STEP 1. Check the customization function.
STEP 2. Using scan tool MB991958, read the diagnostic trouble code.
(1) caution | To prevent damage to scan tool MB991958, always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool MB991958. |
Connect scan tool MB991958. Refer to "How to connect scan tool (M.U.T.-III)
."
(2) Turn the power supply mode of the engine switch to ON.
(3) Check whether the KOS-ECU related DTC is set.
(4) Turn the power supply mode of the engine switch to OFF.
Is the DTC set?
Diagnose the KOS-ECU. Refer to diagnostic trouble code chart . Go to Step 3.
STEP 3. Using scan tool MB991958, read the actuator test.
(1) caution | To prevent damage to scan tool MB991958, always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool MB991958. |
Connect scan tool MB991958. Refer to "How to connect scan tool (M.U.T.-III)
."
(2) Turn the power supply mode of the engine switch to ON.
(3) Check that the outer tone alarm sounds (Refer to ). (4) Turn the power supply mode of the engine switch to OFF.
Is the DTC set?
Go to Step 6. Replace the outer tone alarm. Go to Step 4.
STEP 4. Check KOS-ECU connectors C-08, C-10 and outer tone alarm connector G-15 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
STEP 5. Check the wiring harness between KOS-ECU connector C-08 (terminal No. 33) and outer tone alarm connector G-15 (terminal No. 1), between KOS-ECU connector C-10 (terminal No. 5) and outer tone alarm connector G-15 (terminal No. 2).
- Check the power supply and ground lines for open circuit.
note | Also check intermediate connectors C-26, C-27, G-20 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connectors C-26, C-27, G-20 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection . |
Are the wiring harness between KOS-ECU connector C-08 (terminal No. 33) and outer tone alarm connector G-15 (terminal No. 1), between KOS-ECU connector C-10 (terminal No. 5) and outer tone alarm connector G-15 (terminal No. 2) in good condition?
Go to Step 6. The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check that the outer tone alarm works normally.
STEP 6. Check of the troubles