C1616

DTC C1616: Cranking Signal System (ON sticking)













CAUTION:

- If there is any problem in the CAN bus lines, an incorrect diagnostic trouble 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.

OPERATION

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

DTC SET CONDITIONS

The code is set when the cranking signal is set for five 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 CAN bus diagnostics

Using scan tool MB991958, diagnose the CAN bus lines.

Q. Is the check result normal?

YES Go to Step 3.
NO Repair the CAN bus lines. CAN Bus Diagnostics Chart.) After repairing the CAN bus line, go to Step 2.
STEP 2. Check whether the DTC is reset.

Q. Is DTC No. C1616 set?

YES Go to Step 3.
NO This diagnosis is complete.
STEP 3. Scan tool diagnostic trouble code

- Check the KOS diagnostic trouble code. Keyless Operation System (KOS) .)
- Check the WCM diagnostic trouble code. Wireless Control Module (WCM) .)
- Check the ETACS diagnostic trouble code. Electronic Time and Alarm Control System (ETACS) .)

Q. Is the DTC set?

YES Perform the relevant troubleshooting.
NO Go to Step 4.
STEP 4. Scan tool service data

Item 42: Ignition switch (Refer to Service Data Reference Table Data List Reference Table.)

Q. Is the check result normal?

YES Go to Step 9.
NO Go to Step 5.
STEP 5. Ignition switch check

(1)Disconnect C-210 ignition switch connector, and check the continuity between the terminals No. 1 and No. 5 at the ignition switch side.

(2)Turn the ignition switch to the "ON" position.
OK: No continuity


Q. Is the check result normal?

YES Go to Step 6.
NO Replace the ignition switch. Service and Repair.) Then go to Step 10.
STEP 6. Ignition switch connector, ETACS-ECU connector check: C-210, C-315

Q. Is the check result normal?

YES Go to Step 7.
NO Repair the defective connector. Then go to Step 10.
STEP 7. Check the wiring harness between C-210 ignition switch connector terminal No. 5 and C-315 ETACS-ECU connector terminal No. 7.

Check the wiring harness for short circuit (short to power supply).

Q. Is the check result normal?

YES Go to Step 8.
NO Repair the wiring harness. Then go to Step 10.
STEP 8. Scan tool service data

ETACS item No. 287: Starter switch Data List Reference Table.)

Q. Is the check result normal?

YES Go to Step 9.
NO Replace the ETACS-ECU. Electronic Time and Alarm Control System (ETACS)-ECU Removal and Installation.) Then go to Step 9.
STEP 9. Check whether the DTC is reset.

Q. Is DTC No. C1616 set?

YES Replace the AWC-ECU.(Refer to Active Center Differential (ACD).) Then go to Step 10.
NO Intermittent malfunction. How to Cope With Intermittent Malfunctions.)
STEP 10. Check whether the DTC is reset.

Q. Is DTC No. C1616 set?

YES Return to Step 1.
NO This diagnosis is complete.