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.
Unlike the Quad Driver Modules (QDMs) used in prior model years, ODMs
have the capability of diagnosing each output circuit individually. DTC P1672
set indicates an improper voltage level has been detected on ODM D output
2, which controls the Low Engine Oil Level Lamp.
Conditions for Setting the DTC
| • | An improper voltage level has been detected on ODM D output 2
(the engine oil level lamp control driver circuit). |
| • | The condition exist for at least 30 seconds. |
Action Taken When the DTC Sets
| • | The PCM will not illuminate the MIL. |
| • | The PCM will store conditions which were present when the DTC
set as Fail Records data only. This information will not be stored as Freeze
Frame data. |
Conditions for Clearing the MIL/DTC
| • | A history DTC P1672 will clear after 40 consecutive warm-up
cycles have occurred without a fault. |
| • | DTC P1672 can be cleared by using the scan tool Clear Info function
or by disconnecting the PCM battery feed. |
Diagnostic Aids
For diagnosis of the instrument panel, perform the System Check in the
Instrument Cluster section of Electrical Diagnosis.
Check for the following conditions:
| • | The Low Oil Level Lamp will be illuminated for about a minute
when the PCM checks for low oil level and the Engine Oil Level switch indicates
that a low oil level condition exists (Engine Oil Level switch circuit not
grounded). When the ignition is first turned ON, the PCM commands the Low
Oil Level lamp ON for a brief period of time to test the bulb. To test for
low oil level at startup, the following conditions must be present: |
| - | The engine coolant temperature must be greater than 15°C (59°F). |
| - | The engine coolant temperature at key ON must be at least 12°C
(22°F) cooler than the engine coolant temperature at the last key OFF. |
| • | Poor connection at PCM or oil level sensor. 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 and turn the ignition ON. Observe
a voltmeter connected to the affected PCM output circuit while moving connectors
and wiring harnesses related to the PCM output circuit. A change in voltage
will indicate the location of the fault. |
