DTC P16F5
DTC P16F5: Starter Cut Relay 1 Control Circuit High Voltage
General Description
The starter control system prevents sudden vehicle move when it is in the driving range by prohibiting starter activation while the shift lever position is in other than P or N. It also prevents damaging the starter pinion gear by prohibiting starter activation while the engine is running. If the powertrain control module (PCM) judges that the shift lever position is in other than P or N when the vehicle is turned to the START mode, the PCM prohibits the starter activation. If the vehicle is turned mistakenly while the engine is running, the PCM judges to prohibit the starter activation according to the engine speed information and stops applying power to the starter cut relays. In this system, two starter cut relays are connected in series (starter cut relay 1, starter cut relay 2) to prevent the starter from continuing to run due to a starter cut relay malfunction. To activate the starter, the starter control latch circuit and the drive cut circuit which are in the PCM are switched ON to apply power to the starter cut relays. When the starter control latch circuit ON malfunction is occurred, the drive cut circuit forcibly shuts down output to the starter control latch circuit to prevent the starter from continuing to run. If the STRLY return signal is HIGH while the starter control latch circuit is ON, the PCM detects a malfunction of the STRLY line and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD Status
| Execution | Continuous |
| Sequence | None |
| Duration | 2 seconds or more |
| DTC Type | One drive cycle, MIL off |
| OBD Status | PASSED/FAILED/NOT COMPLETED (STILL TESTING) |
Enable Conditions
| Condition | |
|---|---|
| Ignition switch or Engine start/stop button | Vehicle START mode |
Malfunction Threshold
The STRLY return signal is HIGH for at least 2 seconds when the starter is ON.
Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- Starter cut relay STRLY line short to power
- PCM internal circuit failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory. The MIL does not come on.
Conditions for clearing the DTC
The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.