Nissan Altima L32. Instruction — part 1360

SEC-590

< ECU DIAGNOSIS >

[SEDAN WITHOUT INTELLIGENT KEY]

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

Fail Safe

INFOID:0000000004499239

CAN COMMUNICATION CONTROL

When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN

communication recovers normally, it also returns to normal control.

If No CAN Communication Is Available With ECM

ABMIA0473GB

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

SEC-591

< ECU DIAGNOSIS >

[SEDAN WITHOUT INTELLIGENT KEY]

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If No CAN Communication Is Available With BCM

IGNITION RELAY MALFUNCTION DETECTION FUNCTION

• IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.

• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation

coil circuit.

• If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to

alert the user to the ignition relay malfunction when the ignition switch is turned OFF.

NOTE:
The tail lamp turns OFF when the ignition switch is turned ON.

FRONT WIPER CONTROL

IPDM E/R detects front wiper stop position by a front wiper auto stop signal.

When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper

after repeating a front wiper 10 second activation and 20 second stop five times.

NOTE:

This operation status can be confirmed on the IPDM E/R “Data Monitor” that displays “BLOCK” for the item

“WIP PROT” while the wiper is stopped.

Control part

Fail-safe in operation

Cooling fan

• Signals cooling fans ON when the ignition switch is turned ON
• Signals cooling fans OFF when the ignition switch is turned OFF

A/C compressor

A/C relay OFF

Generator

Outputs the power generation command signal (PWM signal) 0%

Control part

Fail-safe in operation

Headlamp

• Turns ON the headlamp low relay when the ignition switch is turned ON
• Turns OFF the headlamp low relay when the ignition switch is turned OFF
• Headlamp high relay OFF

• Parking lamps
• License plate lamps
• Illumination
• Tail lamps

• Turns ON the tail lamp relay when the ignition switch is turned ON
• Turns OFF the tail lamp relay when the ignition switch is turned OFF

Front wiper

• The status just before activation of fail-safe control is maintained until the ignition

switch is turned OFF while the front wiper is operating at LO or HI speed.

• The wiper is operated at LO speed until the ignition switch is turned OFF if the fail-

safe control is activated while the front wiper is set in the INT mode and the front wiper
motor is operating.

Front fog lamps (if equipped)

Front fog lamp relay OFF

Horn

Horn OFF

Ignition relay

The status just before activation of fail-safe is maintained.

Starter motor

Starter control relay OFF

Electronic steering column lock unit

Electronic steering column lock relay OFF

DTC

Ignition switch

Ignition relay

Tail lamp relay

—

ON

ON

—

—

OFF

OFF

—

B2098: IGN RELAY ON

OFF

ON

ON (10 minutes)

B2099: IGN RELAY OFF

ON

OFF

—

Ignition switch

Front wiper switch

Auto stop signal

ON

OFF

Front wiper stop position signal cannot be
input 10 seconds.

ON

The signal does not change for 10 seconds.

SEC-592

< ECU DIAGNOSIS >

[SEDAN WITHOUT INTELLIGENT KEY]

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

STARTER MOTOR PROTECTION FUNCTION

IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains

active for 90 seconds.

DTC Index

INFOID:0000000004499240

NOTE:

The details of TIME display are as follows.

• CRNT: The malfunctions that are detected now

• 1 - 39: The number is indicated when it is normal at present and a malfunction was detected in the past. It

increases like 0

→ 1 → 2 · · · 38 → 39 after returning to the normal condition whenever IGN OFF → ON. It is

fixed to 39 until the self-diagnosis results are erased if it is over 39. It returns to 0 when a malfunction is

detected again in the process.

CONSULT-III display

Fail-safe

TIME

NOTE

Refer to

No DTC is detected.
further testing
may be required.

—

—

—

—

U1000: CAN COMM CIRCUIT

×

CRNT

1 – 39

PCS-20

B2098: IGN RELAY ON

×

CRNT

1 – 39

PCS-21

B2099: IGN RELAY OFF

—

CRNT

1 – 39

PCS-22

B2108: STRG LCK RELAY ON

—

CRNT

1 – 39

SEC-42

B2109: STRG LCK RELAY OFF

—

CRNT

1 – 39

SEC-43

B210A: STRG LCK STATE SW

—

CRNT

1 – 39

SEC-44

B210B: START CONT RLY ON

—

CRNT

1 – 39

SEC-48

B210C: START CONT RLY OFF

—

CRNT

1 – 39

SEC-49

B210D: STARTER RELAY ON

—

CRNT

1 – 39

SEC-50

B210E: STARTER RELAY OFF

—

CRNT

1 – 39

SEC-51

B210F: INTRLCK/PNP SW ON

—

CRNT

1 – 39

SEC-54

B2110: INTRLCK/PNP SW OFF

—

CRNT

1 – 39

SEC-59

ENGINE START FUNCTION SYMPTOMS

SEC-593

< SYMPTOM DIAGNOSIS >

[SEDAN WITHOUT INTELLIGENT KEY]

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SYMPTOM DIAGNOSIS

ENGINE START FUNCTION SYMPTOMS

Symptom Table

INFOID:0000000004499244

Engine cannot be started with all keyfobs.

CAUTION:

• Follow Trouble Diagnosis Flowchart referring to “

SEC-411, "Work Flow"

”. Determine malfunctioning

condition before performing this diagnosis.

• Check that vehicle is under the condition shown in “Conditions of vehicle” before starting diagno-

sis.

• Check systems shown in the “Diagnosis/service procedure” column in this order.

CONDITIONS OF VEHICLE (OPERATING CONDITIONS)

• Engine start function is ON when setting on CONSULT-III.

• Use keyfob with registered keyfob ID.

• One or more of keyfobs with registered keyfob ID is in the passenger compartment.

Diagnosis/service procedure

Reference page

1. Check power supply and ground circuit

BCM

BCS-42

IPDM E/R

PCS-23

2. Check push button ignition switch

SEC-499

3. Check Intermittent Incident

GI-42