Suzuki SWIFT RS415 2017, Service Manual

Page: 1218 / 1257

10B-18 Body Electrical Control System:
DTC B1141 / DTC B1142 / DTC B1143 (No.1141 / No. 1142/ No. 1143) Outside Air Temperature
(Ambient Temp.) Sensor Circuit Malfunction
S4RS0AA204022
Wiring Diagram
DTC Detecting Condition and Possible Cause
Flow Test Description
Step 1:
Check whether malfunction is in outside air temperature sensor.
Step 2: Check outside air temperature sensor input circuit.
Step 3: Check outside air temperature sensor ground circuit (for DTC B1141 and B1143).
I4RS0AA20010-
[A]: BCM connector viewed from harness side 3. Junction block assembly
1. Outside air temperature sensor 4. Outside air temperature sensor connector
2. BCM
DTC detecting condition Possible cause
DTC B1141 (DTC No. 1141):
Input signal from outside air temperature sensor is higher
than 4.88 V.
• Open in outside air temperature sensor circuit
• Outside air temperature sensor malfunction
• BCM malfunction
DTC B1142 (DTC No. 1142):
Input signal from outside air temperature sensor is lower
than 0.1 V.
• Short in outside air temperature sensor circuit
• Outside air temperature sensor malfunction
• BCM malfunction
DTC B1143 (DTC No. 1143):
Input signal from outside air temperature sensor is 0.1 -
0.27 V or 4.6 - 4.88 V.
• High resistance in outside air temperature sensor
circuit
• Outside air temperature sensor malfunction
• BCM malfunction