Qashqai J11. Engine control system (R9M) - part 21

 

  Index      Nissan     Qashqai J11. Engine control system (R9M). Service and Repair Manual

 

Search            copyright infringement  

 

 

 

 

 

 

 

 

Content      ..     19      20      21      22     ..

 

 

Qashqai J11. Engine control system (R9M) - part 21

 

 

EC9-322

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1544 EGT SENSOR 2

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK EXHAUST GAS TEMPERATURE (EGT) SENSOR 2 POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between ECM harness connector and EGT sensor 2 harness connector.

4.

Also check harness for short to power and short to ground.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Repair or replace error-detected parts. And then GO TO 11.

5.

CHECK EXHAUST GAS TEMPERATURE (EGT) SENSOR 2 SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between ECM harness connector and EGT sensor 2 harness connector.

4.

Also check harness for short to power and short to ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace error-detected parts. And then GO TO 11.

6.

CHECK EXHAUST GAS TEMPERATURE SENSOR 2

Refer to 

EC9-323, "Component Inspection (DPF Upstream Temperature Sensor)"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace error-detected parts. And then GO TO 11.

7.

CHECK TC BOOST SENSOR ROUTING CIRCUIT

Refer to 

EC9-197, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace error-detected parts. And then GO TO 11.

8.

CHECK AIR FUEL RATIO (A/F) SENSOR ROUTING CIRCUIT

Refer to 

EC9-368, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 9.

+

Voltage

(Approx.)

EGT sensor 2

Connector

Terminal

F139

2

Ground

5 V

+

Continuity

ECM

EGT sensor 2

Connector

Terminal

Connector

Terminal

F83

105

F139

2

Existed

+

Continuity

ECM

EGT sensor 2

Connector

Terminal

Connector

Terminal

F83

109

F139

1

Existed

P1544 EGT SENSOR 2

EC9-323

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

NO

>> Replace error-detected parts. And then GO TO 11.

9.

CHECK EXHAUST ELECTRIC THROTTLE CONTROL ACTUATOR ROUTING CIRCUIT

Refer to 

EC9-286, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Replace error-detected parts. And then GO TO 11.

10.

CHECK FUEL INJECTOR ROUTING CIRCUIT

Refer to 

EC9-214, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Replace error-detected parts. And then GO TO 11.

11.

CHECK DIESEL PARTICULATE FILTER

Refer to 

EC9-359, "Component Inspection"

.

Is the inspection result normal?

YES-1 (Every inspection result are normal)>>Check intermittent incident. Refer to 

GI-41, "Intermittent Inci-

dent"

.

YES-2 (After repairing any malfunctioning part)>>INSPECTION END
NO

>> Replace diesel particulate filter.

Component Inspection (DPF Upstream Temperature Sensor)

INFOID:0000000010309312

1.

CHECK EXHAUST GAS TEMPERATURE (EGT) SENSOR 2

1.

Disconnect EGT sensor 2 harness connector.

2.

Check resistance between EGT sensor 2 terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace EGT sensor 2.

EGT sensor 2

Condition

Resistance

+

-

Terminal

2

1

Temperature

°

 C (

°

F)

20 (68)

89.309 – 159.795 k

EC9-324

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1546 EXHAUST GAS TEMPERATURE

P1546 EXHAUST GAS TEMPERATURE

DTC Logic

INFOID:0000000010309313

DTC DETECTION LOGIC

NOTE:
If DTC P1546 is displayed with following DTC, first perform the trouble diagnosis for following DTC.
Refer to 

EC9-108, "DTC Index"

.

• DTC P0001, P0002, P0101, P0190, P0200, P0201, P0202, P0203, P0204, P0627, P1453, P1544 and

P2002.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC P1546 can not duplicate.

>> Proceed to 

EC9-324, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010309314

1.

CHECK OTHER DTC

If DTC P1546 is displayed with other DTC, perform trouble diagnosis for other DTC.

>> INSPECTION END.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1546

TEMP. UPSTREAM OF PF
(Temperature upstream of 
particle filter)
• 1.DEF: EXCESSIVE TEM-

PERATURE

Diesel particulate filter temperature is more than 
1,200 

°

C (2,192 

°

F).

Diesel particulate filter

P1589 NEUTRAL SWITCH

EC9-325

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

P1589 NEUTRAL SWITCH

DTC Logic

INFOID:0000000010499334

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM COMPONENT FUNCTION CHECK

Perform component function check. Refer to 

EC9-325, "Component Function Check"

.

NOTE:
Use Component Function Check the overall function of the neutral position switch circuit. During this check,
the DTC might not be confirmed.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC9-326, "2WD : Diagnosis Procedure"

 (2WD models), 

EC9-327, "4WD : Diagnosis

Procedure"

 (4WD models).

Component Function Check

INFOID:0000000010505128

1.

PERFORM COMPONENT FUNCTION CHECK

With CONSULT

1.

Turn ignition switch ON.

2.

Select “MANUAL GEARBOX LEVER IN NEUTRAL” in “DATA MONITOR” mode of “ECM” using CON-
SULT.

3.

Check the “MANUAL GEARBOX LEVER IN NEUTRAL” indication as per the following conditions.

Without CONSULT

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connectors as per the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC9-326, "2WD : Diagnosis Procedure"

 (2WD models), 

EC9-327, "4WD : Diagnosis

Procedure"

 (4WD models).

2WD

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1589

GEAR BOX NEUTRAL CON-
TACTOR
(Gear box neutral contactor)
• 1.DEF: IMPLAUSIBLE 

SIGNAL

Neutral position switch signal remains ON for a 
long driving distance.

• Harness and connectors

(Neutral position switch circuit is 
shorted.)

• Neutral position switch

Selector lever position

Indication

Neutral position

DETECTED

Except above position

NOT DETECTED

+

Condition

Voltage

(Approx.)

ECM

Connector

Terminal

F82

80

Ground

Shift lever

Neutral

Battery voltage

Except above

0 V

EC9-326

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1589 NEUTRAL SWITCH

2WD : Diagnosis Procedure

INFOID:0000000010499335

1.

CHECK FUSE

Check that the following fuse is not fusing.

Is the fuse fusing?

YES

>> Replace the fuse after repairing the applicable circuit.

NO

>> GO TO 2.

2.

CHECK REVERSE/NEUTRAL POSITION SWITCH POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect reverse/neutral position switch harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between reverse/neutral position switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK REVERSE/NEUTRAL POSITION SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector.

3.

Check the continuity between reverse/neutral position switch harness connector and IPDM E/R harness
connector.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace error-detected parts.

4.

CHECK REVERSE/NEUTRAL POSITION INPUT SIGNAL CIRCUIT-1

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between reverse/neutral position switch harness connector and ECM harness con-
nector.

4.

Also check harness for short to ground.

Fuse No.

Capacity

#67

10 A

+

Voltage

(Approx.)

Reverse/Neutral position switch

Connector

Terminal

F100

2

Ground

Battery voltage

+

Continuity

Reverse/Neutral position 

switch

IPDM E/R

Connector

Terminal

Connector

Terminal

F100

2

F90

101

Existed

+

Continuity

Reverse/Neutral position 

switch

ECM

Connector

Terminal

Connector

Terminal

F100

3

F82

80

Existed

P1589 NEUTRAL SWITCH

EC9-327

< 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 5.

NO

>> Repair or replace error-detected parts.

5.

CHECK NEUTRAL POSITION INPUT SIGNAL CIRCUIT-2

1.

Disconnect IPDM E/R harness connector.

2.

Check the continuity between reverse/neutral position switch harness connector and IPDM E/R harness
connector.

3.

Also check harness for short to ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace error-detected parts.

6.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace reverse/Neutral position switch.

NO

>> Repair or replace error-detected parts.

4WD

4WD : Diagnosis Procedure

INFOID:0000000010505115

1.

CHECK FUSE

Check that the following fuse is not fusing.

Is the fuse fusing?

YES

>> Replace the fuse after repairing the applicable circuit.

NO

>> GO TO 2.

2.

CHECK NEUTRAL POSITION SWITCH POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect neutral position switch harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between neutral position switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK NEUTRAL POSITION SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector.

+

Continuity

Reverse/Neutral position 

switch

IPDM E/R

Connector

Terminal

Connector

Terminal

F100

3

F89

78

Existed

Fuse No.

Capacity

#67

10 A

+

Voltage

(Approx.)

Neutral position switch

Connector

Terminal

F159

2

Ground

Battery voltage

EC9-328

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1589 NEUTRAL SWITCH

3.

Check the continuity between neutral position switch harness connector and IPDM E/R harness connec-
tor.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace error-detected parts.

4.

CHECK NEUTRAL POSITION INPUT SIGNAL CIRCUIT-1

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between neutral position switch harness connector and ECM harness connector.

4.

Also check harness for short to ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

CHECK NEUTRAL POSITION INPUT SIGNAL CIRCUIT-2

1.

Disconnect IPDM E/R harness connector.

2.

Check the continuity between neutral position switch harness connector and IPDM E/R harness connec-
tor.

3.

Also check harness for short to ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace error-detected parts.

6.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace neutral position switch.

NO

>> Repair or replace error-detected parts.

+

Continuity

Neutral position switch

IPDM E/R

Connector

Terminal

Connector

Terminal

F159

2

F90

101

Existed

+

Continuity

Neutral position switch

ECM

Connector

Terminal

Connector

Terminal

F159

1

F82

80

Existed

+

Continuity

Neutral position switch

IPDM E/R

Connector

Terminal

Connector

Terminal

F159

2

F89

78

Existed

P158A CLUTCH SWITCH

EC9-329

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

P158A CLUTCH SWITCH

DTC Logic

INFOID:0000000010505194

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM COMPONENT FUNCTION CHECK

Perform component function check. Refer to 

EC9-329, "Component Function Check"

.

NOTE:
Use component function check to check the overall function of the clutch switch circuit. During this
check, a DTC might not be confirmed.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC9-329, "Diagnosis Procedure"

.

Component Function Check

INFOID:0000000010505195

1.

PERFORM COMPONENT FUNCTION CHECK

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC9-329, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010505196

1.

CHECK CLUTCH INTERLOCK SWITCH POWER SUPPLY

1.

Disconnect clutch interlock switch harness connector.

2.

Check the voltage between clutch interlock switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair open circuit or short to power in harness or connectors.

2.

CHECK CLUTCH INTERLOCK SWITCH INPUT SIGNAL CIRCUIT

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P158A

END STROKE CLUTCH 
CONTACTOR
(End stroke clutch contactor)
• 1.DEF: IMPLAUSIBLE SIG-

NAL

ECM detects clutch interlock switch malfunction.

• Harness and connectors
• Clutch interlock switch

+

Condition

Voltage

ECM

Connector

Terminal

E58

6

Ground

Clutch pedal

Fully released

Battery voltage

Fully depressed

Approx. 0 V

+

-

Voltage

Clutch interlock switch

Connector

Terminal

E52

1

Ground

Battery voltage

EC9-330

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P158A CLUTCH SWITCH

1.

Disconnect ECM harness connectors.

2.

Check the continuity between clutch interlock switch harness connector and ECM harness connector.

3.

Also check harness for short to ground and short to power. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

3.

CHECK CLUTCH INTERLOCK SWITCH

Refer to 

EC9-330, "Component Inspection (Clutch Pedal Position Switch)"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace clutch interlock switch.

4.

CHECK CLUTCH PEDAL POSITION SWITCH

Check clutch pedal position switch. Refer to 

EC9-273, "Component Function Check"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Repair or replace error-detected parts.

Component Inspection (Clutch Pedal Position Switch)

INFOID:0000000010505197

1.

CHECK CLUTCH INTERLOCK SWITCH-1

1.

Turn ignition switch OFF.

2.

Disconnect clutch interlock switch harness connector.

3.

Check the continuity between clutch interlock switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK CLUTCH INTERLOCK SWITCH-2

1.

Adjust clutch interlock switch installation.

2.

Check the continuity between clutch interlock switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace clutch interlock switch.

+

-

Continuity

Clutch interlock switch

ECM

Connector

Terminal

Connector

Terminal

E52

2

E58

6

Existed

Clutch interlock switch

Condition

Continuity

+

-

Terminal

1

2

Clutch pedal

Fully released

Existed

Slightly depressed

Not existed

Clutch interlock switch

Condition

Continuity

+

-

Terminal

1

2

Clutch pedal

Fully released

Existed

Slightly depressed

Not existed

P160C ECM

EC9-331

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

P160C ECM

DTC Logic

INFOID:0000000010309331

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 and wait at least 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC9-331, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010309332

1.

CHECK BATTERY TERMINALS

1.

Turn ignition switch ON.

2.

Turn ignition switch OFF and wait at least 1 minute.

3.

Check the battery terminals for damage and looseness.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair malfunction(s) and GO TO 2.

2.

CHECK OTHER DTC-1

1.

Turn ignition switch ON.

2.

Check DTC.

Is DTC P160C displayed with U0415, P0101, P0135, P0190, P0201, P0202, P0203, P0204, P0217, P0226,
P0471, P0544, P1544, P1620, P1650, P2002, P2080, P2243, P2244, P2263, P2626 or P2A06 displayed?

YES

>> Perform the trouble diagnosis for DTC U0415, P0101, P0135, P0190, P0201, P0202, P0203,

P0204, P0217, P0226, P0471, P0544, P1544, P1620, P1650, P2002, P2080, P2243, P2244,
P2263, P2626 or P2A06, and GO TO 3. Refer to 

EC9-108, "DTC Index"

.

NO

>> GO TO 3.

3.

CHECK DTC

1.

Turn ignition switch OFF and wait at least 1 minute.

2.

Turn ignition switch ON.

3.

Check DTC.

Is the DTC P160C displayed again?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

REPLACE ECM

1.

Replace ECM.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P160C

COMPUTER
(Computer)
• 1.DEF: —

ECM function is malfunctioning.

ECM

EC9-332

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P160C ECM

2.

Go to 

EC9-144, "Work Procedure"

.

>> INSPECTION END

5.

CHECK OTHER DTC-2

1.

Start engine and let it idle for at least 1 minutes.

2.

Check DTC.

Is the DTC U0415, P0101, P0135, P0190, P0201, P0202, P0203, P0204, P0217, P0226, P0471, P0544,
P1544, P1620, P1650, P2002, P2080, P2243, P2244, P2263, P2626 or P2A06 displayed?

YES

>> Perform the trouble diagnosis for DTC U0415, P0101, P0135, P0190, P0201, P0202, P0203,

P0204, P0217, P0226, P0471, P0544, P1544, P1620, P1650, P2002, P2080, P2243, P2244,
P2263, P2626 or P2A06, and GO TO 3. Refer to 

EC9-108, "DTC Index"

.

NO

>> GO TO 6.

6.

CHECK RESULT OF PROCEDURE 2

Check result of procedure 2.
Is result of procedure 2 “YES”?

YES

>> GO TO 7.

NO

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

7.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Select “DATA MONITOR” mode with CONSULT.

2.

Drive the vehicle for at least 15 minutes at 0 - 50 km/h (0 - 31 MPH).

CAUTION:

Always drive vehicle at a safe speed.

3.

Check DTC.

Is DTC detected?

YES

>> Perform the trouble diagnosis for DTC U0415, P0101, P0135, P0190, P0201, P0202, P0203,

P0204, P0217, P0226, P0471, P0544, P1544, P1620, P1650, P2002, P2080, P2243, P2244,
P2263, P2626 or P2A06, and GO TO 3. Refer to 

EC9-108, "DTC Index"

.

NO

>> INSPECTION END

P160D ECM

EC9-333

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

P160D ECM

DTC Logic

INFOID:0000000010309333

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 and wait at least 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC9-333, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010309334

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Erase DTC.

3.

Turn ignition switch OFF and wait for 1 minute.

4.

Turn ignition switch ON and wait at least 1 second.

5.

Perform the self-diagnosis.

Is the DTC P160D displayed again?

YES

>> GO TO 2.

NO

>> INSPECTION END

2.

REPLACE ECM

1.

Replace ECM.

2.

Perform 

EC9-144, "Work Procedure"

.

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P160D

COMPUTER
(Computer)
• 1.DEF: VALUES OUT-

SIDE TOLERANCES

ECM internal power supply malfunction.

ECM

EC9-334

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1620 ECM

P1620 ECM

DTC Logic

INFOID:0000000010309335

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC P1620 can not duplicate.

>> Proceed to 

EC9-334, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010309336

1.

CHECK ECM HARNESS CONNECTOR CONNECTIONS

1.

Turn ignition switch OFF.

2.

Check ECM harness connector connection.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK AIR FUEL RATIO (A/F) SENSOR HARNESS CONNECTOR CONNECTIONS

Check A/F sensor harness connector connection.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK A/F SENSOR CIRCUIT FOR OPEN AND SHORT

Check A/F sensor circuit for open and short.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK INTERMITTENT INCIDENT

Perform 

GI-41, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 5.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1620

PROPOR RICH SEN FNC
(Proportional richness sensor func-
tion)
• 1.DEF: VALUES OUTSIDE TOL-

ERANCES

ECM function is malfunctioning.

ECM

+

-

Continuity

ECM

A/F sensor

Connector

Terminal

Connector

Terminal

F82

89

F75

3

Existed

F83

115

6

116

2

119

1

P1620 ECM

EC9-335

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

NO

>> Repair or replace error-detected parts.

5.

REPLACE A/F SENSOR

Replace A/F sensor.

CAUTION:

• Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a

hard surface such as a concrete floor; use a new one.

• Before installing new A/F sensor, clean exhaust system threads using Heated Oxygen Sensor

Thread Cleaner tool and approved anti-seize lubricant.

>> INSPECTION END

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

 

 

 

 

 

 

 

Content      ..     19      20      21      22     ..