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DTC C1616: Cranking Signal Stuck
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect DTC may be stored. Prior to this diagnosis, diagnose the CAN bus lines.
  • Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
 
 
OPERATION
AWC-ECU receives the signal of the ignition switch from ETACS-ECU via CAN communication.
 
 
DTC SET CONDITION
This DTC is stored when the abnormality below is detected:
  • The cranking signal is set for 5 seconds or more continuously while driving
 
 
PROBABLE CAUSES
  • Malfunction of the ETACS-ECU
  • Ignition switch malfunction
  • Damaged harness wires and connectors
  • Malfunction of AWC-ECU
 
 
DIAGNOSTIC PROCEDURE
STEP 1. Scan tool (M.U.T.-III) CAN bus diagnostics.
Use scan tool (M.U.T.-III) to perform the CAN bus diagnosis.
Is the check result normal?
Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C - Diagnosis, Can Bus Diagnostics Table ). After repairing the CAN bus line, go to Step 2 .
 
STEP 2. Check whether the DTC is stored again.
Is DTC No.C1616 stored?
Go to Step 3.
This diagnosis is complete.
 
STEP 3. Scan tool (M.U.T.-III) other system DTC.
  • Check the KOS DTC (Refer to GROUP 42B - Diagnosis, Diagnostic Trouble Code Chart ) <Vehicles with KOS>.
  • Check the ETACS DTC (Refer to GROUP 54A - Diagnosis, Diagnostic Trouble Code Chart ).
Is the DTC stored?
Perform the relevant troubleshooting.
Go to Step 4.
 
STEP 4. Scan tool (M.U.T.-III) data list.
Check the following data list (Refer to ).
  • Item No.30: Ignition SW (CAN input)
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
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.
Is the check result normal?
Go to Step 7.
Repair the defective connector or the wiring harness. Then go to Step 9.
 
STEP 7. Scan tool (M.U.T.-III) data list.
Check the data list of the ETACS (Refer to GROUP 54A - ETACS ).
  • Item No.287: Starter switch
Is the check result normal?
Go to Step 8.
Replace the ETACS-ECU. Then go to Step 8.
 
STEP 8. Check whether the DTC is stored again.
Is DTC No.C1616 stored?
Replace the AWC-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 DTC is stored again.
Is DTC No.C1616 stored?
Return to Step 1.
This diagnosis is complete.