Typical Enabling Conditions
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| Monitor runs whenever the following DTCs are not stored | None |
| All of the following conditions are met | - |
| Either of the following conditions is met | 1 or 2 |
| 1. Both of the following conditions are met | (a) and (b) |
| (a) Last thermostat heater output terminal voltage level | Low |
| (b) Current thermostat heater output terminal voltage level | Low |
| 2. Both of the following conditions are met | (c) and (d) |
| (c) Last thermostat heater output terminal voltage level | High |
| (d) Current thermostat heater output terminal voltage level | High |
| Auxiliary battery voltage | 8 V or higher |
| Command to thermostat heater | Off |