Nissan Altima HL32 Hybrid. Manual — part 342
EC-352
< COMPONENT DIAGNOSIS >
[QR25DE]
P1574 ASCD VEHICLE SPEED SENSOR
NO
>> Repair or replace.
2.
CHECK BARAKE ECU
>> INSPECTION END
![](/vehicles/gon/sttello/nita/youns.png)
P1805 BRAKE SWITCH
EC-353
< COMPONENT DIAGNOSIS >
[QR25DE]
C
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EC
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P1805 BRAKE SWITCH
Description
INFOID:0000000004211596
Brake switch signal is applied to the ECM and hybrid vehicle control ECU 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 Logic
INFOID:0000000004211597
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
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000004211598
1.
CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Check the stop lamp when depressing and releasing the brake pedal.
Is 1st trip DTC detected?
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.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1805
Brake switch
A 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
Stop lamp switch
Ground
Voltage
Connector
Terminal
E38
1
Ground
Battery voltage
JMBIA1639ZZ
![](/vehicles/gon/sttello/nita/sthundi.png)
EC-354
< COMPONENT DIAGNOSIS >
[QR25DE]
P1805 BRAKE SWITCH
3.
DETECT MALFUNCTIONING PART
Check the following.
• Fuse block (J/B) connector E6
• 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.
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.
NO
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
• Fuse block (J/B) connector E6
• 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
EC-354, "Component Inspection (Stop Lamp Switch)"
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace stop lamp switch.
7.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
>> INSPECTION END
Component Inspection (Stop Lamp Switch)
INFOID:0000000004363303
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.
ECM
Stop lamp switch
Continuity
Connector
Terminal
Connector
Terminal
E10
106
E38
2
Existed
Terminals
Condition
Continuity
1 and 2
Brake pedal
Fully released
Not existed
Slightly depressed
Existed
JMBIA1640ZZ
![](/vehicles/gon/sttello/nita/rod.png)
P1805 BRAKE SWITCH
EC-355
< COMPONENT DIAGNOSIS >
[QR25DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
2.
CHECK STOP LAMP SWITCH-II
1. Adjust stop lamp switch installation. Refer to
BR-12, "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 pedal
Fully released
Not existed
Slightly depressed
Existed
JMBIA1640ZZ
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