Operation CHARM: Car repair manuals for everyone.
Home >> Nissan-Datsun >> 2012 >> Quest V6-3.5L (VQ35DE) >> Repair and Diagnosis >> Cruise Control >> Testing and Inspection >> ASCD Brake Switch
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

ASCD Brake Switch




ASCD BRAKE SWITCH

Component Function Check


1. CHECK ASCD BRAKE SWITCH FUNCTION

With CONSULT
1.Turn ignition switch ON.
2.Select "BRAKE SW-1" in "DATA MONITOR" mode with CONSULT.
3.Check "BRAKE SW-1" indication under the following conditions.





Without CONSULT
1.Turn ignition switch ON.
2.Check the voltage between ECM harness connector terminals.





Is the inspection result normal?
YES- INSPECTION END
NO- Proceed to .


Diagnosis Procedure


1. CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect ASCD brake switch harness connector.
3.Turn ignition switch ON.
4.Check the voltage between ASCD brake switch harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.

2. CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect fuse block (J/B) harness connector.
3.Check the continuity between ASCD brake switch harness connector and fuse block (J/B) harness connector.





Is the inspection result normal?
YES- Perform the trouble diagnosis for power supply circuit.
NO- Repair or replace error-detected parts.

3. CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check the continuity between ASCD brake switch harness connector and ECM harness connector.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 4.
NO- Repair open circuit, short to ground or short to power in harness or connectors.

4. CHECK ASCD BRAKE SWITCH

Check ASCD brake switch. .
Is the inspection result normal?
YES- Check intermittent incident. Intermittent Incident.
NO- Replace ASCD brake switch. Exploded View.


Component Inspection (ASCD Brake Switch)


1. CHECK ASCD BRAKE SWITCH-I

1.Turn ignition switch OFF.
2.Disconnect ASCD brake switch harness connector.
3.Check the continuity between ASCD brake switch terminals under the following conditions.





Is the inspection result normal?
YES- INSPECTION END
NO- GO TO 2.

2. CHECK ASCD BRAKE SWITCH-II

1.Adjust ASCD brake switch installation. Adjustments.
2.Check the continuity between ASCD brake switch terminals under the following conditions.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace ASCD brake switch. Exploded View.
pro multis · About Operation CHARM