DTC Advanced Diagnostics: P16F4 (3.0L Engine)
DTC P16F4: Starter Cut Relay 2 Control Circuit Low Voltage
General Description
The starter motor is controlled by on/off of starter cut relay 1 and starter cut relay 2 to start the engine. The monitor circuit in the powertrain control module (PCM) monitors the voltage level of the ST_CUT_RLY2_CL- terminal. If the voltage level is abnormal, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 5 seconds or more |
| DTC Type | One drive cycle, MIL off |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage [Battery] | 9.2 V | - |
| Starter | Off | |
| Vehicle | ON mode | |
[ ]: HDS Parameter
Malfunction Threshold
The ST_CUT_RLY2_CL- terminal voltage level is on (low voltage) for at least 5 seconds despite the PCM outputs off to starter cut relay 2.
Possible Cause
- Starter cut relay 2 circuit ST_CUT_RLY2_CL- line short to ground
- Starter cut relay 2 circuit ST_CUT_RLY2_CL- line open
- PCM internal circuit failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, a Pending DTC, a Confirmed DTC, the freeze data, and the on-board snapshot are stored in the PCM memory. The MIL does not come on.
Conditions for clearing the DTC
The Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.