Lexus ES: Actuator Cut Circuit Stuck Off (P16B09F)
DESCRIPTION
The ECM monitors its internal operation. If it detects a malfunction, the electronic throttle motor circuit inside the ECM is shut off to ensure the safety of the vehicle.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P16B09F | Actuator Cut Circuit Stuck Off | ECM main CPU malfunction (1 trip detection logic). | ECM | Comes on | DTC stored | SAE Code: P16B0 |
MONITOR DESCRIPTION
When the EFI main relay is operated by the ECM after the engine switch is turned off, if the electronic throttle motor circuit is detected as not being shut off correctly, the ECM will illuminate the MIL and store this DTC.
MONITOR STRATEGY
| Related DTCs | P16B0: ECM/PCM processor performance |
| Required sensors/components (Main) | ECM |
| Required sensors/components (Related) | - |
| Frequency of operation | Once per driving cycle |
| Duration | - |
| MIL operation | Immediate |
| Sequence of operation | None |
TYPICAL ENABLING CONDITIONS
| The monitor will run whenever the following DTCs are not stored | None |
| Both of the following conditions are met | - |
| Engine switch | On (IG) to off |
| EFI Main Relay | ON |
TYPICAL MALFUNCTION THRESHOLDS
| Actuator Cut Circuit check | Fail |
CONFIRMATION DRIVING PATTERN
HINT:
- After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
-
When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.
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- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
-
Turn the engine switch off and wait for 2 minutes or more. [*1]
HINT:
[*1] : Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Turn the engine switch on (IG) and turn the Techstream on.
- Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
- Input the DTC: P16B09F.
-
Check the DTC judgment result.
Techstream Display
Description
NORMAL
- DTC judgment completed
- System normal
ABNORMAL
- DTC judgment completed
- System abnormal
INCOMPLETE
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
N/A
- Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
CAUTION / NOTICE / HINT
NOTICE:
-
Perform the universal trip to clear permanent DTCs.
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-
Perform registration and/or initialization when parts related to the automatic transaxle are replaced.
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-
After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
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PROCEDURE
| 1. | CLEAR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Powertrain > Transmission > Clear DTCsHINT:
Write down the currently output DTCs before clearing them.
(e) Turn the engine switch off.
|
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| 2. | READ OUTPUT DTC (DTC P16B09F) |
(a) Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
(b) Connect the cable to the negative (-) battery terminal.
(c) Turn the engine switch on (IG) and wait for 1 minute or more.
(d) Turn the engine switch off and wait for 2 minutes or more.
HINT:
This DTC is detected after the engine switch is turned off.
(e) Connect the Techstream to the DLC3.
(f) Turn the engine switch on (IG).
(g) Turn the Techstream on.
(h) Enter the following menus: Powertrain / Transmission / Trouble Codes.
Powertrain > Transmission > Trouble Codes(i) Read the DTCs using the Techstream.
| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTC P16B09F is output | B |
| A | .gif) | CHECK FOR INTERMITTENT PROBLEMS |
|
| 3. | REPLACE ECM |
(a) Replace the ECM.
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| NEXT | | PERFORM REGISTRATION |
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