Nissan Qashqai J11. Manual - part 545

 

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Nissan Qashqai J11. Manual - part 545

 

 

EC9-336

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1641 THERMOPLUNGER CONTROL UNIT

P1641 THERMOPLUNGER CONTROL UNIT

DTC Logic

INFOID:0000000010309337

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 2 seconds.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC9-336, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010309338

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

F66

4

Ground

Battery voltage

5

P1641 THERMOPLUNGER CONTROL UNIT

EC9-337

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

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 

EC9-89,

"Reference Value"

.

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 

EC9-89, "Reference Value"

.

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 

EC9-338, "Component Inspection"

.

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

F82

46

F66

8

Existed

50

1

57

2

63

7

76

3

+

-

Continuity

ECM

Thermoplunger control unit

Connector

Terminal

Connector

Terminal

F82

46

F66

8

Existed

50

1

57

2

63

7

76

3

EC9-338

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1641 THERMOPLUNGER CONTROL UNIT

Component Inspection

INFOID:0000000010309339

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

P1642 THERMOPLUNGER CONTROL UNIT

EC9-339

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

P1642 THERMOPLUNGER CONTROL UNIT

DTC Logic

INFOID:0000000010309340

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 2 seconds.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC9-339, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010309341

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

F66

4

Ground

Battery voltage

5

 

 

 

 

 

 

 

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