MARUTI SUZUKI Wagon R, Manual

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1A-65 Engine General Information and Diagnosis: Bi-Fuel LPG model
DTC U0073 (LPG Control Module)
AENAR90A1104057
Refer to “CAN DTC (Lost Communication and Communication Bus Off) Table”: in Section 10H.
DTC U0100
AENAR90A1104051
Refer to “CAN DTC (Lost Communication and Communication Bus Off) Table”: in Section 10H.
3 Fuel select switch signal circuit check
1) Turn ignition switch to OFF position and then disconnect
connector from LPG control module.
2) Check for proper terminal connection to LPG control
module connectors.
3) If connections are OK, check that fuel select switch
signal circuit (A1) is as follows.
• Wiring harness resistance of fuel select switch signal
circuit is less than 1 Ω .
• Insulation resistance of fuel select switch signal circuit
between fuel select switch connector and vehicle
body ground is infinity.
• Insulation resistance of wire harness is infinity
between fuel select switch signal circuit terminal and
each terminal at fuel select switch connector.
• Voltage of fuel select switch signal circuit is 0 – 1 V
with ignition switch in ON position.
Are they in good condition?
Go to Step 4. Repair or replace fuel
select switch signal
circuit.
4 Fuel select switch check
1) Check fuel select switch. “Selector Switch Inspection (Bi-
Fuel LPG Model)”: in Section 9C
Is it in good condition?
Substitute a known-
good LPG control
module and recheck. Replace fuel select
switch. “Selector Switch
Removal and
Installation (Bi-Fuel
Model)”: in Section 9C
Step Action Yes No