ICC Brake Switch
DTC P1572 ICC BRAKE SWITCHComponent 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).
Refer to "DESCRIPTION" for the ICC function. Description and Operation
CONSULT-II Reference Value in Data Monitor Mode:
CONSULT-II Reference Value in Data Monitor Mode
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 given 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 given 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 (Steps 2 - 3):
Diagnostic Procedure (Steps 4 - 7):
Diagnostic Procedure (Steps 8 - 11):
Diagnostic Procedure (Steps 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 given conditions.
If NG, adjust ICC brake switch installation, refer to "BRAKE PEDAL", 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 given conditions.
If NG, adjust stop lamp switch installation, refer to "BRAKE PEDAL", 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 given conditions.
3. If NG, replace ICC brake hold relay.