Dtc "C21" (P0110-H/L): Iat Sensor Circuit Malfunction - Suzuki AN400 Service Manual

1A-39 Engine General Information and Diagnosis:

DTC "C21" (P0110-H/L): IAT Sensor Circuit Malfunction

Detected Condition and Possible Cause
Detected Condition
Output voltage is not with in the following range.
0.2 V ≤ Sensor voltage < 4.9 V
NOTE
• If SDS is used, P0110-H is indicated when
sensor voltage is higher than specified
value.
• If SDS is used, P0110-L is indicated when
sensor voltage is lower than specified
value.
Wiring Diagram
IAT sensor
Troubleshooting
CAUTION
!
When using the multi-circuit tester, do not strongly touch the terminal of the ECM coupler with a
needle pointed tester probe to prevent the terminal damage or terminal bend.
NOTE
• After repairing the trouble, clear the DTC using SDS tool. Refer to "Use of SDS Diagnosis Reset
Procedures (Page1A-15)".
• IAT sensor resistance measurement method is the same way as that of the ECT sensor. Refer to "IAT
Sensor Inspection in Section 1C (Page1C-4)" for details.
Possible Cause
• AT sensor circuit open or short
• IAT sensor malfunction
• ECM malfunction
NOTE
• When P0110-H is displayed, it is possible that
IAT sensor circuit is open or ground circuit is
open.
• When P0110-L is displayed, it is possible that
IAT sensor circuit is shorted to ground.
B/Bl
B/Br
B705H11104021
ECM
(25)
IAT
(4)
E2
I705H1110024-01