Infiniti G37 Coupe. Manual — part 566
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P1574 ICC VEHICLE SPEED SENSOR
EC-445
< COMPONENT DIAGNOSIS >
[VQ37VHR]
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P1574 ICC VEHICLE SPEED SENSOR
Description
INFOID:0000000001734269
The ECM receives two vehicle speed signals via CAN communication line. One is sent from “unified meter and
A/C amp.”, and the other is from TCM (Transmission control module). The ECM uses these signals for ICC
control. Refer to
for ICC functions.
DTC Logic
INFOID:0000000001734270
DTC DETECTION LOGIC
NOTE:
• If DTC P1574 is displayed with DTC U1000, U1001, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to
• If DTC P1574 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer
.
• If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer
.
• If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer
.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine (VDC switch OFF).
2.
Drive the vehicle at more than 40 km/h (25 MPH).
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
This procedure may be conducted with the drive wheels lifted in the shop or by driving the vehicle.
If a road test is expected to be easier, it is unnecessary to lift the vehicle.
3.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001734271
1.
CHECK DTC WITH TCM
Check DTC with TCM. Refer to
TM-111, "Diagnosis Description"
.
Is the inspection result normal?
YES
>> GO TO 2.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
P1574
ICC vehicle speed
sensor
ECM detects a difference between two vehicle
speed signals is out of the specified range.
• Harness or connectors
(The CAN communication line is open or
shorted.)
• Unified meter and A/C amp.
• ABS actuator and electric unit (control unit)
• Wheel sensor
• TCM
• ECM
EC-446
< COMPONENT DIAGNOSIS >
[VQ37VHR]
P1574 ICC VEHICLE SPEED SENSOR
NO
>> Perform trouble shooting relevant to DTC indicated.
2.
CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
BRC-26, "CONSULT-III Function"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace.
3.
CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Check combination meter function.
Refer to
MWI-37, "CONSULT-III Function (METER/M&A)"
.
>> INSPECTION END
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P1606 VVEL CONTROL MODULE
EC-447
< COMPONENT DIAGNOSIS >
[VQ37VHR]
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P1606 VVEL CONTROL MODULE
Description
INFOID:0000000001736777
The VVEL control module consists of a microcomputer and connec-
tors for signal input and output and for power supply. The VVEL con-
trol module controls VVEL system.
DTC Logic
INFOID:0000000001736778
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON and wait at least 1 second.
2.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001736779
1.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “SELF-DIAG RESULTS” mode with CONSULT-III.
3.
Touch “ERASE”.
4.
Perform DTC Confirmation Procedure.
See
.
With GST
1.
Turn ignition switch ON.
2.
Select Service $04 with GST.
3.
Perform DTC Confirmation Procedure.
JMBIA0879ZZ
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1606
VVEL control module
• VVEL control module calculation
function is malfunctioning.
• VVEL EEP-ROM system is malfunc-
tioning.
• VVEL control module
![](/vehicles/zatt/keash/ckiif/juzes.png)
EC-448
< COMPONENT DIAGNOSIS >
[VQ37VHR]
P1606 VVEL CONTROL MODULE
Is the DTC P1606 displayed again?
YES
>> GO TO 2.
NO
>> INSPECTION END
2.
REPLACE VVEL CONTROL MODULE
1.
Replace VVEL control module.
2.
EC-17, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (VVEL CONTROL MOD-
ULE) : Special Repair Requirement"
>> INSPECTION END
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