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8G3-14 IMMOBILIZER CONTROL SYSTEM (Z13DT ENGINE MODEL)
DTC B3040 W-Line Communication Fail
Wiring Circuit
Refer to "Immobilizer Control System Wiring Circuit Diagram" in this section.
DTC Detecting Condition and Trouble Area
DTC Detecting Condition
No response from ECM while Immobilizer Control
Module requests signal
Troubleshooting
Step
1
1) Ignition switch at OFF position.
2) Disconnect connector from ECM.
3) Check for proper connection to ECM at
E27-88 terminal.
Is it in good condition?
2
1) Ignition switch at OFF position.
2) Disconnect connector from Immobilizer
Control Module.
3) Check for proper connection to Immobilizer
Control Module at G50-7 terminal.
Is it in good condition?
3
With connectors connected, measure voltage
between terminal G50-7 and ground with igni-
tion switch at ON position.
Is it 10 - 14 V?
4
With ignition switch at ON position, measure
voltage between E27-4, E27-5, or E27-6 and
ground.
Are they 10 - 14 V?
Action
Trouble Area
• W-line circuit
• ECM power circuit
Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Substitute a known-
good ECM according to
"Procedure for ECM
replacement" in this sec-
tion and recheck.
No
Repair or replace.
Repair or replace.
W-line (WHT/BLK) circuit
open.
ECM power supply (BLK/
RED) circuit open.
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