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Home >> Mitsubishi >> 2012 >> Eclipse Spyder L4-2.4L (4G69) >> Repair and Diagnosis >> Body and Frame >> Body Control Systems >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Flasher Timer >> Inspection Procedure J-1

Inspection Procedure J-1




INSPECTION PROCEDURE J-1: Flasher Timer: Turn-signal lights do not flash when the turn-signal light switch is turned on.

NOTE:
This troubleshooting procedure requires the use of scan tool MB991958 and SWS monitor kit MB991813. For details on how to use the SWS monitor, refer to "How to use SWS monitor How to Use SWS Monitor."


















CIRCUIT OPERATION

- The turn-signal light switch sends a signal through the column-ECU (incorporated in the column switch) to the ETACS-ECU. If the column-ECU sends a turn-signal light switch "ON" signal to the ETACS-ECU, the ETACS-ECU turns on the flasher timer (incorporated in the ETACS-ECU), thus causing the turn-signal lights to flash.
- The ETACS-ECU flashes the turn-signal lights under the following conditions:
- Ignition key: "ON" position
- Turn-signal light switch: Left or right turn-signal position

TECHNICAL DESCRIPTION (COMMENT)

If the turn-signal lights do not flash normally, the input circuits from the switches described in "CIRCUIT OPERATION" or the ETACS-ECU may be defective. If the hazard warning lights do not flash, the power supply line to the ETACS-ECU (dedicated to the turn-signal lights) may be defective.

TROUBLESHOOTING HINTS

- Trouble in input signal system
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
- The ETACS-ECU may be defective

DIAGNOSIS

Required Special Tools:

- MB991223: Harness Set
- MB992006: Extra Fine Probe
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A
- MB991813: SWS Monitor Kit
- MB991806: SWS Monitor Cartridge
- MB991812: SWS Monitor Harness (For Column-ECU)
- MB991822: Probe Harness

STEP 1. Check the hazard warning light.

Q. Do the hazard warning lights work normally?

YES Go to Step 7.
NO Go to Step 2.
STEP 2. Check the turn-signal lights.

Q. Does either of the turn-signal lights illuminate?

Only right or left side light does not illuminate. : Go to Step 3.
Turn-signal lights do not illuminate at all : Go to Step 4.
STEP 3. Check ETACS-ECU connector C-217, junction block connectors C-203 and C-208 for loose, corroded or damaged terminals, or terminals pushed back in the connector.









Q. Are ETACS-ECU connector C-217, junction block connectors C-203 and C-208 in good condition?

YES Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Immobilizer System. Verify that the turn-signal lights illuminate normally.

NO Repair or replace the damaged component(s). Harness Connector Inspection. Verify that the turn-signal lights illuminate normally.

STEP 4. Check ETACS-ECU connector C-217 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is ETACS-ECU connector C-217 in good condition?

YES Go to Step 5.

NO Repair or replace the damaged component(s). Harness Connector Inspection. Verify that the turn-signal lights illuminate normally.

STEP 5. Check the battery power supply circuit to the ETACS-ECU. Measure the voltage at ETACS-ECU connector C-217.





(1)Disconnect ETACS-ECU connector C-217, and measure the voltage available at the junction block side of the connector.





(2)Measure the voltage between terminal 11 and ground.

- The voltage should measure approximately 12 volts (battery positive voltage).

Q. Is the measured voltage approximately 12 volts (battery positive voltage)?

YES Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Immobilizer System. Verify that the turn-signal lights illuminate normally.

NO Go to Step 6.

STEP 6. Check the wiring harness between ETACS-ECU connector C-217 (terminal 11) and the battery.

- Check the power supply line for open circuit and short circuit.













NOTE:
Also check junction block connector C-203 and intermediate connector C-24 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If junction block connector C-203 or intermediate connector C-24 is damaged, Repair or replace the damaged component(s) as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between ETACS-ECU connector C-217 (terminal 11) and the battery in good condition?

YES No action is necessary and testing is complete.

NO 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. Verify that the turn-signal lights illuminate normally.

STEP 7. Check the input signal by using "FUNCTION DIAG." menu of the SWS monitor.

Check the input signals from the following switches:

- Ignition switch: ON
- Turn-signal light switch: RH









(1)
CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect special tool MB991910 before connecting special tool MB991812. Be sure to connect special tool MB991806 after turning on special tool MB991824.

Connect the special tool. Refer to "How to connect SWS monitor How to Connect SWS Monitor."
(2)Turn the ignition switch to the "LOCK" (OFF) position.
(3)Operate scan tool MB991958 according to the procedure below to display "TURN SIG.RH."

.....Select "Interactive Diagnosis."

.....Select "System select."

.....Select "SWS."

.....Select "SWS MONITOR."

.....Select "Function Diag."

.....Select "TURN SIGNAL."

.....Select "TURN SIG.RH."
(4)Check that normal conditions are displayed for the items described in the table below.





Q. Does the scan tool MB991958 display the items "T/S RH SW" and "IG SW (IG1)" as normal condition?

Normal conditions are displayed for all the items : Go to Step 8.

Normal condition is not displayed for "T/S RH SW" : Refer to Inspection Procedure M-6 "ETACS-ECU does not receive any signal from the turn-signal light switch Inspection Procedure M-6."

Normal condition is not displayed for "IG SW (IG1)" : Refer to Inspection Procedure M-2 "ETACS-ECU does not receive any signal from the ignition switch (IG1) Inspection Procedure M-2."

STEP 8. Check the input signal by using "FUNCTION DIAG." menu of the SWS monitor.









If the Ignition switch is turned to the "ON" position and the turn-signal light switch (LH) is turned on, normal conditions should be displayed for the items described in the table below.
(1)Operate scan tool MB991958 according to the procedure below to display "TURN SIG.LH."

.....Select "Interactive Diagnosis."

.....Select "System select."

.....Select "SWS."

.....Select "SWS MONITOR."

.....Select "Function Diag."

.....Select "TURN SIGNAL."

.....Select "TURN SIG.LH."
(2)Check that normal conditions are displayed for the item described in the table below.





Q. Do the scan tool display the item "T/S LH SW" as normal condition?

YES Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Immobilizer System. Verify that the turn-signal lights illuminate normally.

NO Refer to Inspection Procedure M-6 "ETACS-ECU does not receive any signal from the turn-signal light switch Inspection Procedure M-6."

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