Refer to
EVAP and EGR Controls
schematic.
Circuit Description
Output Driver Modules (ODMs) are used by the PCM to turn on many of the current-driven devices that are needed to control various engine and Transaxle functions. Each ODM is capable of controlling up to 7 separate outputs by applying ground to the device which the PCM is commanding on. DTC P1676 set indicates an improper voltage level has been detected on the output circuit which controls the EVAP purge solenoid.
Conditions for Setting the DTC
| • | The ignition is on. |
| • | An improper voltage level has been detected on the output circuit which controls the EVAP purge solenoid. |
| • | The above conditions are present for at least 30 seconds. |
Action Taken When the DTC Sets
| • | The PCM will illuminate the MIL during the second consecutive trip in which the diagnostic test has been run and failed. |
| • | The PCM will store conditions which were present when the DTC set as Freeze Frame and Fail Records data. |
Conditions for Clearing the MIL/DTC
| • | The PCM will turn the MIL off during the third consecutive trip in which the diagnostic has been run and passed. |
| • | The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction. |
| • | The DTC can be cleared by using the scan tool Clear Info function or by disconnecting the PCM battery feed. |
Diagnostic Aids
Check for the following conditions:
| • | Poor connection at the PCM. |
| • | Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection. |
| • | Damaged harness. |
| • | Inspect the wiring harness for damage. If the harness appears to be OK, disconnect the PCM, turn the ignition ON and observe a voltmeter connected between the EVAP purge solenoid control circuit and ground at the PCM harness connector while moving connectors and wiring harnesses related to the EVAP purge solenoid. A change in voltage will indicate the location of the malfunction. |
Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
Test Description
The numbers below refer to the step numbers on the Diagnostic Table.
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An IPC theft deterrent DTC being set would indicate that the Theft Deterrent System is faulty and not sending a password to the PCM. Refer to Theft deterrent System.
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After any theft deterrent System parts have been replaced, the PCM must relearn the Password from these components. Refer to Password Learn Procedure.
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The UART serial data circuit must be OK so the IPC can send the password information to the PCM.
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Replacement PCM must be reprogrammed. Refer to the latest Techline information for programming procedures.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | ||
2 |
Was an IPC DTC also set? | -- | Go to applicable DTCs | |
Were any Passlock System related components just replaced? | -- | |||
Does the engine start and continue to run? | -- | Go to Diagnostic System Check - Theft Deterrent in Theft Deterrent | ||
Was a problem found? | -- | |||
|
Important: The replacement PCM must be programmed. Replace the PCM. Refer to Powertrain Control Module Replacement/Programming . Is the action complete? | -- | -- | ||
7 |
Does the scan tool indicate that this diagnostic ran and passed? | -- | ||
8 | Check if any additional DTCs are set. Are any DTCs displayed that have not been diagnosed? | -- | Go to applicable DTC table | System OK, Go to Diagnostic Aids |
