QX56 V8-5.6L (VK56DE) (2004)
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Low Tire Pressure Indicator: Technical Service Bulletins
Instruments - Low Tire Pressure Warning System
Classification:
WT04-008
Reference:
ITB04-028
Date:
June 9, 2004
LOW TIRE PRESSURE WARNING SYSTEM (LTPWS)
TECHNICAL INFORMATION
APPLIED VEHICLES:
All with LTPWS
SERVICE INFORMATION
LTPWS and TPMS are the same Systems. Only the name has changed.
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Old name: TPMS (Tire Pressure Monitor System)
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New name: LTPWS (Low Tire Pressure Warning System)
This bulletin provides important information for the LTPWS. Use this information:
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For correctly setting the tire air pressure.
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When inspecting an incident vehicle or when performing a PDI.
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When speaking to customers.
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To help avoid LTPWS incidents and customer concerns.
Setting The Correct Tire Pressure During PDI:
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During the PDI process set the tire pressure to the specification shown on the Tire and Loading Information Label (placard).
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Refer to the vehicle Owner's Manual for the placard location. For example on the 2004 QX56 the placard is located in the middle of the drivers side
B-pillar.
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Tire pressures should be set with the tires cold (see NOTE).
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Once the tires are set to the correct pressure confirm the following during the PDI drive check:
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The LTPWS properly operates.
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The correct tire pressure is displayed (by LTPWS).
Factors That Affect Tire Pressure: Temperature and Altitude
NOTE:
The tire pressures should be checked when the tires are COLD. The tires are considered COLD after the vehicle has been parked for 3 or more hours,
or driven less than 1 mile (1.6 km) at moderate speeds.
Cold Ambient Temperatures:
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The LTPWS measures the pressure inside the tire.
