Infiniti G37 Coupe. Manual - part 1450

 

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Infiniti G37 Coupe. Manual - part 1450

 

 

WW-74

< ECU DIAGNOSIS >

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

Fail Safe

INFOID:0000000001767934

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

JCMWA0849GB

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

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< ECU DIAGNOSIS >

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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 seconds activation and 20 seconds 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

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.

WW-76

< 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:0000000001767935

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

CONSULT display

Fail-safe

Refer to

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-101

B2109: STRG LCK RELAY OFF

SEC-102

B210A: STRG LCK STATE SW

SEC-103

B210B: START CONT RLY ON

SEC-107

B210C: START CONT RLY OFF

SEC-108

B210D: STARTER RELAY ON

SEC-109

B210E: STARTER RELAY OFF

SEC-110

B210F: INTRLCK/PNP SW ON

SEC-112

B2110: INTRLCK/PNP SW OFF

SEC-116

FRONT WIPER AND WASHER SYSTEM SYMPTOMS

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< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

FRONT WIPER AND WASHER SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000001629631

CAUTION:

Perform the self-diagnosis with CONSULT-III before performing the diagnosis by symptom. Perform
the diagnosis by DTC if DTC is detected.

Symptom

Probable malfunction location

Inspection item

Front wiper does not 
operate

HI only

• Combination switch
• Harness between combination switch and BCM
• BCM

Combination switch 
Refer to 

BCS-77, "Symptom 

Table"

.

• IPDM E/R
• Harness between IPDM E/R and front wiper 

motor

• Front wiper motor

Front wiper motor (HI) circuit
Refer to 

WW-21, "Compo-

nent Function Check"

.

Front wiper request signal
• BCM
• IPDM E/R

IPDM E/R
Data monitor "FR WIP REQ"

LO and INT

• Combination switch
• Harness between combination switch and BCM
• BCM

Combination switch
Refer to 

BCS-77, "Symptom 

Table"

.

• IPDM E/R
• Harness between IPDM E/R and front wiper 

motor

• Front wiper motor

Front wiper motor (LO) circuit
Refer to 

WW-19, "Compo-

nent Function Check"

.

Front wiper request signal
• BCM
• IPDM E/R

IPDM E/R
Data monitor "FR WIP REQ"

INT only

• Combination switch
• Harness between combination switch and BCM
• BCM

Combination switch
Refer to 

BCS-77, "Symptom 

Table"

.

Front wiper request signal
• BCM
• IPDM E/R

IPDM E/R
Data monitor "FR WIP REQ"

HI, LO, and INT

SYMPTOM DIAGNOSIS
Refer to 

WW-79, "Diagnosis Procedure"

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