Dtc B1141 / B1142 (No. 1141 / No. 1142): Outside Air Temperature (Ambient Temp.) Sensor Circuit Malfunction - Suzuki SX4 Service Manual

10B-19 Body Electrical Control System:
DTC B1141 / B1142 (No. 1141 / No. 1142): Outside Air Temperature (Ambient Temp.) Sensor Circuit
Malfunction
Wiring Diagram
[A]: BCM connector viewed from harness side
DTC Detecting Condition and Possible Cause
DTC detecting condition
DTC B1141 (DTC No. 1141):
Input signal from outside air temperature sensor is higher
than 4.88 V.
DTC B1142 (DTC No. 1142):
Input signal from outside air temperature sensor is lower
than 0.1 V.
Flow Test Description
Step 1: Check whether malfunction is in outside air temperature sensor.
Step 2: Check outside air temperature sensor circuit.
DTC Troubleshooting
Step
1 Outside air temperature sensor check
1) Turn ignition switch to OFF position.
2) Disconnect connector from outside air temperature
sensor.
3) Check outside air temperature sensor for resistance
referring to "Outside Air Temperature Sensor Inspection
(If Equipped) in Section 9C".
Is it in good condition?
2 Outside air temperature sensor circuit check
1) Disconnect connector from BCM and check for proper
terminal connection to BCM connector.
2) If connections are OK, check outside air temperature
sensor circuit for open, short and high resistance.
Is each circuit in good condition?
1
YEL/RED
E04-10
YEL/BLK E04-8
1. Outside air temperature sensor
Action
2
5V
2. BCM
Possible cause
• Open in outside air temperature sensor circuit
• Outside air temperature sensor malfunction
• BCM malfunction
• Short in outside air temperature sensor circuit
• Outside air temperature sensor malfunction
• BCM malfunction
Yes
Go to Step 2.
Substitute a known-
good BCM (included in
junction block) and
recheck.
S7RW0AA204009
[A]
E04
7 6 5 4 3 2 1
14 13 12 11 10 9 8
I6RW0CA20007-01
No
Replace outside air
temperature sensor.
Repair circuit.