Galant LS V6-3.0L SOHC (1999)
-
Malfunction of the ETACS-ECU
DIAGNOSIS
Required Special Tools:
MB991223: Harness Set
MB991502: Scan Tool (MUT-II)
MB991529: Diagnostic Trouble Code Check Harness
CAUTION: To prevent damage to scan tool MB991502, make sure that the ignition switch is "OFF" before connecting or disconnecting the scan tool.
STEP 1. Check the input signal from the ignition switch, using either the scan tool or voltmeter.
-
Using scan tool MB991502
1. Connect Scan Tool MB991502 to the data link connector.
2. Check that the tone alarm of the scan tool sounds when the ignition key is moved from the "LOCK" position to the "ON" position.
If the tone alarm of the scan tool does not sound, the input signal from the ignition switch is not normal. Go to Step 2.
If the tone alarm of the scan tool sounds when the ignition key is moved from the "LOCK" position to the "ON" position, the ignition switch
input signal is normal. Replace the ETACS-ECU. Then check that the malfunction is eliminated.
-
Using a voltmeter
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. If a voltmeter indicator deflects once when the ignition key is moved from the "LOCK" position to the "ON" position, the ETACS-ECU input
signal for the ignition switch circuit system is normal.
If the input signal of the ignition switch is not normal, go to Step 2.
STEP 2. Check the ignition switch input circuit
1. Remove the instrument panel side cover.
2. Disconnect ETACS-ECU connector C-86.
3. Turn the ignition switch "ON."
4. Measure the voltage between ETACS-ECU connector C-86 terminal number 11 and ground.
-
Voltage should be approximately 12 volts (battery positive voltage)
If approximately 12 volts, replace the ETACS-ECU. Check that the malfunction is eliminated.
If not approximately 12 volts, go to Step 3.