ICC Brake Switch

DTC P1572 ICC BRAKE SWITCH




Component Description
When the brake pedal is depressed, ICC brake switch is turned OFF and stop lamp switch is turned ON. ECM detects the state of the brake pedal by this input of two kinds (ON/OFF signal).

Consult-II Reference Value In Data Monitor Mode:

On Board Diagnosis Logic:

On Board Diagnosis Logic

NOTE:
- If DTC P1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
- This diagnosis has the one trip detection logic.
- The MIL will not light up for this self-diagnosis.

DTC Confirmation Procedure

CAUTION: Always drive vehicle at a safe speed.

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 10 seconds before conducting the next test.

TESTING CONDITION:
steps 3 and 4 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it is unnecessary to lift the vehicle.

WITH CONSULT-II
1. Start engine.
2. Select "DATA MONITOR" mode with CONSULT-II.




3. Drive the vehicle for at least 5 consecutive seconds under the specified condition.
If DTC is detected, go to "Diagnostic Procedure".
If DTC is not detected, go to the following step.




4. Drive the vehicle for at least 5 consecutive seconds under the specified condition.
5. If DTC is detected, go to "Diagnostic Procedure".

WITH GST
Follow the procedure "WITH CONSULT-II" above.

EC-ICC/BS-01:

Wiring Diagram

Diagnostic Procedure Step 1:

Diagnostic Procedure Step 2 - 3:

Diagnostic Procedure Step 4 - 7:

Diagnostic Procedure Step 8 - 11:

Diagnostic Procedure Step 12 - 16:

Diagnostic Procedure

Component Inspection

ICC BRAKE SWITCH
1. Turn ignition switch "OFF".
2. Disconnect ICC brake switch harness connector.







3. Check continuity between ICC brake switch terminals 1 and 2 under the specified conditions.
If NG, adjust ICC brake switch installation and perform step 3 again.


STOP LAMP SWITCH
1. Turn ignition switch "OFF".
2. Disconnect stop lamp switch harness connector.







3. Check continuity between stop lamp switch terminals 1 and 2 under the specified conditions.
If NG, adjust stop lamp switch installation and perform step 3 again.


ICC BRAKE HOLD RELAY
1. Apply 12 V direct current between ICC brake hold relay terminals 1 and 2.







2. Check continuity between relay terminals 3 and 4, 6 and 7 under the specified conditions.
3. If NG, replace ICC brake hold relay.