Diagnosis Procedure
- CHECK DTC PRIORITY
If DTC P1572 is displayed with DTC P0605, first perform the confirmation procedure (trouble diagnosis) for DTC P0605.
Is DTC P0605 detected?
YES
Perform diagnosis for P0605. Refer to DTC Description .
NO
GO TO 2.
- CHECK OVERALL FUNCTION-I
With CONSULT
- Turn ignition switch ON.
- On CONSULT screen, select "ENGINE">>"Data Monitor">>"BRAKE SW1".
- Check "BRAKE SW1" indication under the following conditions.
Monitor item
Condition
Indication
BRAKE SW1
Brake pedal
Slightly depressed
OFF
Fully released
ON
Without CONSULT
- Turn ignition switch ON.
- Check the voltage between ECM harness connector terminals as per the following.
ECM
Condition
Voltage
(Approx.)
Connector
+
-
Terminal
E32
192
(Brake pedal position switch signal)
204
Brake pedal
Slightly depressed
0 V
Fully released
Battery voltage
Is the inspection result normal?
YES
GO TO 8.
NO
GO TO 3.
- CHECK BRAKE PEDAL POSITION SWITCH POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect brake pedal position switch harness connector.
- Turn ignition switch ON.
- Check the voltage between brake pedal position switch harness connector and ground.
+
-
Voltage
Brake pedal position switch
Connector
Terminal
E72
1
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 6.
NO
GO TO 4.
- CHECK BRAKE PEDAL POSITION SWITCH POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect fuse block (J/B) harness connector.
- Check the continuity between brake pedal position switch harness connector and fuse block (J/B) harness connector.
Brake pedal position switch
Fuse block (J/B)
Continuity
Connector
Terminal
Connector
Terminal
E72
1
E28
1M
Existed
- Also check harness for short to ground.
Is the inspection result normal?
YES
GO TO 5.
NO
Repair or replace error-detected parts.
- CHECK FUSE
Check that the following fuse is not blowing.
Location
Fuse No.
Capacity
Fuse block (J/B)
#30
10A
Is the fuse blown (open)?
YES
Replace the fuse after repairing the applicable circuit.
NO
Perform trouble diagnosis for power supply circuit.
- CHECK BRAKE PEDAL POSITION SWITCH INPUT SIGNAL CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between brake pedal position switch harness connector and ECM harness connector.
Brake pedal position switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
E72
2
E32
192
Existed
- Also check harness for short to power and short to ground.
Is the inspection result normal?
YES
GO TO 7.
NO
Repair or replace error-detected parts.
- CHECK BRAKE PEDAL POSITION SWITCH
Refer to Component Inspection (Brake Pedal Position Switch)
Is the inspection result normal?
YES
INSPECTION END
NO
Replace brake pedal position switch. Refer to Exploded View .
- CHECK OVERALL FUNCTION-II
- On CONSULT screen, select "ENGINE">>"Data Monitor">>"BRAKE SW2".
- Check indication under the following conditions.
Monitor item
Condition
Indication
BRAKE SW2
Brake pedal
Slightly depressed
OFF
Fully released
ON
Check the voltage between ECM harness connector terminals as per the following.
ECM
Condition
Voltage
(Approx.)
Connector
+
-
Terminal
E32
191
(Stop lamp switch signal)
204
Brake pedal
Slightly depressed
Battery voltage
Fully released
0 V
Is the inspection result normal?
YES
INSPECTION END
NO
GO TO 9.
- CHECK STOP LAMP SWITCH POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect stop lamp switch harness connector.
- Check the voltage between stop lamp switch harness connector and ground.
+
-
Voltage
Stop lamp switch
Connector
Terminal
E38
1
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 12.
NO
GO TO 10.
- CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect fuse block (J/B) harness connector.
- Check the continuity between brake pedal position switch harness connector and fuse block (J/B) harness connector.
Stop lamp switch
Fuse block (J/B)
Continuity
Connector
Terminal
Connector
Terminal
E38
1
E28
5M
Existed
- Also check harness for short to ground.
Is the inspection result normal?
YES
GO TO 11.
NO
Repair or replace error-detected parts.
- CHECK FUSE
Check that the following fuse is not blowing.
Location
Fuse No.
Capacity
Fuse block (J/B)
#10
10A
Is the fuse blown (open)?
YES
Replace the fuse after repairing the applicable circuit.
NO
Perform trouble diagnosis for power supply circuit.
- CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT
- Disconnect ECM harness connector.
- Check the continuity between stop lamp switch harness connector and ECM harness connector.
Stop lamp switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
E38
2
E32
191
Existed
- Also check harness for short to power and short to ground.
Is the inspection result normal?
YES
GO TO 13.
NO
Repair or replace error-detected parts.
- CHECK STOP LAMP SWITCH
Refer to Component Inspection (Stop Lamp Switch)
Is the inspection result normal?
YES
INSPECTION END
NO
Replace stop lamp switch. Refer to Exploded View .