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.

DTC P1682

Step	Action	Values	Yes	No
Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	-	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Turn ON the ignition, with the engine OFF. IMPORTANT: Operating the throttle blade with the Throttle Blade Control function of the scan tool may cause additional DTCs to set. Do not attempt to diagnose DTCs set during this function. With a scan tool, command the throttle blade to 100 percent and back to 0 percent. Exit the throttle blade control function. Did the throttle blade angle follow the commanded angle?	-	Go to Step 3	Go to Step 4
3	Observe the Freeze Frame/Failure Records data for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC, as specified in the supporting text, or as close to the Freeze Frame/Failure Records data that you observed. Does the DTC fail this ignition?	-	Go to Step 4	Go to Intermittent Conditions
4	With a test lamp connected to ground, probe both sides of the ETC/TAC fuse. Does the test lamp illuminate on both sides of the fuse?	-	Go to Step 5	Go to Step 6
5	With a test lamp connected to ground, probe both sides of the Powertrain Control Module (PCM) fuse. Does the test lamp illuminate on both sides of the fuse?	-	Go to Step 10	Go to Step 8
6	Test the Electronic Temperature Control (ETC)/Throttle Actuator Control (TAC) ignition 1 voltage circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 16	Go to Step 7
7	Test the supply voltage to the ETC/TAC fuse for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. If a short to ground is found, replace the affected fuse. Did you find and correct the condition?	-	Go to Step 16	Go to Step 10
8	Test the PCM ignition 1 voltage circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 16	Go to Step 9
9	Test the supply voltage to the PCM fuse for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. If a short to ground is found, replace the affected fuse. Did you find and correct the condition?	-	Go to Step 16	Go to Step 10
10	Disconnect the PCM connector containing the ETC ignition 1 voltage. With a DMM connected to ground, measure the voltage on the ETC ignition 1 voltage circuit. Does the voltage measure near the specified value?	12 V	Go to Step 11	Go to Step 12
11	Disconnect the PCM connector containing the PCM ignition 1 voltage. With a DMM connected to ground, measure the voltage on the PCM ignition 1 voltage circuit. Does the voltage measure near the specified value?	12 V	Go to Step 14	Go to Step 13
12	Test the ETC/TAC ignition 1 voltage circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 16	Go to Step 13
13	Test the PCM ignition 1 voltage circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 16	Go to Step 14
14	Test for poor connections at the PCM connectors. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 16	Go to Step 15
15	Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement?	-	Go to Step 16	-
16	Use a scan tool to clear the DTCs. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC, as specified in the supporting text. Does the DTC run and pass?	-	Go to Step 17	Go to Step 2
17	With a scan tool, observe the stored information, Capture Info. Does the scan tool display any DTCs that you have not diagnosed?	-	Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information	System OK