Pinpoint Test G542812p1: Primary Apply Switch Circuit Failure

Pinpoint Tests

PINPOINT TEST G542812p1: PRIMARY APPLY SWITCH CIRCUIT FAILURE

G542812t1: CHECK THE PRIMARY APPLY 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 connector disconnected. 4. Key on, engine off. 5. Measure the resistance between:





^ Is the resistance greater than 100 Kohms?

-> Yes
GO to Pinpoint Test G542812t2.

-> No
GO to Pinpoint Test G542812t8.

G542812t2: CHECK THE PRIMARY RELEASE SIGNAL CIRCUIT FOR SHORT CIRCUIT TO POWER

1. Measure the resistance between:





^ Is the resistance greater than 100 Kohms?

-> Yes
GO to Pinpoint Test G542812t3.

-> No
GO to Pinpoint Test G542812t9.

G542812t3: CHECK THE SECONDARY APPLY SIGNAL CIRCUIT FOR SHORT CIRCUIT TO POWER

1. Measure the resistance between:





^ Is the resistance greater than 100 Kohms?

-> Yes
GO to Pinpoint Test G542812t4.

-> No
GO to Pinpoint Test G542812t10.

G542812t4: CHECK THE SECONDARY RELEASE SIGNAL CIRCUIT FOR SHORT CIRCUIT TO POWER

1. Measure the resistance between:





^ Is the resistance greater than 100 Kohms?

-> Yes
GO to Pinpoint Test G542812t5.

-> No
GO to Pinpoint Test G542812t11.

G542812t5: CHECK THE PRIMARY APPLY SIGNAL CIRCUIT FOR OPEN CIRCUIT

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 G542812t6.

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

G542812t6: CHECK THE SWITCH RETURN CIRCUIT FOR OPEN CIRCUIT

1. Measure the resistance between:





^ Is the resistance less than 10 ohms?

-> Yes
GO to Pinpoint Test G542812t7.

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

G542812t7: CHECK THE ELECTRIC PARKING BRAKE SWITCH

1. Measure the resistance between:





^ Is the resistance between 595 ohms - 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 EPB switch.

G542812t8: CHECK IF THE SHORT CIRCUIT IS IN THE HARNESS OR THE SWITCH





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





^ Is the resistance greater than 100 Kohms?

-> Yes
INSTALL a new EPB switch.

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

G542812t9: CHECK IF THE SHORT CIRCUIT IS IN THE HARNESS OR THE SWITCH





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





^ Is the resistance greater than 100 Kohms?

-> Yes
INSTALL a new EPB switch.

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

G542812t10: CHECK IF THE SHORT CIRCUIT IS IN THE HARNESS OR THE SWITCH





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





^ Is the resistance greater than 100 Kohms?

-> Yes
INSTALL a new EPB switch.

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

G542812t11: CHECK IF THE SHORT CIRCUIT IS IN THE HARNESS OR THE SWITCH





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





^ Is the resistance greater than 100 Kohms?

-> Yes
INSTALL a new EPB switch.

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