Infiniti G35 (V35) Sedan. Manual — part 566

EC-410

< COMPONENT DIAGNOSIS >

[VQ35HR]

P1572 ICC BRAKE SWITCH

Follow the procedure “With CONSULT-III” above.

Is 1st trip DTC detected?

YES

>> Go to

EC-410, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT-III

1.

Drive the vehicle for at least 5 consecutive seconds under the following conditions.

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
This procedure may be conducted with the drive wheels lifted in the shop or by driving the vehicle.
If a road test is expected to be easier, it is unnecessary to lift the vehicle.

2.

Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?

YES

>> Go to

EC-410, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000000956812

1.

CHECK OVERALL FUNCTION-I

With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.

3.

Check “BRAKE SW1” indication under the following conditions.

Without CONSULT-III

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO-1

>> A/T models: GO TO 3.

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.

VHCL SPEED SE

More than 30 km/h (19 mph)

Selector lever

Suitable position

Driving location

Depress the brake pedal for more than
five seconds so as not to come off from
the above-mentioned vehicle speed.

Monitor item

Condition

Indication

BRAKE SW1

Brake pedal (A/T)
Brake pedal and clutch pedal (M/T)

Slightly depressed

OFF

Fully released

ON

ECM

Ground

Condition

Voltage

Connector

Terminal

M107

126

(ICC brake switch signal)

Ground

Brake pedal (A/T)
Brake pedal and clutch pedal (M/T)

Slightly depressed

Approx. 0V

Fully released

Battery voltage

P1572 ICC BRAKE SWITCH

EC-411

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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.

NO

>> GO TO 6.

6.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E106, M6

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-412

< COMPONENT DIAGNOSIS >

[VQ35HR]

P1572 ICC BRAKE SWITCH

• 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-414, "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 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 13.

NO

>> GO TO 9.

9.

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 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 brake 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 brake switch harness connector and ICC clutch switch harness con-
nector.

3.

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

ICC clutch switch

Ground

Condition

Voltage

Connector

Terminal

E113

2

Ground

Brake pedal

Slightly depressed

Approx. 0V

Fully released

Battery voltage

ICC brake switch

Ground

Voltage

Connector

Terminal

E114

1

Ground

Battery voltage

ICC brake switch

ICC clutch switch

Continuity

Connector

Terminal

Connector

Terminal

E114

2

E113

2

Existed

P1572 ICC BRAKE SWITCH

EC-413

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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 BRAKE SWITCH

Refer to

EC-414, "Component Inspection (ICC Brake Switch)"

.

Is the inspection result normal?

YES

>> GO TO 22.

NO

>> Replace ICC brake 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 clutch 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 clutch switch and ECM

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

15.

CHECK ICC CLUTCH SWITCH

Refer to

EC-415, "Component Inspection (ICC Clutch Switch)"

.

Is the inspection result normal?

YES

>> GO TO 22.

NO

>> Replace ICC clutch 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.

Is the inspection result normal?

YES

>> GO TO 18.

NO

>> GO TO 17.

ICC clutch switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

E113

1

M107

126

Existed

Stop lamp switch

Ground

Voltage

Connector

Terminal

E110

1

Ground

Battery voltage

ICC brake hold relay

Ground

Voltage

Connector

Terminal

E51

3

Ground

Battery voltage