Nissan Qashqai J11. Manual — part 444
ECK-336
< DTC/CIRCUIT DIAGNOSIS >
[K9K]
P1641 THERMOPLUNGER CONTROL UNIT
P1641 THERMOPLUNGER CONTROL UNIT
DTC Logic
INFOID:0000000010289989
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 1 minute before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON at least 5 seconds.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
ECK-336, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010289990
1.
CHECK ECM HARNESS CONNECTOR CONNECTION
1.
Turn ignition switch OFF.
2.
Check the ECM harness connector connection.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK THERMOPLUNGER CONTROL UNIT HARNESS CONNECTOR CONNECTION
Check the thermoplunger control unit harness connector connection.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK THERMOPLUNGER CONTROL UNIT POWER SUPPLY
Check the thermoplunger control unit power supply.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1641
THMPR 1 RLY C/CIR
(Thermoplunger 1 relay control
circuit)
• 1.DEF:IMPLAUSIBLE SIG-
NAL
• CC.0: SHORT CIRCUIT TO
EARTH
• CC.1: SHORT-CIRCUIT TO
+12V
• CO: OPEN CIRCUIT
• ECM detects thermoplunger control unit cir-
cuit is open circuit.
• ECM detects thermoplunger control unit cir-
cuit is short circuit to ground.
• ECM detects thermoplunger control unit cir-
cuit is short circuit to battery.
• Harness or connectors
(Thermoplunger control unit circuit
is open or shorted.)
• Thermoplunger control unit
+
-
Voltage
Thermoplunger control unit
Connector
Terminal
F71
4
Ground
Battery voltage
5
P1641 THERMOPLUNGER CONTROL UNIT
ECK-337
< DTC/CIRCUIT DIAGNOSIS >
[K9K]
C
D
E
F
G
H
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J
K
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M
A
ECK
N
P
O
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Perform trouble diagnosis for battery power supply circuit.
4.
CHECK THERMOPLUNGER CONTROL UNIT REFERENCE VALUE-1
Check the thermoplunger control unit reference value (thermoplunger control unit side). Refer to
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
CHECK THERMOPLUNGER CONTROL UNIT CIRCUIT-1
Check the thermoplunger control unit circuit for open and short.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Repair or replace error-detected parts.
6.
CHECK THERMOPLUNGER CONTROL UNIT REFERENCE VALUE-2
Check the thermoplunger control unit reference value (ECM side). Refer to
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 7.
7.
CHECK THERMOPLUNGER CONTROL UNIT CIRCUIT-2
Check the thermoplunger control unit circuit for open and short.
Is the inspection result normal?
YES
>> Replace thermoplunger control unit.
NO
>> Repair or replace error-detected parts.
8.
CHECK THERMOPLUNGER
Check thermoplunger. Refer to
ECK-338, "Component Inspection (Thermoplunger)"
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Replace malfunctioning thermoplunger.
+
-
Continuity
ECM
Thermoplunger control unit
Connector
Terminal
Connector
Terminal
F80
39
F71
8
Existed
44
1
63
2
F81
111
3
121
7
+
-
Continuity
ECM
Thermoplunger control unit
Connector
Terminal
Connector
Terminal
F80
39
F71
8
Existed
44
1
63
2
F81
111
3
121
7
ECK-338
< DTC/CIRCUIT DIAGNOSIS >
[K9K]
P1641 THERMOPLUNGER CONTROL UNIT
Component Inspection (Thermoplunger)
INFOID:0000000010289991
1.
CHECK THERMOPLUNGER
1.
Turn ignition switch OFF.
2.
Disconnect thermoplunger harness connector.
3.
Check the resistance between thermoplunger terminal and ground.
is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace thermoplunger.
+
-
Resistance
Thermoplunger
Terminal
1
Ground
608
±
61 m
Ω
P1642 THERMOPLUNGER CONTROL UNIT
ECK-339
< DTC/CIRCUIT DIAGNOSIS >
[K9K]
C
D
E
F
G
H
I
J
K
L
M
A
ECK
N
P
O
P1642 THERMOPLUNGER CONTROL UNIT
DTC Logic
INFOID:0000000010289992
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 1 minute before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON at least 1 second.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
ECK-339, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010514974
1.
CHECK ECM HARNESS CONNECTOR CONNECTION
1.
Turn ignition switch OFF.
2.
Check the ECM harness connector connection.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK THERMOPLUNGER CONTROL UNIT HARNESS CONNECTOR CONNECTION
Check the thermoplunger control unit harness connector connection.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK THERMOPLUNGER CONTROL UNIT POWER SUPPLY
Check the thermoplunger control unit power supply.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1642
THMPR 2 RLY C/CIR
(Thermoplunger 2 relay control
circuit)
• 1.DEF: IMPLAUSIBLE SIG-
NAL
• CC.0: SHORT CIRCUIT TO
EARTH
• CC.1: SHORT-CIRCUIT TO
+12V
• CO: OPEN CIRCUIT
• ECM detects thermoplunger control unit cir-
cuit is open circuit.
• ECM detects thermoplunger control unit cir-
cuit is short circuit to ground.
• ECM detects thermoplunger control unit cir-
cuit is short circuit to battery.
• Harness or connectors
(Thermoplunger control unit circuit
is open or shorted.)
• Thermoplunger control unit
+
-
Voltage
Thermoplunger control unit
Connector
Terminal
F71
4
Ground
Battery voltage
5
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