Suzuki Jimny Service Manual page 409

6-52 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 "Lg/B" and "B/Bl" wire terminals.
See Fig. 2.
3) If OK, then with ignition switch ON.
Is voltage applied to "Lg/B" wire terminal about
4 – 6 V?
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?
[A] Fig. 1 for Step 2 / [B] Fig. 2 for Step 3 / [C] Fig. 3 for Step 6
Action Yes
Go to Step 5.
Go to Step 6.
Replace IAT sensor.
Replace IAT sensor.
No
"Lg/B" wire open or
shorted to power, or poor
E19-15 connection.
If wire and connection are
OK, substitute a known-
good ECM and recheck.
Go to Step 5.
"Lg/B" wire shorted to
ground.
If wire is OK, substitute a
known-good ECM and
recheck.
"Lg/B" wire open or poor
E19-10 connection.
If wire and connection are
OK, substitute a known-
good ECM and recheck.