Test Description

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

1. 2. Listen for a click when the fuel pump relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
2. 4. This step verifies that the PCM is providing voltage to the fuel pump relay.
3. 5. This step tests for an open in the ground circuit to the fuel pump relay.
4. 6. This step tests if voltage is constantly being applied to the control circuit of the fuel pump relay.

Fig 1: DTC P0230 (1 Of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC P0230 (2 Of 2)

Courtesy of GENERAL MOTORS CORP.