Nissan Titan. Instruction — part 264

P0550 PSP SENSOR

EC-357

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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Component Inspection

INFOID:0000000009886776

POWER STEERING PRESSURE SENSOR

1. Reconnect all harness connectors disconnected.
2. Start engine and let it idle.
3. Check voltage between ECM terminal 12 and ground under the

following conditions.

Condition

Voltage

Steering wheel: Being turned

0.5 - 4.5V

Steering wheel: Not being turned

0.4 - 0.8V

MBIB0126E

EC-358

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0603 ECM

P0603 ECM

DTC Logic

INFOID:0000000010118756

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is 11 V or more with ignition

switch ON.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 1 second.

2. Turn ignition switch OFF and wait at least 10 seconds.

3. Repeat step 1 and 2 for 10 times.

4. Turn ignition switch ON.

5. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to

EC-358, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010118757

1.

CHECK ECM POWER SUPPLY AND GROUND CIRCUIT

Perform trouble diagnosis for ECM power supply and ground circuit. Refer to

GI-39, "How to Check Terminal"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to

GI-42, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Erase DTC.

3. Perform DTC confirmation procedure. Refer to

EC-358, "DTC Logic"

.

Is the 1st trip DTC P0603 displayed again?

YES

>> Replace ECM.

NO

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0603

ECM BACK UP CIRCUIT
[Internal control module keep
alive memory (KAM) error]

• Malfunction in the internal back up RAM of ECM.
• Malfunction in the internal EEP-ROM system of

ECM.

• ECM power supply
• ECM

P0604 ECM

EC-359

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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P0604 ECM

DTC Logic

INFOID:0000000010118758

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is 11 V or more with ignition

switch ON.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON (engine stopped) and wait least 20 minutes.

CAUTION:

Never start engine during this procedure.

2. Turn ignition switch OFF and wait at least 10 seconds.

3. Turn ignition switch ON.

4. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to

EC-359, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010118759

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Erase DTC.

3. Perform DTC confirmation procedure. Refer to

EC-359, "DTC Logic"

.

Is the 1st trip DTC P0604 displayed again?

YES

>> Replace ECM.

NO

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0604

ECM
[Internal control module
random access memory
(RAM) error]

Malfunction in the internal RAM of ECM.

ECM

EC-360

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0605 ECM

P0605 ECM

DTC Logic

INFOID:0000000010118760

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is 11 V or more with ignition

switch ON.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON (engine stopped) and wait least 20 minutes.

CAUTION:

Never start engine during this procedure.

2. Turn ignition switch OFF and wait at least 10 seconds.

3. Turn ignition switch ON.

4. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to

EC-360, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010118761

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Erase DTC.

3. Perform DTC confirmation procedure. Refer to

EC-360, "DTC Logic"

.

Is the 1st trip DTC P0605 displayed again?

YES

>> Replace ECM.

NO

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0605

ECM
[Internal control module
read only memory (ROM)
error]

Malfunction in the internal ROM of ECM.

ECM