Infiniti FX35, FX50 (S51). Manual - part 1945

DIAGNOSIS AND REPAIR WORKFLOW

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< BASIC INSPECTION >

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

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OVERALL SEQUENCE

DETAILED FLOW

1.

INTERVIEW FOR MALFUNCTION

Interview the symptom to the customer.

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< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

>> GO TO 2.

2.

SYMPTOM CHECK

Check the symptom from the customer's information.

>> GO TO 3.

3.

BASIC INSPECTION

Check the operation of each part. Check that any symptom occurs other than the interviewed symptom.

>> GO TO 4.

4.

SELF-DIAGNOSIS WITH CONSULT-III

Perform the self-diagnosis with CONSULT-III. Check that any DTC is detected.
Is any DTC detected?

YES

>> GO TO 5.

NO

>> GO TO 6.

5.

TROUBLE DIAGNOSIS BY DTC

Perform the trouble diagnosis for the detected DTC. Specify the malfunctioning part.

>> GO TO 9.

6.

FAIL-SAFE ACTIVATION CHECK

Check that the symptom is applied to the fail-safe activation.
Does the fail-safe activate?

YES

>> GO TO 7.

NO

>> GO TO 8.

7.

SYSTEM DIAGNOSIS

Perform the system diagnosis for the system that the fail-safe activates. Specify the malfunctioning part.

>> GO TO 9.

8.

SYMPTOM DIAGNOSIS

Perform the symptom diagnosis. Specify the malfunctioning part.

>> GO TO 9.

9.

MALFUNCTION PART REPAIR

Repair or replace the malfunctioning part.

>> GO TO 10.

10.

REPAIR CHECK (SELF-DIAGNOSIS WITH CONSULT-III)

Perform the self-diagnosis with CONSULT-III. Check that any DTC is not detected. Erase DTC if DTC is
detected before the repair. Check that DTC is not detected again.

Is any DTC detected?

YES

>> GO TO 5.

NO

>> GO TO 11.

11.

REPAIR CHECK (OPERATION CHECK)

Check the operation of each part.
Does it operate normally?

YES

>> INSPECTION END

NO

>> GO TO 3.

FRONT WIPER AND WASHER SYSTEM

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< SYSTEM DESCRIPTION >

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SYSTEM DESCRIPTION

FRONT WIPER AND WASHER SYSTEM

WITH RAIN SENSOR

WITH RAIN SENSOR : System Diagram

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WITH RAIN SENSOR : System Description

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OUTLINE

The front wiper is controlled by each function of BCM and IPDM E/R.

Control by BCM

• Combination switch reading function
• Front wiper control function

Control by IPDM E/R

• Front wiper control function
• Relay control function
Combination meter indicates low washer fluid warning judged with the signal from the washer level switch. For
details of low washer fluid warning, refer to 

MWI-25, "WARNING LAMPS/INDICATOR LAMPS : System

Description"

.

FRONT WIPER BASIC OPERATION

• BCM detects the combination switch condition by the combination switch reading function.
• BCM transmits the front wiper request signal to IPDM E/R with CAN communication depending on each

operating condition of the front wiper.

• IPDM E/R turns ON/OFF the integrated front wiper relay and the front wiper high relay according to the front

wiper request signal. IPDM E/R provides the power supply to operate the front wiper HI/LO operation.

FRONT WIPER LO OPERATION

• BCM transmits the front wiper request signal (LO) to IPDM E/R with CAN communication according to the

front wiper LO operating condition.

Front wiper LO operating condition

- Ignition switch ON
- Front wiper switch LO or front wiper switch MIST (while pressing)
• IPDM E/R turns ON the integrated front wiper relay according to the front wiper request signal (LO).

FRONT WIPER HI OPERATION

• BCM transmits the front wiper request signal (HI) to IPDM E/R with CAN communication according to the

front wiper HI operating condition.

Front wiper HI operating condition

- Ignition switch ON
- Front wiper switch HI

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< SYSTEM DESCRIPTION >

FRONT WIPER AND WASHER SYSTEM

• IPDM E/R turns ON the integrated front wiper relay and the front wiper high relay according to the front wiper

request signal (HI).

FRONT WIPER AUTO OPERATION

Rain Sensing

Rain level and sensor conditions are detected by rain sensor.
• BCM transmits the vehicle conditions (vehicle speed, front wiper condition, rain sensor sensitivity setting,

etc.) to the rain sensor via the rain sensor serial link.

• Rain sensor judges a wiping speed for front wiper by rain condition and the vehicle conditions. And it trans-

mits the wiping speed request signal to the BCM via the rain sensor serial link.

Auto Wiping Operation 

• BCM receives the wiping speed request signal from the rain sensor via the rain sensor serial link.
• BCM controls front wiper operation according to the wiping speed request signals. And it transmits the front

wiper request signals (LO or HI) to the IPDM E/R via CAN communication line.

Front wiper AUTO operating condition

- Ignition switch ON
- Front wiper switch INT
NOTE:
When the front wiper switch is turned to INT position, front wiper operates once regardless of a rainy condition.

Rain Sensor Sensitivity Setting

BCM determines rain sensor sensitivity according to a wiper volume.

NOTE:
When the wiper volume is turned up at 1 level with front wiper AUTO operating condition, front wiper operates
once.

FRONT WIPER AUTO STOP OPERATION

• BCM stops transmitting the front wiper request signal when the front wiper switch is turned OFF.
• IPDM E/R detects the front wiper stop position signal from the front wiper motor and detects the front wiper

motor position (stop position/except stop position).

• When the front wiper request signal is stopped, IPDM E/R turns ON the front wiper relay until the front wiper

motor returns to the stop position.

NOTE:

Wiper intermittent dial position

Sensitivity

1

High sensitivity

2

3

Medium 

−

 high sensitivity

4

5

Low 

−

 medium sensitivity

6

7

Low sensitivity

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