Curiosii for ever!: Car repair manuals for everyone.
Home >> Mitsubishi >> 1999 >> Galant ES 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 >> H - Charts

H - Charts

Ignition Key Hole Illumination Light Circuit:




Connectors:






CIRCUIT OPERATION
The ETACS-ECU illuminates the ignition key hole illumination light when the ignition switch is turned to "LOCK" (OFF) or "ACC" position and the driver's door is opened.

The ignition key hole illumination light goes off 30 seconds after closing the driver's door. Also, the ignition key hole illumination light illuminates for 30 seconds after removing the ignition key.

TECHNICAL DESCRIPTION (COMMENT)
The ETACS-ECU illuminates the ignition key hole illumination light according to the input signals from the following switches:
- Ignition switch (IG1)
- Key reminder switch
- Driver's door switch

If the ignition key hole illumination light does not illuminate, the relevant input signal circuit, the key reminder switch (Ignition key hole illumination light bulb) or the ETACS-ECU may be defective.

TROUBLESHOOTING HINTS
- Malfunction of the driver's door switch
- Malfunction of the key reminder switch (Key reminder switch or ignition key hole illumination light bulb)
- Malfunction of the ETACS-ECU
- Damaged harness wires or connectors

DIAGNOSIS
Required Special Tools:
MB991223: Test Harness Set
MB991502: Scan Tool (MUT-II)
MB991529: Diagnostic Trouble Code Check Harness

STEP 1. Check the ETACS-ECU power supply circuit.
If the ignition switch is at "LOCK" (OFF) position, do all of the following functions operate?
- Ignition key reminder tone alarm function
- Light reminder tone alarm function
- Central door locking system
- Hazard warning light
- Dome light dimming function
- Theft-alarm system

If none of the functions operate, check the ETACS-ECU battery circuit. Refer to Inspection Procedure O-1.

If any of the functions operate, go to Step 2.

STEP 2. Check the input signal.
Check the input signals from the following switches:
- Ignition switch (IG1)
- Key reminder switch
- Driver's door switch






CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.

1. Connect scan tool MB991502 to the data link connector.
2. Check that the tone alarm of scan tool MB991502 sounds when the input signal enters.





1. Use special tool MB991529 to connect a voltmeter between ground terminal 4 or 5 and ETACS-ECU terminal 9 of the data link connector.
2. Check that the voltmeter indicator deflects once when the input signal.
If one of the input signal checks shows a defect, check the relevant input signal circuit.
If none of the input signal checks shows a defect, go to Step 3.




STEP 3. Check the ignition key hole illumination light circuit at the ETACS-ECU connector C-86.
1. Disconnect the ETACS-ECU connector C-86 and measure at the junction block side.
2. Turn the ignition switch to "ON" position.
3. Connect terminal 15 to the ground.
- The ignition key hole illumination light should illuminate.
If the ignition key hole illumination light does not illuminate, go to Step 4.
If the ignition key hole illumination light illuminate, replace the ETACS-ECU.
The ignition key hole illumination light should work normally.

STEP 4. Check the ignition key hole illumination light bulb.
If the ignition key hole illumination light bulb has blown, replace it.

The ignition key hole illumination light should work normally.

If the ignition key hole illumination light bulb is in good condition, go to Step 5.




STEP 5. Check the key reminder switch (ignition key hole illumination light circuit).
1. Disconnect the key reminder switch connector C-59.
2. Remove the ignition key hole illumination light bulb. Then measure the resistance between the bulb terminals.
3. Install the bulb to the key reminder switch, and then measure the resistance between connector C-59 terminals 1 and 2. The resistance reading at this time should be much the same as the resistance measured at Step (2).
If the two resistance values are extremely different each other, repair or replace the key reminder switch.
The ignition key hole illumination light should work normally.
If the two resistance values are much the same, go to Step 6.







STEP 6. Check the key reminder switch connector C-59 and ETACS-ECU connector C-86 for damage.
If the key reminder switch connector C-59 and ETACS-ECU connector C-86 are damaged, repair or replace them. Refer to Harness Connector Inspection.

The ignition key hole illumination light should work normally.

If the connectors are in good condition, go to Step 7.










STEP 7. Check the harness wires between key reminder switch connector C-59 and ETACS-ECU connector C-86.

NOTE: After checking junction block connector C-77, check the wires. If junction block connector C-77 is damaged, repair or replace it. Refer to Harness Connector Inspection.

If the harness wires between key reminder switch connector C-59 and ETACS-ECU connector C-86 are damaged, repair them.

The ignition key hole illumination light should work normally.

If the harness wires are in good condition, go to Step 8.
















STEP 8. Check the harness wires between key reminder switch connector C-59 and battery.

NOTE: After checking joint connector C-57, junction block connectors C-78 and C-84 and intermediate connector C-66 check the wires. If joint connector C-57, junction block connectors C-78 and C-84 and intermediate connector C-06 are damaged, repair or replace them. Refer to Harness Connector Inspection.

If the harness wires between key reminder switch connector C-41 and battery are damaged, repair or replace them.

The ignition key hole illumination light should work normally.
pro multis · Curiosii