Infiniti G35 (V35) Sedan. Manual - part 979

MWI

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

MWI-143

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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:

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

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.

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< ECU DIAGNOSIS >

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

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:0000000000964434

*1: Only for the models with AFS

*2: Only for the models without AFS (The display is fixed to CRNT until the self-diagnosis results are erased when the malfunctions were
found in the past.)

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 display

Fail-safe

TIME

NOTE

Refer to

No DTC is detected.
further testing
may be required.

—

—

—

—

U1000: CAN COMM CIRCUIT

×

CRNT

1 –39

*1

PCS-15

CRNT

*2

B2098: IGN RELAY ON

×

CRNT

1 – 39

PCS-16

B2099: IGN RELAY OFF

—

CRNT

1 – 39

PCS-17

B2108: STRG LCK RELAY ON

—

CRNT

1 – 39

SEC-89

B2109: STRG LCK RELAY OFF

—

CRNT

1 – 39

SEC-90

B210A: STRG LCK STATE SW

—

CRNT

1 – 39

SEC-91

B210B: START CONT RLY ON

—

CRNT

1 – 39

SEC-95

B210C: START CONT RLY OFF

—

CRNT

1 – 39

SEC-96

B210D: STARTER RELAY ON

—

CRNT

1 – 39

SEC-97

B210E: STARTER RELAY OFF

—

CRNT

1 – 39

SEC-98

B210F: INTRLCK/PNP SW ON

—

CRNT

1 – 39

SEC-100

B2110: INTRLCK/PNP SW OFF

—

CRNT

1 – 39

SEC-104

MWI

THE FUEL GAUGE POINTER DOES NOT MOVE

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SYMPTOM DIAGNOSIS

THE FUEL GAUGE POINTER DOES NOT MOVE

Description

INFOID:0000000000964435

Fuel gauge needle will not move from a certain position.

Diagnosis Procedure

INFOID:0000000000964436

1.

CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL

1.

Connect CONSULT-III.

2.

Select the “Data Monitor” for the “METER/M&A” and compare the “FUEL METER” monitor value with the
fuel gauge reading on the combination meter. Refer to 

MWI-53, "Component Function Check"

.

Does monitor value match fuel gauge reading?

YES

>> GO TO 2.

NO

>> Replace combination meter.

2.

CHECK FUEL LEVEL SENSOR SIGNAL CIRCUIT

Inspect the fuel level sensor signal circuit. Refer to 

MWI-53, "Diagnosis Procedure"

. 

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK FUEL LEVEL SENSOR UNIT

Perform a unit inspection for the fuel level sensor unit. Refer to 

MWI-54, "Component Inspection"

. 

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace fuel level sensor unit. Refer to 

FL-5, "Removal and Installation"

.

4.

CHECK FLOAT INTERFERENCE

Check that the float arm interferes with or binds to other components in the fuel tank.
Is the inspection result normal?

YES

>> Replace unified meter and A/C amp.

NO

>> Repair or replace malfunctioning parts.

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THE METER CONTROL SWITCH IS INOPERATIVE

THE METER CONTROL SWITCH IS INOPERATIVE

Description

INFOID:0000000000964437

If any of the following malfunctions is found for the meter control switch operation

• All switches are inoperative
• The specified switch cannot be operated

Diagnosis Procedure

INFOID:0000000000964438

1.

CHECK METER CONTROL SWITCH SIGNAL CIRCUIT

Inspect the meter control switch signal circuit. Refer to 

MWI-56, "Diagnosis Procedure"

. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK METER CONTROL SWITCH UNIT

Perform a unit inspection for the meter control switch. Refer to 

MWI-57, "Component Inspection"

. 

Is the inspection result normal?

YES

>> Replace combination meter.

NG

>> Replace meter control switch.