Circuit/System Testing
IMPORTANT:
Additional DTCs will set when disconnecting the components.
- Ignition OFF, disconnect the harness connector of all appropriate sensors for the applicable DTC.
- Ignition ON, measure for 4.8-5.2 volts between one of the 5-volt reference circuits and ground.
- If the voltage is less than the specified value, test for a short to ground on all the 5-volt reference circuits. If all circuits test normal, replace the control module.
- If the voltage is greater than the specified value, test for a short to voltage on all the 5-volt reference circuits, or the signal circuit, for each component associated with the appropriate 5-volt reference circuit. If all circuits test normal, replace the control module.
- Connect each component associated with the 5-volt reference circuit, one at a time, while monitoring the voltage. The voltage should not change more than 1 volt.
- If the voltage display changes more than the specified value when a component is connected, replace the component.
IMPORTANT:
A short to voltage on the signal circuit of certain components may cause this DTC to set.