Infiniti M35/M45 Y50. Manual - part 710

DTC P1805 BRAKE SWITCH

EC-1313

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ASCD MODELS

1. 

CHECK STOP LAMP SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Check the stop lamp when depressing and releasing the brake pedal.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 2.

2. 

CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

1.

Disconnect stop lamp switch (1) harness connector.

–

ASCD brake switch (2)

2.

Check voltage between stop lamp switch terminal 1 and ground
with CONSULT -II or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3. 

DETECT MALFUNCTIONING PART

Check the following.

●

Fuse block (J/B) connector E101

●

10A fuse

●

Harness for open or short between stop lamp switch and battery

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

Brake pedal

Stop lamp

Fully released

Not illuminated

Slightly depressed

Illuminated

PBIB2705E

Voltage: Battery voltage

PBIA9488J

EC-1314

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DTC P1805 BRAKE SWITCH

4. 

CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2.
Refer to Wiring Diagram.

3.

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

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 5.

5. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E108, M15

●

Harness for open or short between ECM and stop lamp switch

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

6. 

CHECK STOP LAMP SWITCH 

Refer to 

EC-1315, "Component Inspection"

 .

OK or NG

OK

>> GO TO 7.

NG

>> Replace stop lamp switch.

7. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Continuity should exist.

DTC P1805 BRAKE SWITCH

EC-1315

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Component Inspection

NBS005NS

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 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

EC-1316

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DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY

DTC P2100, P2103 THROTTLE CONTROL MOTOR RELAY

PFP:16119

Component Description

NBS005NT

Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle
control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends
an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition
switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not
provided to the ECM.

CONSULT-II Reference Value in Data Monitor Mode

NBS005NU

Specification data are reference values.

On Board Diagnosis Logic

NBS005NV

These self-diagnoses have the one trip detection logic.

FAIL-SAFE MODE

When the malfunction is detected, ECM enters fail-safe mode and the MlL lights up.

DTC Confirmation Procedure

NBS005NW

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.

PROCEDURE FOR DTC P2100

 With CONSULT-II

1.

Turn ignition switch ON and wait at least 2 seconds.

2.

Select “DATA MONITOR””mode with CONSULT-II.

3.

Start engine and let it idle for 5 seconds.

4.

If DTC is detected, go to 

EC-1319, "Diagnostic Procedure"

 .

 With GST

Follow the procedure “With CONSULT-II” above.

MONITOR ITEM

CONDITION

SPECIFICATION

THRTL RELAY

●

Ignition switch: ON

ON

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2100
2100

Throttle control motor 
relay circuit open

ECM detects a voltage of power source for 
throttle control motor is excessively low.

●

Harness or connectors
(Throttle control motor relay circuit is 
open)

●

Throttle control motor relay

P2103
2103

Throttle control motor 
relay circuit short

ECM detect the throttle control motor relay is 
stuck ON.

●

Harness or connectors
(Throttle control motor relay circuit is 
shorted)

●

Throttle control motor relay

Engine operating condition in fail-safe mode

ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return 
spring.

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