Infiniti M35/M45 Y50. Manual — part 734

ICC BRAKE SWITCH

EC-1409

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EC

10.

DETECT MALFUNCTIONING PART

Check the following.

●

Fuse block (J/B) connector E101

●

10A fuse

●

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 or short to power in harness or connectors.

11.

CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between the following;
ECM terminal 101 and stop lamp switch terminal 2,
ECM terminal 101 and ICC brake hold relay terminal 5.
Refer to Wiring Diagram.

3.

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

OK or NG

OK

>> GO TO 13.

NG

>> GO TO 12.

12.

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E108, M15

●

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.

13.

CHECK STOP LAMP SWITCH

Refer to

EC-1410, "Component Inspection"

.

OK or NG

OK

>> GO TO 14.

NG

>> Replace stop lamp switch.

14.

CHECK ICC BRAKE HOLD RELAY

Refer to

EC-1410, "Component Inspection"

.

OK

>> GO TO 15.

NG

>> Replace ICC brake hold relay.

15.

CHECK INTERMITTENT INCIDENT

Refer to

EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

.

>> INSPECTION END

Continuity should exist.

EC-1410

[VK45DE]

ICC BRAKE SWITCH

Component Inspection

NBS005QI

ICC BRAKE SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect ICC brake switch harness connector.

3.

Check continuity between ICC brake switch terminals 1 and 2
under the following conditions.

4.

If NG, adjust ICC brake switch installation, refer to

BR-6,

"BRAKE PEDAL"

, and perform step 3 again.

STOP LAMP SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect stop lamp switch harness connector.

3.

Check continuity between stop lamp switch terminals 1 and 2
under the following conditions.

4.

If NG, adjust stop lamp switch installation, refer to

BR-6,

"BRAKE PEDAL"

, and perform step 3 again.

ICC BRAKE HOLD RELAY

1.

Check continuity between ICC brake hold relay terminals 3 and
5 under the following conditions.

2.

If NG, replace ICC brake hold relay.

Condition

Continuity

Brake pedal: Fully released

Should exist

Brake pedal: Slightly depressed

Should not exist

PBIB1536E

Condition

Continuity

Brake pedal: Fully released

Should not exist

Brake pedal: Slightly depressed

Should exist

PBIA9489J

Condition

Continuity

12V direct current supply between terminals
1 and 2

Should not exist

No current supply

Should exist

PBIB0098E

IGNITION SIGNAL

EC-1411

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IGNITION SIGNAL

PFP:22448

Component Description

NBS005PQ

IGNITION COIL & POWER TRANSISTOR

The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns
ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil
secondary circuit.

: Vehicle front

1.

Ignition coil (with power transistor)
(bank 2)

2.

Ignition coil (with power transistor)
(bank 1)

PBIB2692E

EC-1412

[VK45DE]

IGNITION SIGNAL

Wiring Diagram

NBS005PR

TBWT1061E