P1650

DTC P1650 Quad Driver Module A Fault

Circuit Description
The Quad Driver Module (QDMs) are used by the powertrain control module (PCM) to turn ON current-driven devices that are needed to control two engine functions. The PCM monitors open or short circuit of either of Canister Control Purge (CCP) Vent solenoid or Variable Intake Manifold (VIM).

Conditions for Setting the DTC
- Ignition ON.
- Engine running.
- No DTC 1618.
- Ignition voltage.
- Output voltage does not equal voltage is not less than 1 volt when out put is ON.
- Above conditions occur for at least 0.5 second.

Action Taken When the DTC Sets
- The PCM will not illuminate the malfunction indicator lamp (MIL).
- The PCM will store conditions which were present when the DTC was set as Failure Records only. This information will not be stored as Freeze Frame data.

Conditions for Clearing the MIL/DTC
- The PCM will turn the MIL OFF on the third consecutive trip cycle during which the diagnostic has been run and the fault condition is no longer present.
- A history DTC P1650 will clear after 40 consecutive warm-up cycles have occurred without a fault.
- DTC P1650 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 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 to the suspect driver circuit at the PCM harness connector while moving connectors and wiring harnesses relates to the MIL. A change in voltage will indicate the location of the fault.
- Poor connection at component - Examine for damaged connectors, unplugged connector, or damaged terminals at the following locations: canister purge solenoid, fuel level sensor. An open ignition feed circuit at any of these components will cause DTC P1650 to be set.

Reviewing the Failure 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.

The following PCM pins are controlled by quad driver modules (QDMs):
- C11: Variable Intake Manifold
- C13: Canister Cut Valve

Steps 1 - 6:

Steps 7 - 13:

Steps 14 - 15:

Test Description
Number(s) below refer to the step number(s) on the Diagnostic Chart.
4. The Tech 2 Driver Module Status indicates the PCM pin that is affected.
9. The Tech 2 may indicate short circuit even when the problem is an open circuit. The cause of an open circuit may be in the component itself.
11. A short to ground on the ignition side of the component will blow the fuse. Since the fuse was checked in Step 2, a short to ground would be between the affected component and the PCM.