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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1699 (ENGINE CONTROLS AND FUEL - 6.6L - DTC P1448 TO DTC P2510)DTC P154BCIRCUIT/SYSTEM DESCRIPTION
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Circuit/System Description

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Circuit/System Description
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The intake air heater (IAH) is located in the air inlet tube and is used to warm the incoming air to aid in starting the engine and for proper cylinder combustion. The glow plug control module (GPCM) will command the IAH ON when the engine coolant temperature is below 40°C (104°F). The IAH is connected to the GPCM by the following circuits:

  • The IAH temperature signal circuit
  • The IAH command 1 circuit
  • The IAH command 2 circuit
  • The IAH voltage signal circuit
  • The IAH current signal circuit
  • The IAH feedback signal circuit
  • If there is a fault on any of these circuits, a DTC will set.

Power to the IAH is supplied by the battery positive voltage circuit. An open/high resistance or a short to ground on this circuit will also set DTC P154B.

RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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