Code No.C1616: Cranking Signal Stuck


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines.
  • Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
  • When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in GROUP 54A, Immobilizer System - How to Register Key ID .)

OPERATION


4WD-ECU receives the signal of the ignition switch from ETACS-ECU via CAN communication.

DIAGNOSIS CODE SET CONDITION


This diagnosis code is set when the abnormality below is detected:

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.
Use M.U.T.-III to perform the CAN bus diagnosis.

Q. Is the check result normal?
Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ). After repairing the CAN bus line, go to Step 2.

STEP 2. Check whether the diagnosis code is reset.

Q. Is diagnosis code No.C1616 set?
Go to Step 3.
This diagnosis is complete.

STEP 3. M.U.T.-III other system diagnosis code.

  • Check the KOS diagnosis code (Refer to GROUP 42B - Troubleshooting ) <Vehicles with KOS>.
  • Check the ETACS diagnosis code (Refer to GROUP 54A - Troubleshooting ).

Q. Is the diagnosis code set?
Perform the relevant troubleshooting.
Go to Step 4.

STEP 4. M.U.T.-III data list.
Check the following data list (Refer to).

  • Item No.30: Ignition SW (CAN input)

Q. Is the check result normal?
Go to Step 8.
Go to Step 5.

STEP 5. Ignition switch check
(1)Disconnect ignition switch connector, and check the continuity between the power supply and start signal at the ignition switch side.
(2)Turn the ignition switch to the "ON" position.
OK: No continuity

Q. Is the check result normal?
Go to Step 6.
Replace the ignition switch. (Refer to GROUP 54A - Ignition Switch ). Then go to Step 9.

STEP 6. Check of short circuit in start signal line between ignition switch connector and ETACS-ECU connector.

Q. Is the check result normal?
Go to Step 7.
Repair the defective connector or the wiring harness. Then go to Step 9.

STEP 7. M.U.T.-III data list.
Check the data list of the ETACS (Refer to GROUP 54A - ETACS ).

  • Item No.287: Starter switch

Q. Is the check result normal?
Go to Step 8.
Replace the ETACS-ECU. Then go to Step 8.

STEP 8. Check whether the diagnosis code is reset.

Q. Is diagnosis code No.C1616 set?
Replace the 4WD-ECU (Refer to ). Then go to Step 9 .
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).

STEP 9. Check whether the diagnosis code is reset.

Q. Is diagnosis code No.C1616 set?
Return to Step 1.
This diagnosis is complete.