Lancer L4-2.0L (4B11) (2008)
Body Control Module: Symptom Related Diagnostic Procedures
Inspection Procedure 1
Inspection Procedure 1: ETACS-ECU does not receive any signal from the ignition switch (ACC).
Ignition Switch (ACC) Input Circuit
TECHNICAL DESCRIPTION (COMMENT)
If there is an error to the ignition switch (ACC) input signal, or the ACC relay inside the ETACS-ECU does not operate, the ignition switch (ACC) signal
is no longer output to the communication line.
TROUBLESHOOTING HINTS
-
The ETACS-ECU may be defective.
-
The ignition switch may be defective
-
The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
DIAGNOSIS
Required Special Tools:
-
MB991223: Harness Set
-
MB992006: Extra Fine Probe
STEP 1. Check ETACS-ECU connector C-317 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is ETACS-ECU connector C-317 in good condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s) (Refer to general (electrical), Harness Connector Inspection). Check that the input signal of
ignition switch (ACC) is normal.
STEP 2. Check the ignition switch (ACC) line of the power supply circuit to the ETACS-ECU. Measure the voltage at ETACS-ECU connector
C-317.
1. Disconnect ETACS-ECU connector C-317 and measure the voltage available at the junction block side of the connector.
2. Turn the ignition switch to the "ACC" position.