Conditions for Setting the DTC

The GPCM detects a variation between the battery positive voltage circuit to the GPCM, Ignition 1 signal circuit and/or the ECM voltage circuit for 130 ms. The following conditions will set the DTC:

• GPCM battery positive voltage circuit is greater than 16.5 V and ignition 1 signal circuit is between 9-14 V.
• GPCM battery positive voltage circuit is less than 6 V and ignition 1 signal circuit is between 9-16 V.
• The difference between the GPCM battery positive voltage circuit and ignition 1 signal circuit is greater than 5 V during glow plug operation.
• The difference between the GPCM battery positive voltage circuit and the ECM voltage circuit is greater than 3 V during glow plug operation.