P1682
DTC P1682
CIRCUIT DESCRIPTION
The throttle actuator control (TAC) system uses an ignition voltage supply separate from the engine control module (ECM) supply. If the ECM detects a voltage difference between the two circuits, this DTC will set.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P1682 Ignition 1 Switch Circuit 2
CONDITIONS FOR RUNNING THE DTC
- The ignition is ON.
- DTC P1682 runs continuously when the above condition is met.
CONDITIONS FOR SETTING THE DTC
- The ignition 1 voltage is less than 10 volts.
- The above condition is present for more than 1.6 seconds.
ACTION TAKEN WHEN THE DTC SETS
- The control module stores the DTC information into memory when the diagnostic runs and fails.
- The malfunction indicator lamp (MIL) will not illuminate.
- The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records.
- The driver information center, if equipped, may display a message.
CONDITIONS FOR CLEARING THE DTC
- A current DTC Last Test Failed clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic.
- Clear the DTC with a scan tool.
TEST
