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8G3-16 IMMOBILIZER CONTROL SYSTEM (Z13DT ENGINE MODEL)
DTC B3043 W-Line CKT Malf (Short to Battery)
Wiring Circuit
Refer to "Immobilizer Control System Wiring Circuit Diagram" in this section.
DTC Detecting Condition and Trouble Area
DTC Detecting Condition
W-line circuit voltage is high.
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) Connect connector to ECM.
2) Measure voltage between G50-7 terminal of
Immobilizer Control Module and body
ground with ignition switch at OFF position
and scan tool disconnected referring to the
figure below.
Is it 0 – 1 V?
Action
[A]: Fig. for Step 2
1. G50-7
Trouble Area
W-line circuit
Yes
Go to Step 2.
Substitute a known-good
ECM according to "Proce-
dure for ECM replace-
ment" in this section and
recheck.
No
Repair or replace.
W-line (WHT/BLK) is
shorted to power supply
circuit.
Repair and recheck.
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