Infiniti G37 Coupe. Manual - part 564

 

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Infiniti G37 Coupe. Manual - part 564

 

 

P1572 ICC BRAKE SWITCH

EC-437

< COMPONENT DIAGNOSIS >

[VQ37VHR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

NO-2

>> M/T models: GO TO 8.

2.

CHECK OVERALL FUNCTION-II

 With CONSULT-III

Select “BRAKE SW2” and check indication under the following conditions.

 Without CONSULT-III

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 22.

NO

>> GO TO 16.

3.

CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ICC brake switch harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between ICC brake switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.
• Fuse block (J/B) connector E103
• 10A fuse (No. 3)
• Harness for open or short between ICC brake switch and fuse

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

5.

CHECK ICC BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between ICC brake switch 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 7.

Monitor item

Condition

Indication

BRAKE SW2

Brake pedal

Slightly depressed

ON

Fully released

OFF

ECM

Ground

Condition

Voltage

Connector

Terminal

M107

122

(Stop lamp switch signal)

Ground

Brake pedal

Slightly depressed

Battery voltage

Fully released

Approx. 0V

ICC brake switch

Ground

Voltage

Connector

Terminal

E114

1

Ground

Battery voltage

ICC brake switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

E114

2

M107

126

Existed

EC-438

< COMPONENT DIAGNOSIS >

[VQ37VHR]

P1572 ICC BRAKE SWITCH

NO

>> GO TO 6.

6.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E106, M6
• Harness for open or short between ICC brake switch and ECM

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

7.

CHECK ICC BRAKE SWITCH

Refer to 

EC-441, "Component Inspection (ICC Brake Switch)"

.

Is the inspection result normal?

YES

>> GO TO 22.

NO

>> Replace ICC brake switch.

8.

CHECK ICC BRAKE SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ICC brake switch harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between ICC brake switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> GO TO 9.

9.

CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ICC clutch switch harness connector.

3.

Turn ignition switch ON.

4.

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

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> GO TO 10.

10.

DETECT MALFUNCTIONING PART

Check the following.
• Fuse block (J/B) connector E103
• 10A fuse (No. 3)
• Harness for open or short between ICC clutch switch and fuse

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

11.

CHECK ICC BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check the continuity between ICC clutch switch harness connector and ICC brake switch harness con-
nector.

ICC brake switch

Ground

Condition

Voltage

Connector

Terminal

E114

1

Ground

Brake pedal

Slightly depressed

Approx. 0V

Fully released

Battery voltage

ICC clutch switch

Ground

Voltage

Connector

Terminal

E113

1

Ground

Battery voltage

P1572 ICC BRAKE SWITCH

EC-439

< COMPONENT DIAGNOSIS >

[VQ37VHR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

3.

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

Is the inspection result normal?

YES

>> GO TO 12.

NO

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

12.

CHECK ICC CLUTCH SWITCH

Refer to 

EC-441, "Component Inspection (ICC Clutch Switch)"

.

Is the inspection result normal?

YES

>> GO TO 22.

NO

>> Replace ICC clutch switch.

13.

CHECK ICC BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between ICC brake switch 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 15.

NO

>> GO TO 14.

14.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E106, M6
• Harness for open or short between ICC brake switch and ECM

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

15.

CHECK ICC BRAKE SWITCH

Refer to 

EC-441, "Component Inspection (ICC Brake Switch)"

.

Is the inspection result normal?

YES

>> GO TO 22.

NO

>> Replace ICC brake switch.

16.

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect stop lamp switch harness connector.

3.

Disconnect ICC brake hold relay harness connector.

4.

Check the voltage between stop lamp switch harness connector and ground.

5.

Check the voltage between ICC brake hold relay harness connector and ground.

ICC clutch switch

ICC brake switch

Continuity

Connector

Terminal

Connector

Terminal

E113

2

E114

1

Existed

ICC brake switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

E114

1

M107

126

Existed

Stop lamp switch

Ground

Voltage

Connector

Terminal

E110

1

Ground

Battery voltage

EC-440

< COMPONENT DIAGNOSIS >

[VQ37VHR]

P1572 ICC BRAKE SWITCH

Is the inspection result normal?

YES

>> GO TO 18.

NO

>> GO TO 17.

17.

DETECT MALFUNCTIONING PART

Check the following.
• Fuse block (J/B) connector E103
• 10A fuse (No. 7)
• Harness for open or short between battery and stop lamp switch
• Harness for open or short between battery and ICC brake hold relay

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

18.

CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check the continuity between stop lamp switch harness connector and ECM harness connector.

3.

Check the continuity between ICC brake hold 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 20.

NO

>> GO TO 19.

19.

DETECT MALFUNCTIONING PART

Check the following.
• Fuse block (J/B) connector E103, M2
• Harness for open or short between ECM and stop lamp switch
• Harness for open or short between ECM and ICC brake hold relay

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

20.

CHECK STOP LAMP SWITCH

Refer to 

EC-442, "Component Inspection (Stop Lamp Switch)"

.

Is the inspection result normal?

YES

>> GO TO 21.

NO

>> Replace stop lamp switch.

21.

CHECK ICC BRAKE HOLD RELAY

Refer to 

EC-442, "Component Inspection (ICC Brake Hold Relay)"

.

Is the inspection result normal?

YES

>> GO TO 22.

NO

>> Replace ICC brake hold relay.

ICC brake hold relay

Ground

Voltage

Connector

Terminal

E51

3

Ground

Battery voltage

Stop lamp switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

E110

2

M107

122

Existed

ICC brake hold relay

ECM

Continuity

Connector

Terminal

Connector

Terminal

E51

5

M107

122

Existed

 

 

 

 

 

 

 

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