Qashqai J11. Engine control system (R9M) - part 22

 

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Qashqai J11. Engine control system (R9M) - part 22

 

 

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

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EC9

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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

EC9-340

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1642 THERMOPLUNGER CONTROL UNIT

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 

EC9-341, "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

P1642 THERMOPLUNGER CONTROL UNIT

EC9-341

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

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EC9

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Component Inspection

INFOID:0000000010309342

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

EC9-342

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1643 THERMOPLUNGER CONTROL UNIT

P1643 THERMOPLUNGER CONTROL UNIT

DTC Logic

INFOID:0000000010309343

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 

EC9-342, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010309344

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

P1643

THMPR 3 RLY C/CIR
(Thermoplunger 3 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

P1643 THERMOPLUNGER CONTROL UNIT

EC9-343

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

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EC9

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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 

EC9-344, "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

EC9-344

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1643 THERMOPLUNGER CONTROL UNIT

Component Inspection

INFOID:0000000010309345

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

P1650 STARTER MOTOR RELAY 2

EC9-345

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

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EC9

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P1650 STARTER MOTOR RELAY 2

DTC Logic

INFOID:0000000010501207

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If the other DTC Confirmation Procedure is performed right before this procedure, the ignition switch must be
turned OFF and wait for 10 seconds or more to start this procedure.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE-1

1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON and wait at least 30 seconds

3.

Turn ignition switch OFF, wait at least 10 seconds and then turn ON.

4.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC9-345, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

1.

Start the engine and warm it up to normal operating temperature.

2.

Press start/stop OFF switch and check that the switch indicator is ON.

3.

Select “AUTO STOP START” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.

4.

Touch “START” and operate stop/start system. (engine stop.)

5.

Touch “CANCEL” and restart the engine.

Without CONSULT

Activate stop/start system. Refer to 

EC9-39, "STOP/START SYSTEM : System Description (M/T models)"

 (M/

T models), 

EC9-47, "STOP/START SYSTEM : System Description (CVT models)"

 (CVT models).

CAUTION:

Always drive vehicle at a safe speed.

Is stop/start system activated normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC9-345, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010501208

1.

CHECK ENGINE RESTART RELAY POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Remove engine restart relay.

3.

Check the voltage between engine restart relay harness connector and ground.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1650

STR MTR RELAY 2
(Starter motor relay 2)

A

Engine restart relay is stuck ON.

• Starter control relay
• Engine restart relay

B

Engine restart relay is stuck OFF.

• Harness and connectors

(Between engine restart relay and starter motor 
harness is shorted to ground.)
(Between battery and engine restart relay har-
ness is open or shorted to ground.)

• IPDM  E/R
• Engine restart relay

EC9-346

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1650 STARTER MOTOR RELAY 2

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK ENGINE RESTART RELAY POWER SUPPLY CIRCUIT

1.

Disconnect IPDM E/R harness connector.

2.

Check the continuity between engine restart relay harness connector and IPDM E/R harness connector.

3.

Also check harness for short to ground.

Is the inspection result normal?

YES

>> Check IPDM E/R.

NO

>> Repair or replace error-detected parts.

3.

CHECK ENGINE RESTART RELAY POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect starter relay.

3.

Check the continuity between engine restart relay harness connector and starter relay harness connector.

4.

Also check harness for short to ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Perform the trouble diagnosis for starter relay routing circuit.

4.

CHECK ENGINE RESTART RELAY CONTROL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between engine restart relay harness connector and ECM harness connector.

4.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

CHECK ENGINE RESTART RELAY OUTPUT SIGNAL CIRCUIT

1.

Check the continuity between engine restart relay harness connector and IPDM E/R harness connector.

+

Voltage

Engine restart relay

Connector

terminal

F163

2

Ground

Battery voltage

+

Continuity

Engine restart relay

IPDM E/R

Connector

terminal

Connector

terminal

F163

2

E39

44

Existed

+

Continuity

Starter relay

Engine restart relay

Connector

terminal

Connector

terminal

F162

3

F163

5

Existed

+

Continuity

Engine restart relay

ECM

Connector

terminal

Connector

terminal

F163

1

F82

42

Existed

P1650 STARTER MOTOR RELAY 2

EC9-347

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

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2.

Disconnect starter motor terminal.

3.

Check the continuity between engine restart relay and starter motor.

4.

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 ENGINE RESTART RELAY

Check engine restart relay. Refer to 

EC9-347, "Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Replace engine restart relay.

Component Inspection

INFOID:0000000010501209

1.

CHECK ENGINE RESTART RELAY

1.

Turn ignition switch OFF.

2.

Remove engine restart relay.

3.

Check the continuity between engine restart relay terminals as
per the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace engine restart relay.

+

Continuity

Engine restart relay

IPDM E/R

Connector

terminal

Connector

terminal

F163

3

F88

65

Existed

+

Continuity

Engine restart relay

Starter motor

Connector

terminal

Connector

terminal

F163

3

F104

1

Existed

Engine restart re-

lay

Condition

Continuity

+

terminal

3

5

12V direct current supply between 
terminals 1 and 2

Existed

No supply

Not existed

PIIA2636J

EC9-348

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1655 ENGINE RESTART BYPASS RELAY

P1655 ENGINE RESTART BYPASS RELAY

DTC Logic

INFOID:0000000010501210

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If the other DTC Confirmation Procedure is performed right before this procedure, the ignition switch must be
turned OFF and wait for 10 seconds or more to start this procedure.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Start the engine and warm it up to normal operating temperature.

2.

Press start/stop OFF switch and check that the switch indicator is ON.

3.

Select “AUTO STOP START” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.

4.

Touch “START” and operate stop/start system. (engine stop.)

5.

Touch “CANCEL” and restart the engine.

6.

Repeat Step 3 and Step 4 twice.

Without CONSULT

1.

Activate the stop/start system. Stop the engine. Restart the engine. Refer to 

EC9-39, "STOP/START SYS-

TEM : System Description (M/T models)"

 (M/T models), 

EC9-47, "STOP/START SYSTEM : System

Description (CVT models)"

 (CVT models).

2.

Repeat Step 1 four times.

CAUTION:

Always drive vehicle at a safe speed.

Is DTC detected?

YES

>> Proceed to 

EC9-348, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010501211

1.

CHECK FUSE

1.

Turn ignition switch OFF.

2.

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 ENGINE RESTART BYPASS CONTROL RELAY POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Remove engine restart bypass control relay.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1655

ENGINE RESTART BY-
PASS RELAY
(Engine restart bypass re-
lay)

At an engine restart by stop/start system, 
the voltage drop allowance is less thanAp-
prox. 0.1 V when the engine restart bypass 
relay becomes closed from the open sta-
tus, and this condition is repeated three 
times in a row.

• Harness or connectors

(Engine restart bypass relay circuit is open 
or shorted.)
(Engine restart bypass control relay circuit 
is open or shorted.)

• Engine restart bypass relay
• Engine restart bypass control relay

Location

Fuse No.

Capacity

Fuse block (J/B)

7

20 A

P1655 ENGINE RESTART BYPASS RELAY

EC9-349

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

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EC9

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3.

Turn ignition switch ON.

4.

Check the voltage between engine restart bypass control relay harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Perform the trouble diagnosis for power supply circuit.

3.

CHECK ENGINE RESTART BYPASS CONTROL RELAY CIRCUIT-1

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between engine restart bypass control relay harness connector and ECM harness
connector.

4.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK ENGINE RESTART BYPASS CONTROL RELAY CIRCUIT-2

1.

Disconnect engine restart bypass relay harness connector.

2.

Check the continuity between engine restart bypass control relay harness connector and engine restart
bypass relay harness connector.

3.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

CHECK ENGINE RESTART BYPASS CONTROL RELAY

Check the engine restart bypass control relay. Refer to 

EC9-350, "Component Inspection (Engine Restart

Bypass Control Relay)"

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace error-detected parts.

6.

CHECK ENGINE RESTART BYPASS RELAY

Check the engine restart bypass relay. Refer to 

EC9-350, "Component Inspection (Engine Restart Bypass

Relay)"

.

+

Voltage

Engine restart bypass control relay

Connector

Terminal

F98

1

Ground

Battery voltage

5

+

Continuity

Engine restart bypass con-

trol relay

ECM

Connector

Terminal

Connector

Terminal

F98

2

F83

151

Existed

+

Continuity

Engine restart bypass con-

trol relay

Engine restart bypass relay

Connector

Terminal

Connector

Terminal

F98

3

F146

1

Existed

EC9-350

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1655 ENGINE RESTART BYPASS RELAY

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Replace error-detected parts.

Component Inspection (Engine Restart Bypass Control Relay)

INFOID:0000000010501212

1.

CHECK ENGINE RESTART BYPASS CONTROL RELAY

1.

Turn ignition switch OFF.

2.

Remove engine restart bypass control relay.

3.

Check continuity between engine restart bypass control relay
terminals as per the following condition. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace engine restart bypass control relay.

Component Inspection (Engine Restart Bypass Relay)

INFOID:0000000010501213

1.

CHECK ENGINE RESTART BYPASS RELAY-1

1.

Turn ignition switch OFF.

2.

Disconnect battery cable from negative terminal.

3.

Remove engine restart bypass relay. Refer to 

EC9-409, "Exploded View"

.

4.

Check the continuity between engine restart bypass relay termi-
nal and engine restart bypass relay body.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace engine restart bypass relay. Refer to 

EC9-409, "Removal and Installation"

.

2.

CHECK ENGINE RESTART BYPASS RELAY-2

Check the resistance between engine restart bypass relay terminals
as per the following conditions. 

Is the inspection result normal?

Engine restart bypass control relay

Condition

Continuity

+

Terminal

3

5

12 V direct current supply 
between terminals 1 and 2

Existed

No current supply

Not existed

JSBIA0671ZZ

+

Continuity

Engine restart bypass 

relay

Terminal

1

Engine restart bypass 

relay body

Existed

JSBIA1735ZZ

Engine restart bypass relay

Condition

Resistance

(Approx.)

+

Terminal

2

3

12 V direct current sup-
ply between terminal 1 
and body

10 m

No current supply

JSBIA1736ZZ

P1655 ENGINE RESTART BYPASS RELAY

EC9-351

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

YES

>> INSPECTION END

NO

>> Replace engine restart bypass relay. Refer to 

EC9-409, "Removal and Installation"

.

EC9-352

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1656 ENGINE RESTART BYPASS RELAY

P1656 ENGINE RESTART BYPASS RELAY

DTC Logic

INFOID:0000000010309362

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If the other DTC Confirmation Procedure is performed right before this procedure, the ignition switch must be
turned OFF and wait for 10 seconds or more to start this procedure.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Start the engine and warm it up to normal operating temperature.

2.

Press start/stop OFF switch and check that the switch indicator is ON.

3.

Select “AUTO STOP START” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.

4.

Touch “START” and operate stop/start system. (engine stop.)

5.

Touch “CANCEL” and restart the engine.

6.

Repeat Step 3 and Step 4 twice.

Without CONSULT

1.

Activate the stop/start system. Stop the engine. Restart the engine. Refer to 

EC9-39, "STOP/START SYS-

TEM : System Description (M/T models)"

 (M/T models), 

EC9-47, "STOP/START SYSTEM : System

Description (CVT models)"

 (CVT models).

2.

Repeat Step 1 four times.

CAUTION:

Always drive vehicle at a safe speed.

Is DTC detected?

YES

>> Proceed to 

EC9-352, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010507872

1.

CHECK FUSE

1.

Turn ignition switch OFF.

2.

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 ENGINE RESTART BYPASS CONTROL RELAY POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Remove engine restart bypass control relay.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1656

ENGINE RESTART BY-
PASS RELAY
(Engine restart bypass re-
lay)

At an engine restart by stop/start system, 
the voltage right after the starter motor ac-
tivation is less than Approx. 8 V.

• Harness and connectors

(Engine restart bypass relay circuit is open 
or shorted.)
(Engine restart bypass control relay circuit 
is open or shorted.)

• Engine restart bypass relay
• Engine restart bypass control relay

Location

Fuse No.

Capacity

Fuse block (J/B)

7

20 A

P1656 ENGINE RESTART BYPASS RELAY

EC9-353

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

3.

Turn ignition switch ON.

4.

Check the voltage between engine restart bypass control relay harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Perform the trouble diagnosis for power supply circuit.

3.

CHECK ENGINE RESTART BYPASS CONTROL RELAY CIRCUIT-1

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between engine restart bypass control relay harness connector and ECM harness
connector.

4.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK ENGINE RESTART BYPASS CONTROL RELAY CIRCUIT-2

1.

Disconnect engine restart bypass relay harness connector.

2.

Check the continuity between engine restart bypass control relay harness connector and engine restart
bypass relay harness connector.

3.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

CHECK ENGINE RESTART BYPASS CONTROL RELAY

Check the engine restart bypass control relay. Refer to 

EC9-354, "Component Inspection (Engine Restart

Bypass Control Relay)"

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace error-detected parts.

6.

CHECK ENGINE RESTART BYPASS RELAY

Check the engine restart bypass relay. Refer to 

EC9-354, "Component Inspection (Engine Restart Bypass

Relay)"

.

+

Voltage

Engine restart bypass control relay

Connector

Terminal

F98

1

Ground

Battery voltage

5

+

Continuity

Engine restart bypass con-

trol relay

ECM

Connector

Terminal

Connector

Terminal

F98

2

F83

151

Existed

+

Continuity

Engine restart bypass con-

trol relay

Engine restart bypass relay

Connector

Terminal

Connector

Terminal

F98

3

F146

1

Existed

 

 

 

 

 

 

 

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