Infiniti EX35. Manual - part 823

EXL-336

< ECU DIAGNOSIS >

[HALOGEN TYPE]

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

Fail-safe

INFOID:0000000003757068

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

JCMWM1414GB

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

EXL-337

< ECU DIAGNOSIS >

[HALOGEN TYPE]

C

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F

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EXL

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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.

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 seconds activation and 20 seconds stop five times.

Control part

Fail-safe operation

Cooling fan

• Outputs the pulse duty signal (PWM signal) 100% when the ignition switch is turned 

ON

• Outputs the pulse duty signal (PWM signal) 0% when the ignition switch is turned OFF

A/C compressor

A/C relay OFF

Alternator

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

Control part

Fail-safe 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
• Side maker lamps
• Illuminations
• 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

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

Steering lock unit

Steering lock relay OFF

Voltage judgment

IPDM E/R judgment

Operation

Ignition relay contact side

Ignition relay excitation coil 

side

ON

ON

Ignition relay ON normal

—

OFF

OFF

Ignition relay OFF normal

—

ON

OFF

Ignition relay ON stuck

• Detects DTC “B2098: IGN RELAY ON”
• Turns ON the tail lamp relay for 10 min-

utes

OFF

ON

Ignition relay OFF stuck

Detects DTC “B2099: IGN RELAY OFF”

EXL-338

< ECU DIAGNOSIS >

[HALOGEN TYPE]

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

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.

DTC Index

INFOID:0000000003757069

NOTE:
• The details of time display are as follows.
- CRNT: A malfunction is detected now
- PAST: A malfunction was detected in the past.
• IGN counter is displayed on FFD (Freeze Frame data).
- The number is 0 when is detected now
- The number increases like 1 

→

 2 ··· 38 

→

 39 after returning to the normal condition whenever IGN OFF 

→

ON.

- The number is fixed to 39 until the self-diagnosis results are erased if it is over 39.

×

: Applicable

Ignition switch

Front wiper switch

Front wiper auto stop signal

ON

OFF

The front wiper auto stop signal (stop posi-
tion) cannot be input for 10 seconds.

ON

The front wiper auto stop signal does not 
change for 10 seconds.

CONSULT display

Fail-safe

Reference

No DTC is detected.
further testing
may be required.

—

—

U1000: CAN COMM CIRCUIT

×

PCS-16

B2098: IGN RELAY ON

×

PCS-17

B2099: IGN RELAY OFF

—

PCS-18

B2108: STRG LCK RELAY ON

—

SEC-97

B2109: STRG LCK RELAY OFF

—

SEC-98

B210A: STRG LCK STATE SW

—

SEC-99

B210B: START CONT RLY ON

—

SEC-103

B210C: START CONT RLY OFF

—

SEC-104

B210D: STARTER RELAY ON

—

SEC-105

B210E: STARTER RELAY OFF

—

SEC-106

B210F: INTRLCK/PNP SW ON

—

SEC-108

B2110: INTRLCK/PNP SW OFF

—

SEC-110

EXTERIOR LIGHTING SYSTEM SYMPTOMS

EXL-339

< SYMPTOM DIAGNOSIS >

[HALOGEN TYPE]

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SYMPTOM DIAGNOSIS

EXTERIOR LIGHTING SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000003534051

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 (HI) is not 
turned ON.

One side

• Fuse
• Halogen bulb (HI)
• Harness between IPDM E/R 

and the headlamp high

• Daytime running light relay (with 

daytime running light system)

• IPDM E/R

Headlamp (HI) circuit
Refer to 

EXL-242

.

Both sides

Symptom diagnosis
 “BOTH SIDE HEADLAMPS (HI) ARE NOT TURNED ON”
Refer to 

EXL-342

.

Headlamp (HI) is not 
turned OFF.

When ignition switch is 
turned ON.

When ignition switch is 
turned OFF.

IPDM E/R

—

High beam indicator lamp is not turned ON.
[The headlamp (HI) is turned ON.]

Combination meter

• Combination meter 

Data monitor “HI-BEAM IND”

• BCM (HEAD LAMP)

Active test “HEADLAMP”

Headlamp (LO) is not 
turned ON.

One side

• Fuse
• Halogen bulb (LO)
• Harness between IPDM E/R 

and the headlamp low

• IPDM E/R

Headlamp (LO) circuit
Refer to 

EXL-244

.

Both sides

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

EXL-343

.

Headlamp (LO) is not 
turned OFF.

When ignition switch is 
turned ON.

When ignition switch is 
turned OFF.

IPDM E/R

—

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

• Combination switch
• Harness between the combina-

tion switch and BCM

• BCM

Combination switch
Refer to 

BCS-82

.

• Optical sensor
• Harness between the optical 

sensor and BCM

• BCM

Optical sensor
Refer to 

EXL-252

.

Front fog lamp is not 
turned ON.

One side

• Front fog lamp bulb
• Harness between IPDM E/R 

and the front combination lamp

• Front combination lamp
• IPDM E/R

Front fog lamp circuit
Refer to 

EXL-246

.

Both side

Symptom diagnosis
"BOTH SIDE FRONT FOG LAMPS ARE NOT TURNED ON"
Refer to 

EXL-345

.

Front fog lamp is not turned ON.

Parking lamp is not turned ON.

• Fuse
• Parking lamp bulb
• Harness between IPDM E/R 

and the front combination lamp

• Front combination lamp
• IPDM E/R

Parking lamp circuit
Refer to 

EXL-248

.