0.594 3.344,0.792 0.615,0.198 10 false SWI2 2.25,0.188 2.865,0.385 0.615,0.198 10 false SWO2 0.115,0.135 0.427,0.333 0.313,0.198 10 false *a
*a Component without harness connected
(Electric Parking Brake Switch Assembly)


Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
7 (SWI1) - 8 (SWO1) OFF (Release) 100 kΩ or higher
ON (Lock) 10 Ω or less
Switch not operated 100 kΩ or higher
7 (SWI1) - 1 (SWI2) OFF (Release) 10 Ω or less
ON (Lock) 10 Ω or less
Switch not operated 100 kΩ or higher
7 (SWI1) - 2 (SWO2) OFF (Release) 10 Ω or less
ON (Lock) 100 kΩ or higher
Switch not operated 10 Ω or less
1 (SWI2) - 8 (SWO1) OFF (Release) 100 kΩ or higher
ON (Lock) 10 Ω or less
Switch not operated 10 Ω or less
1 (SWI2) - 2 (SWO2) OFF (Release) 10 Ω or less
ON (Lock) 100 kΩ or higher
Switch not operated 100 kΩ or higher


If the result is not as specified, replace the electric parking brake switch assembly.


ii.

Measure the resistance according to the value(s) in the table below.



b.

Check the Illumination.

i.
C398938C11
1.792,1.031 2.177,0.458 2.177,0.458 2.406,0.458 true 1.458,1.021 0.979,0.656 0.979,0.656 0.865,0.656 true 0.135,0.188 0.448,0.385 0.313,0.198 10 false *a 2.469,0.365 3.083,0.563 0.615,0.198 10 false IND+ 0.563,0.583 1.177,0.781 0.615,0.198 10 false IND-
*a Component without harness connected
(Electric Parking Brake Switch Assembly)


Apply battery voltage to the electric parking brake switch assembly and check that the switch illuminates.

OK:
Condition Specified Condition
Battery positive (+) → 3 (IND+)
Battery negative (-) → 5 (IND-) 		Illuminates


If the result is not as specified, replace the electric parking brake switch assembly.



Hide 84390B 2.INSPECT ELECTRIC PARKING BRAKE SWITCH ASSEMBLY (except NR Series Engine)

a.

Check the resistance.

i.
C398938C10
2.177,0.26 1.979,0.26 1.979,0.26 1.979,1.031 true 1.958,1.365 2.167,1.833 true 2.646,0.677 2.49,0.677 2.49,0.677 2.156,1.042 true 2.146,1.354 2.688,1.76 true 2.594,1.792 3.208,1.99 0.615,0.198 10 false SWI1 2.042,1.854 2.667,2.052 0.625,0.198 10 false SWO1 2.729,0.594 3.344,0.792 0.615,0.198 10 false SWI2 2.25,0.188 2.865,0.385 0.615,0.198 10 false SWO2 0.115,0.135 0.427,0.333 0.313,0.198 10 false *a
*a Component without harness connected
(Electric Parking Brake Switch Assembly)


Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
7 (SWI1) - 8 (SWO1) OFF (Release) 1 MΩ or higher
ON (Lock) 11.5 Ω or less
Switch not operated 1 MΩ or higher
7 (SWI1) - 2 (SWO2) OFF (Release) 11.5 Ω or less
ON (Lock) 1 MΩ or higher
Switch not operated 11.5 Ω or less
1 (SWI2) - 8 (SWO1) OFF (Release) 1 MΩ or higher
ON (Lock) 11.5 Ω or less
Switch not operated 11.5 Ω or less
1 (SWI2) - 2 (SWO2) OFF (Release) 11.5 Ω or less
ON (Lock) 1 MΩ or higher
Switch not operated 1 MΩ or higher


If the result is not as specified, replace the electric parking brake switch assembly.


ii.

Measure the resistance according to the value(s) in the table below.