Suzuki Wagon R Manual page 3575

8G3-12 IMMOBILIZER CONTROL SYSTEM (Z13DT ENGINE MODEL)
DTC B3043 W-Line CKT Malf (Short to Battery)
Wiring Circuit
Refer to "Wiring Circuit" 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
E88-88 terminal.
Is it in good condition?
2 1) Connect connector to ECM.
2) Measure voltage between G17-7 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. G17-7
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) is shorted
to power supply circuit.
Repair and recheck.