Nissan X-Trail 32. Manual — part 1006
P1642 THERMOPLUNGER CONTROL UNIT
EC-1153
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
NO
>> Repair or replace error-detected parts.
8.
CHECK THERMOPLUNGER
Check thermoplunger. Refer to
EC-1153, "Component Inspection"
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace malfunctioning thermoplunger.
Component Inspection
INFOID:0000000010935858
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
EC-1154
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P1643 THERMOPLUNGER CONTROL UNIT
P1643 THERMOPLUNGER CONTROL UNIT
DTC Description
INFOID:0000000010935859
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connectors (Thermoplunger control unit circuit is open or shorted.)
• Thermoplunger control unit
FAIL-SAFE
Stop thermoplunger control
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 2 seconds.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
EC-1154, "Diagnosis Procedure"
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
.
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010935860
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
P1643
THMPR 3 RLY C/CIR
(Thermoplunger 3 relay control circuit)
• 1.DEF: IMPLAUSIBLE SIGNAL
• CC.0:SHORT CIRCUIT TO EARTH
• CC.1: SHORT-CIRCUIT TO +12V
• CO: OPEN CIRCUIT
• ECM detects thermoplunger control unit circuit is open circuit.
• ECM detects thermoplunger control unit circuit is short circuit to ground.
• ECM detects thermoplunger control unit circuit is short circuit to battery.
P1643 THERMOPLUNGER CONTROL UNIT
EC-1155
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
C
D
E
F
G
H
I
J
K
L
M
A
EC
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
>> INSPECTION END
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.
+
-
Voltage
Thermoplunger control unit
Connector
Terminal
F141
4
Ground
Battery voltage
5
+
-
Continuity
ECM
Thermoplunger control unit
Connector
Terminal
Connector
Terminal
F117
46
F141
8
Existed
50
1
57
2
63
7
76
3
+
-
Continuity
ECM
Thermoplunger control unit
Connector
Terminal
Connector
Terminal
F117
46
F141
8
Existed
50
1
57
2
63
7
76
3
EC-1156
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P1643 THERMOPLUNGER CONTROL UNIT
NO
>> Repair or replace error-detected parts.
8.
CHECK THERMOPLUNGER
Check thermoplunger. Refer to
EC-1156, "Component Inspection"
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace malfunctioning thermoplunger.
Component Inspection
INFOID:0000000010935861
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
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