Inspection Procedure B-1: Lamp reminder buzzer function does not work normally.


caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.


COMMENTS ON TROUBLE SYMPTOM


The ETACS-ECU operates this function in accordance with the input signals below.

If this function does not work normally, these input signal circuit(s) or the ETACS-ECU may be defective.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III diagnosis code.


Check that ETACS-ECU sets a diagnosis code.

Q. Is the diagnosis code set?

Refer to diagnosis code chart .

Go to Step 2.

STEP 2. M.U.T.-III data list


Check the input signals below, which are related to the lamp reminder buzzer function.

Item No.
 Item name
 Normal condition
03
 Tail lamp switch
 ON
19
 Driver’s Door switch
 ON
30
 Ignition Switch (IG1)
 OFF
OK: Normal conditions are displayed for all the items.

Q. Is the check result normal?

YES <All the signals are received normally.> : Go to Step 3.

NO <The ignition switch (IG1) signal is not received.> : Refer to inspection procedure J-3 "The ignition switch (IG1) signal is not received ."

NO <The driver’s door switch signal is not received.> : Refer to inspection procedure J-7 "The front door switch signal is not received <COLT (LH drive vehicles)>, <COLT CZ3 (LH drive vehicles)>, <COLT (RH drive vehicles)> or <COLT CZ3 (RH drive vehicles)>."

NO <The tail lamp switch signal is not received.> : Refer to Inspection Procedure J-1 "The column switch (lighting and wiper switch) signal is not received ."

STEP 3. Retest the system.


The lamp reminder buzzer function should work normally.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Replace the ETACS-ECU. Then perform the variant coding and write the VIN data (Refer to GROUP 00, Precautions Before Service - How to Perform Variant Coding ).