Pinpoint Test G542812p29: Primary Release Switch Circuit Fault

PINPOINT TEST G542812p29: PRIMARY RELEASE SWITCH CIRCUIT FAULT

G542812t125: CHECK THE PRIMARY RELEASE SWITCH SIGNAL CIRCUIT FOR SHORT CIRCUIT TO POWER

1. Key off. 2.





Electric parking brake module connector 1, CA265 disconnected. 3.





Electric parking brake module connector 2, CA266 disconnected. 4. Key on, engine off. 5. Measure the resistance between:





^ Is the resistance greater than 100 Kohms?

-> Yes
GO to Pinpoint Test G542812t135.

-> No
GO to Pinpoint Test G542812t141.

G542812t135: CHECK THE PRIMARY APPLY SWITCH SIGNAL CIRCUIT FOR SHORT CIRCUIT TO POWER

1. Measure the resistance between:





^ Is the resistance greater than 100 Kohms?

-> Yes
GO to Pinpoint Test G542812t136.

-> No
GO to Pinpoint Test G542812t142.

G542812t136: CHECK THE SECONDARY APPLY SWITCH SIGNAL CIRCUIT FOR SHORT CIRCUIT TO POWER

1. Measure the resistance between:





^ Is the resistance greater than 100 Kohms?

-> Yes
GO to Pinpoint Test G542812t137.

-> No
GO to Pinpoint Test G542812t143.

G542812t137: CHECK THE SECONDARY RELEASE SWITCH SIGNAL CIRCUIT FOR SHORT CIRCUIT TO POWER

1. Measure the resistance between:





^ Is the resistance greater than 100 Kohms?

-> Yes
GO to Pinpoint Test G542812t138.

-> No
GO to Pinpoint Test G542812t144.

G542812t138: CHECK THE PRIMARY RELEASE SWITCH SIGNAL CIRCUIT FOR HIGH RESISTANCE

1.





Electric parking brake switch connector, CA243 disconnected. 2. Measure the resistance between:





^ Is the resistance less than 10 ohms?

-> Yes
GO to Pinpoint Test G542812t139.

-> No
REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams.

G542812t139: CHECK THE APPLY SWITCH RETURN CIRCUIT FOR HIGH RESISTANCE

1. Measure the resistance between:





^ Is the resistance less than 10 ohms?

-> Yes
GO to Pinpoint Test G542812t140.

-> No
INSTALL a new parking brake switch.

G542812t140: CHECK THE SWITCH RESISTANCE

1. Measure the resistance between:





^ Is the resistance between 595 and 611 ohms?

-> Yes
An intermittent fault may be present in the wiring harness. Visually check for chaffed wires or other physical damage to the harness. If no fault is found in the circuit, suspect the following component(s): - EPB module - EPB module connector CA265 - EPB module connector CA266

-> No
INSTALL a new parking brake switch.

G542812t141: CHECK IF THE SHORT CIRCUIT IS IN THE HARNESS OR THE SWITCH

1.





Electric parking brake switch connector, CA243 disconnected. 2. Measure the resistance between:





^ Is the resistance greater than 100 Kohms?

-> Yes
INSTALL a new parking brake switch.

-> No
REPAIR the short circuit. For additional information, refer to the wiring diagrams.

G542812t142: CHECK IF THE SHORT CIRCUIT IS IN THE HARNESS OR THE SWITCH

1.





Electric parking brake switch connector, CA243 disconnected. 2. Measure the resistance between:





^ Is the resistance greater than 100 Kohms?

-> Yes
INSTALL a new parking brake switch.

-> No
REPAIR the short circuit. For additional information, refer to the wiring diagrams.

G542812t143: CHECK IF THE SHORT CIRCUIT IS IN THE HARNESS OR THE SWITCH

1.





Electric parking brake switch connector, CA243 disconnected. 2. Measure the resistance between:





^ Is the resistance greater than 100 Kohms?

-> Yes
INSTALL a new parking brake switch.

-> No
REPAIR the short circuit. For additional information, refer to the wiring diagrams.

G542812t144: CHECK IF THE SHORT CIRCUIT IS IN THE HARNESS OR THE SWITCH

1.





Electric parking brake switch connector, CA243 disconnected. 2. Measure the resistance between:





^ Is the resistance greater than 100 Kohms?

-> Yes
INSTALL a new parking brake switch.

-> No
REPAIR the short circuit. For additional information, refer to the wiring diagrams.