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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1493 (Engine Cooling System) >> Diagnostic Information and Procedures >> DTC P0480 or P0481 >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. Listen for an audible click when the cooling fan 1 relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
  2. Listen for an audible click when the cooling fan 2 and cooling fan 3 relays operate. Command both the ON and OFF states. Repeat the commands as necessary.
  3. Tests for voltage at the coil side of the cooling fan 1 relay. The COOL FAN #1 fuse supplies battery positive voltage to the coil side of the cooling fan 1 relay.
Fig 1: Diagnostic System Check - DTC P0480 Or P0481 (Steps 1-11)
G01500912Courtesy of GENERAL MOTORS CORP.
Fig 2: Diagnostic System Check - DTC P0480 Or P0481 (Steps 12-21)
G01500913Courtesy of GENERAL MOTORS CORP.
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