Infiniti QX56 (Z62). Manual - part 636
EC-522
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
SNOW MODE SWITCH
SNOW MODE SWITCH
Description
INFOID:0000000006256403
The snow mode switch signal is sent to the combination meter from the snow mode switch. The combination
meter then sends the signal to the ECM via the CAN communication line.
The snow mode is used for driving or starting the vehicle on snowy roads or slippery areas. If the snow mode
is activated, the vehicle speed will not accelerate as quickly as normal to avoid vehicle slip. In other words,
ECM controls rapid engine torque change by controlling the electric throttle control actuator operating speed.
Component Function Check
INFOID:0000000006256404
1.
CHECK SNOW MODE SWITCH FUNCTION
1.
Turn ignition switch ON.
2.
Select “SNOW MODE SW” in “DATA MONITOR” mode with CONSULT-III.
3.
Check “SNOW MODE SW” indication under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000006256405
1.
CHECK DTC WITH COMBINATION METER
MWI-30, "CONSULT-III Function"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Go to
.
2.
CHECK SNOW MODE SWITCH POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect snow mode switch harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between snow mode switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
• Fuse block harness connector M3
• 10 A fuse (No. 13)
• Harness for open or short between snow mode switch and fuse.
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK SNOW MODE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
Monitor item
Condition
Indication
SNOW MODE SW
Snow mode switch
ON
ON
OFF
OFF
Snow mode switch
Ground
Voltage
Connector
Terminal
M54
12
Ground
Battery voltage