2007 NISSAN TIIDA brake

P1572 ASCD BRAKE SWITCH
EC-935
< COMPONENT DIAGNOSIS >[MR18DE]
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With CONSULT-III
Select “BRAKE SW2” and check indication in “DATA MONITOR” mode.
Without CONSULT-III
Check the voltage between ECM harness connector terminal as follows.
Is the inspection result normal?
YES >> GO TO 16.
NO >> GO TO 11.
3.CHECK ASCD BRAKE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD cluch switch harness connector.
3. Turn ignition switch ON.
4. Check the voltage between ASCD cluch switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 4.
4.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 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors E7, M69 (LHD models)
 Harness connectors M201, M25 (RHD models)
 10A fuse (No.2)
 Harness for open or short between ASCD brake switch and fuse
Monitor item Condition Indication
BRAKE SW2 Brake pedalSlightly depressed ON
Fully released OFF
(+) (−)
Condition Voltage
Connector Terminal Connector Terminal
E1699
(Stop lamp switch signal)E108 108 Brake pedalSlightly depressed Approx. 0V
Fully released Battery voltage
ASCD Clutch switch
Ground Condition Voltage (V)
Connector Terminal
E35 (LHD models)
M206 (RHD models)1 Ground Brake pedalSlightly depressed Approx. 0
Fully released Battery voltage
ASCD brake switch
Ground Voltage
Connector Terminal
E36 (LHD models)
M205 (RHD models)1 Ground Battery voltage

EC-936
< COMPONENT DIAGNOSIS >[MR18DE]
P1572 ASCD BRAKE SWITCH
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check the continuity between ASCD brake switch harness connector and ASCD clutch switch harness
connector.
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK ASCD BRAKE SWITCH
Refer to EC-966, "
Component Inspection (ASCD Brake Switch)".
Is the inspection result normal?
YES >> GO TO 16.
NO >> Replace ASCD brake switch.
8.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 ECM harness connector and ASCD cluch switch harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 9.
9.DETECT MALFUNCTIONING PART
Check the following.
 Harness connector E7, M69, M201, M25 (RHD models)
 Harness for open or short between ECM and ASCD clutch switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
10.CHECK ASCD CLUTCH SWITCH
Refer to EC-966, "
Component Inspection (ASCD Clutch Switch)".
Is the inspection result normal?
YES >> GO TO 16.
NO >> Replace ASCD clutch switch.
11 .CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check the voltage between stop lamp switch harness connector and ground.
ASCD brake switch ASCD clutch switch
Continuity
Connector Terminal Connector Terminal
E36 (LHD models)
M205 (RHD models)2E35 (LHD models)
M206 (RHD models)1 Existed
ECM ASCD cluch switch
Continuity
Connector Terminal Connector Terminal
E16 100E35 (LHD models)
M206 (RHD models)2Existed

P1572 ASCD BRAKE SWITCH
EC-937
< COMPONENT DIAGNOSIS >[MR18DE]
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Is the inspection result normal?
YES >> GO TO 13.
NO >> GO TO 12.
12.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors M69, E7 (LHD models)
 Harness connectors M25, M201 (RHD models)
 10A fuse (No.7)
 Harness for open or short between stop lamp switch and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
13.CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check the continuity between ECM harness connector and stop lamp switch harness connector.
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 15.
NG >> GO TO 14.
14.DETECT MALFUNCTIONING PART
Check the following.
 Harness connector E7, M69, M201, M25 (RHD models)
 Harness for open or short between ECM and stop lamp switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
15.CHECK STOP LAMP SWITCH
Refer to EC-946, "
Component Inspection (Stop Lamp Switch)".
Is the inspection result normal?
YES >> GO TO 16.
NO >> Replace stop lamp switch.
16.CHECK INTERMITTENT INCIDENT
Refer to GI-55, "
Intermittent Incident".
>> INSPECTION END
Component Inspection (ASCD Brake Switch)INFOID:0000000001161916
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.
Stop lamp switch
Ground Voltage
Connector Terminal
E13 (LHD models)
M203 (RHD models)1 Ground Battery voltage
ECM Stop lamp switch
Continuity
Connector Terminal Connector Terminal
E16 99E13 (LHD models)
M203 (RHD models)2 Existed

EC-938
< COMPONENT DIAGNOSIS >[MR18DE]
P1572 ASCD BRAKE SWITCH
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK ASCD BRAKE SWITCH-II
1. Adjust ASCD brake switch installation. Refer to BR-6, "
Inspection and Adjustment".
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.
Component Inspection (ASCD Clutch Switch)INFOID:0000000001161917
1.CHECK ASCD CLUTCH SWITCH-I
1. Turn ignition switch OFF.
2. Disconnect ASCD clutch switch harness connector.
3. Check the continuity between ASCD clutch switch terminals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK ASCD CLUTCH SWITCH-II
1. Adjust ASCD clutch switch installation. Refer to CL-5, "
On-vehicle Inspection and Adjustment".
2. Check the continuity between ASCD clutch switch terminals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace ASCD clutch switch.
Component Inspection (Stop Lamp Switch)INFOID:0000000001161918
1.CHECK STOP LAMP SWITCH-I
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check the continuity between stop lamp switch terminals under the following conditions.
Terminals Condition Continuity
1 and 2 Brake pedalFully released Existed
Slightly depressed Not existed
Terminals Condition Continuity
1 and 2 Brake pedalFully released Existed
Slightly depressed Not existed
Terminals Condition Continuity
1 and 2 Clutch pedalFully released Existed
Slightly depressed Not existed
Terminals Condition Continuity
1 and 2 Clutch pedalFully released Existed
Slightly depressed Not existed

P1572 ASCD BRAKE SWITCH
EC-939
< COMPONENT DIAGNOSIS >[MR18DE]
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Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK STOP LAMP SWITCH-II
1. Adjust stop lamp switch installation. Refer to BR-6, "
Inspection and Adjustment".
2. Check the continuity between stop lamp switch terminals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace stop lamp switch.
Terminals Condition Continuity
1 and 2 Brake pedalFully released Not existed
Slightly depressed Existed
Terminals Condition Continuity
1 and 2 Brake pedalFully released Not existed
Slightly depressed Existed

P1805 BRAKE SWITCH
EC-945
< COMPONENT DIAGNOSIS >[MR18DE]
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P1805 BRAKE SWITCH
DescriptionINFOID:0000000001161929
Brake switch signal is applied to the ECM through the stop lamp switch when the brake pedal is depressed.
This signal is used mainly to decrease the engine speed when the vehicle is driving.
DTC LogicINFOID:0000000001161930
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the DTC with CONSULT-III.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-945, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000001161931
1.CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Check the stop lamp when depressing and releasing the brake pedal.
Is the inspection result normal?
YES >> GO TO 4
NO >> GO TO 2
2.CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check the voltage between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1805 Brake switchA brake switch signal is not sent to ECM for ex-
tremely long time while the vehicle is driving. Harness or connectors
(Stop lamp switch circuit is open or short-
ed.)
 Stop lamp switch
Brake pedal Stop lamp
Fully released Not illuminated
Slightly depressed Illuminated
Sto p l am p s w it ch
Ground Voltage
Connector Terminal
E13 (LHD models)
1 Ground Battery voltage
M203 (RHD models)

EC-946
< COMPONENT DIAGNOSIS >[MR18DE]
P1805 BRAKE SWITCH
Check the following.
 Harness connectors M69, E7 (LHD models)
 Harness connectors M201, M25 (RHD models)
 Harness for open or short between stop lamp switch and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check the continuity between ECM harness connector and stop lamp switch harness connector.
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 6.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
 Harness connectors M201, M25, M69, E7 (RHD models)
 Harness for open or short between ECM and stop lamp switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK STOP LAMP SWITCH
Refer to EC-946, "
Component Inspection (Stop Lamp Switch)".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace stop lamp switch.
7.CHECK INTERMITTENT INCIDENT
Refer to GI-55, "
Intermittent Incident".
>> INSPECTION END
Component Inspection (Stop Lamp Switch)INFOID:0000000001161932
1.CHECK STOP LAMP SWITCH-I
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check the continuity between stop lamp switch terminals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK STOP LAMP SWITCH-II
1. Adjust stop lamp switch installation. Refer to EC-946, "
Component Inspection (Stop Lamp Switch)".
ECM Stop lamp switch
Continuity
Connector Terminal Connector Terminal
E16 99E13 (LHD models)
2 Existed
M203 (RHD models)
Terminals Condition Continuity
1 and 2 Brake pedalFully released Not existed
Slightly depressed Existed

P1805 BRAKE SWITCH
EC-947
< COMPONENT DIAGNOSIS >[MR18DE]
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2. Check the continuity between stop lamp switch terminals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace stop lamp switch.
Terminals Condition Continuity
1 and 2 Brake pedalFully released Not existed
Slightly depressed Existed