Suzuki Ignis Service Manual page 430

6-56 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Step
3 Check Wire Harness.
1) Disconnect IAT sensor connector with igni-
tion switch OFF.
2) Check for proper connection to IAT sensor
at "LT GRN/BLK" and "ORN" wire terminals.
3) If OK, then with ignition switch ON, is volt-
age applied to "LT GRN/BLK" wire terminal
about 4 – 6 V? See Fig. 2.
4 Does scan tool indicate – 40°C (– 40°F) at Step
2.
5 Check Wire Harness
1) Check intake air temp. displayed on scan
tool with ignition switch ON.
Is – 40°C (– 40°F) indicated?
6 Check Wire Harness.
1) Using service wire, connect IAT sensor con-
nector terminals.
2) Check intake air temp. displayed on scan
tool with ignition switch ON. See Fig. 3.
Is 119°C (246°F) indicated?
Fig. 1 for Step 2
Fig. 2 for Step 3
Action Yes
Go to Step 5.
Go to Step 6.
Replace IAT sensor.
Replace IAT sensor.
No
"LT GRN/BLK" wire open
or shorted to power, or
poor C42-15 connection.
If wire and connection are
OK, substitute a known-
good ECM and recheck.
Go to Step 5.
"LT GRN/BLK" wire
shorted to ground.
If wire is OK, substitute a
known-good ECM and
recheck.
"LT GRN/BLK" wire open
or poor C42-10 connec-
tion.
If wire and connection are
OK, substitute a known-
good ECM and recheck.