Nissan Titan A60. Manual - part 433

 

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Nissan Titan A60. Manual - part 433

 

 

EC-398

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P1574 ASCD VEHICLE SPEED SENSOR

Refer to 

BRC-24, "CONSULT-III Function (ABS)"

.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace.

3.

CHECK COMBINATION METER FUNCTION

Check combination meter function.

Refer to 

MWI-28, "CONSULT-III Function (METER/M&A)"

.

>> INSPECTION END

P1805 BRAKE SWITCH

EC-399

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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P1805 BRAKE SWITCH

Description

INFOID:0000000006158870

Brake switch signal is applied to the ECM through the stop lamp switch when the brake pedal is depressed.

This signal is used mainly to decrease the engine speed when the vehicle is driving.

On Board Diagnosis Logic

INFOID:0000000006158871

The MIL will not light up for this self-diagnosis.

FAIL-SAFE MODE

When the malfunction is detected, the ECM enters fail-safe mode.

DTC Confirmation Procedure

INFOID:0000000006158872

1. Turn ignition switch ON.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the DTC with CONSULT-III.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to 

EC-399, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006158873

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 

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1805
1805

Brake switch

A brake switch signal is not sent to ECM for ex-
tremely long time while the vehicle is driving.

• Harness or connectors

(Stop lamp switch circuit is open or short-
ed.)

• Stop lamp switch

Engine operating condition in fail-safe mode

ECM controls the electric throttle control actuator by regulating the throttle opening to a small range.
Therefore, acceleration will be poor.

Vehicle condition

Driving condition

When engine is idling

Normal

When accelerating

Poor acceleration

Brake pedal

Stop lamp

Fully released

Not illuminated

Depressed

Illuminated

EC-400

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P1805 BRAKE SWITCH

1. Disconnect stop lamp switch harness connector.

2. Check voltage between stop lamp switch terminal 1 and ground

with CONSULT-III or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors M31, E152

• Fuse block (J/B) connector M60

• 10A fuse

• Harness for open and short between stop lamp switch and fuse

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

4.

CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2.

Refer to Wiring Diagram.

4. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 5.

NG

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

5.

CHECK STOP LAMP SWITCH 

Refer to 

EC-401, "Component Inspection"

.

OK or NG

OK

>> GO TO 6.

NG

>> Replace stop lamp switch.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "How to Check Terminal"

 and 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

BBIA0373E

Voltage: Battery voltage

WBIA0545E

Continuity should exist.

P1805 BRAKE SWITCH

EC-401

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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Component Inspection

INFOID:0000000006158874

STOP LAMP SWITCH

1. Disconnect stop lamp switch harness connector.

2. Check continuity between stop lamp switch terminals 1 and 2

under the following conditions.

3. If NG, adjust stop lamp switch installation, refer to 

BR-13,

"Inspection and Adjustment - Standard Pedal"

, and perform step

2 again.

BBIA0373E

Conditions

Continuity

Brake pedal: Fully released

Should not exist.

Brake pedal: Slightly depressed

Should exist.

WBIA0546E

 

 

 

 

 

 

 

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