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Home >> Mitsubishi >> 2004 >> Eclipse V6-3.0L SOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Symptom Diagnostic Procedures >> K - Charts >> Inspection Procedure K-1

Inspection Procedure K-1

Flasher Timer: Turn-signal Lights does not Flash when the Turn-signal Light Switch is Turned On.

NOTE: This troubleshooting requires use of scan tool MB991958 and SWS monitor kit MB991862. For details of how to use the SWS monitor, refer to "How to use SWS monitor." How To Use SWS Monitor

Turn-Signal Light Power Supply Circuit Part 1:




Turn-Signal Light Power Supply Circuit Part 2:






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 operates the turn-signal lights according to the following signals:
- Ignition switch (IG1): ON
- Turn-signal light switch: ON

- 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)
Is 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
- Malfunction of column switch (turn-signal light and lighting switch)
- Malfunction of the ETACS-ECU
- Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:
- MB991223: Harness Set
- MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: Vehicles communication interface
- MB991827: MUT-III USB cable
- MB991911: MUT-III Main harness B
- MB991813: SWS monitor kit
- MB991806: SWS monitor cartridge
- MB991812: SWS monitor harness (for column-ECU)
- MB991922: 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-119, junction block connectors C-101, C-108 and C-112 for damage.

Q: Are ETACS-ECU connector C-119, junction block connectors C-101, C-108 and C-112 in good condition?

YES: Replace the ETACS-ECU. Check that the turn-signal lights illuminate normally.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the turn-signal lights illuminate normally.

STEP 4. Check at ETACS-ECU connector C-119 in order to check the power supply circuit to the ETACS-ECU (battery power supply).




1. Disconnect ETACS-ECU connector C-119, and measure at the junction block side.




2. Measure the voltage between terminal 11 and ground.
- The measured value should be approximately 12 volts (battery positive voltage).

Q: Does the measured voltage correspond with this range?

YES: Replace the ETACS-ECU. Check that the turn-signal lights illuminate normally.

NO: Go to Step 5.




STEP 5. Check ETACS-ECU connector C-119 for damage.

Q: Is ETACS-ECU connector C-119 in good condition?

YES: Go to Step 6.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the turn-signal lights illuminate normally.










STEP 6. Check the wiring harness between ETACS-ECU connector C-119 (terminal 11) and the battery.

NOTE: Also check junction block connector C-112 and intermediate connector C-89. If junction block connector C-112 or intermediate connectors C-89 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between ETACS-ECU connector C-119 (terminal 11) and the battery in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. Check 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

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 MB991911 before connecting special tool MB991812. Be sure to connect special tool MB991806 after turning on special tool MB991824.







1. 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."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "Function Diag."
f. Select "TURN SIGNAL."
g. Select "TURN SIG.RH."




4. Check that normal conditions are displayed on the items described in the given table.

Q: Does the scan tool 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.

The scan tool does not show the respective normal condition for item "T/S RH SW": Refer to Inspection Procedure O-7 "ETACS-ECU does not receive any signal from the taillight switch, the headlight switch, the passing light switch, the dimmer switch, the turn-signal light switch or switch."

The scan tool does not show the respective normal condition for item "IG SW (IG1)": Refer to Inspection Procedure O-2 "ETACS-ECU does not receive a signal from the ignition switch (IG1)."

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 on the items described in the given table.

1. Operate scan tool MB991958 according to the procedure below to display "TURN SIG.LH."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "Function Diag."
f. Select "TURN SIGNAL."
g. Select "TURN SIG.LH."




2. Check that normal conditions are displayed for the item described in the given table.

Q: Do the scan tool display the items "T/S LH SW" is normal condition?

YES: Replace the ETACS-ECU. The ignition key reminder tone alarm function should work normally.

NO: Refer to Inspection Procedure O-7 "ETACS-ECU does not receive any signal from the taillight switch, the headlight switch, the passing light switch, the dimmer switch, the turn-signal light switch or switch."
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