Infiniti QX56 (JA60). Manual — part 526

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

EXL-133

< ECU DIAGNOSIS >

C

D

E

F

G

H

I

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K

M

A

B

EXL

N

O

P

Fail Safe

INFOID:0000000005369901

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

ABMIA1043GB

EXL-134

< ECU DIAGNOSIS >

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

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.

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.

Control part

Fail-safe in operation

Cooling fan

• Turns ON the cooling fan relay when the ignition switch is turned ON
• Turns OFF the cooling fan relay when the ignition switch is turned OFF

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 LH/RH relays OFF

• Parking lamps
• License plate lamps
• 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.

Rear window defogger

Rear window defogger relay OFF

A/C compressor

A/C relay OFF

Front fog lamps

Front fog lamp relay OFF

Ignition switch

Ignition relay

Tail lamp relay

ON

ON

—

OFF

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.

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

EXL-135

< ECU DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

DTC Index

INFOID:0000000005369902

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-17

EXL-136

< SYMPTOM DIAGNOSIS >

EXTERIOR LIGHTING SYSTEM SYMPTOMS

SYMPTOM DIAGNOSIS

EXTERIOR LIGHTING SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000005146686

CAUTION:

Perform the self-diagnosis with CONSULT-III before the symptom diagnosis. Perform the trouble diag-

nosis if any DTC is detected.

Symptom

Possible cause

Inspection item

Headlamp does not
switch to the high beam.

One side

• Fuse
• Harness between IPDM E/R

and the front combination lamp

• Front combination lamp

(High beam relay)

• IPDM E/R

Headlamp (HI) circuit
Refer to

EXL-30, "Description"

.

Both sides

Symptom diagnosis
"BOTH SIDE HEADLAMPS DO NOT SWITCH TO HIGH BEAM"
Refer to

EXL-139

.

High beam indicator lamp is not turned ON.
(Headlamp switches to the high beam.)

• Combination meter
• BCM

• Combination meter.

Data monitor "HI-BEAM IND".

• BCM (HEAD LAMP)

Active test "HEADLAMP".

Headlamp does not
switch to the low beam.

One side

Front combination lamp (Low
beam relay)

—

Both sides

• Combination switch (lighting

and turn signal switch)

• Harness between the combina-

tion switch and BCM

• BCM

Combination switch
Refer to

BCS-38

.

High beam request signal
• BCM
• IPDM E/R

IPDM E/R
Data monitor "HL HI REQ".

IPDM E/R

—

Headlamp does not turn
ON.

One side

• Fuse
• Bulb
• Harness between IPDM E/R

and the front combination lamp

• Front combination lamp
• IPDM E/R

Headlamp (LO) circuit
Refer to

EXL-33

.

Both sides

Symptom diagnosis
"BOTH SIDE HEADLAMPS (LO) ARE NOT TURNED ON"
Refer to

EXL-140, "Description"

.

Headlamp does not turn
OFF.

When the ignition
switch is turned ON

• BCM
• Combination switch (lighting

and turn signal switch)

Combination switch (lighting and
turn signal switch)
Refer to

BCS-38

.

Headlamp is not turned ON/OFF with the lighting
switch AUTO.

• Combination switch (lighting

and turn signal switch)

• Harness between the combina-

tion switch and BCM

• BCM

Combination switch (lighting and
turn signal switch)
Refer to

BCS-38

.

• Optical sensor
• Harness between the optical

sensor and BCM

• BCM

Optical sensor
Refer to

EXL-47

.