Infiniti G37 Coupe. Manual — part 950
MWI-146
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Fail Safe
INFOID:0000000001889450
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
MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-147
< 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.
MWI-148
< 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:0000000001889451
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
×
B2098: IGN RELAY ON
×
B2099: IGN RELAY OFF
—
B2108: STRG LCK RELAY ON
—
B2109: STRG LCK RELAY OFF
—
B210A: STRG LCK STATE SW
—
B210B: START CONT RLY ON
—
B210C: START CONT RLY OFF
—
B210D: STARTER RELAY ON
—
B210E: STARTER RELAY OFF
—
B210F: INTRLCK/PNP SW ON
—
B2110: INTRLCK/PNP SW OFF
—
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THE FUEL GAUGE POINTER DOES NOT MOVE
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SYMPTOM DIAGNOSIS
THE FUEL GAUGE POINTER DOES NOT MOVE
Description
INFOID:0000000001606711
Fuel gauge needle will not move from a certain position.
Diagnosis Procedure
INFOID:0000000001606712
1.
CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL
1.
Connect the CONSULT-III.
2.
Select the “Data Monitor” of the “METER/M&A” and compare the “FUEL METER” monitor value with the
fuel gauge reading on the combination meter. Refer to
MWI-54, "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
Check the fuel level sensor signal circuit. Refer to
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK FUEL LEVEL SENSOR UNIT
Check the fuel level sensor unit. Refer to
MWI-55, "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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