Suzuki Baleno Manual page 1696

6E1-32 ELECTRONIC FUEL INJECTION SYSTEM (G13/G16 ENGINE WITHOUT WU TWC)
CODE NO.23 IAT SENSOR (INTAKE AIR TEMPERATURE SENSOR) CIRCUIT
(LOW TEMPERATURE INDICATED, SIGNAL VOLTAGE HIGH)
1) Disconnect IAT sensor coupler with ignition switch
OFF.
2) With ignition switch ON, check voltage at "Gr/R" wire
terminal of IAT sensor coupler.
Is it about 4 – 5V?
1) Using service wire, connect IAT sensor coupler termi-
nals.
2) Check voltage at "Gr/R" wire terminal of IAT sensor
coupler with ignition switch ON.
Is it below 0.15V?
Faulty IAT sensor or poor IAT sensor-to-coupler connec-
tion.
If IAT sensor and connection are OK, intermittent
trouble or faulty ECM (PCM). Recheck referring to
"INTERMITTENT AND POOR CONNECTION" in Sec-
tion 0A.
NOTE:
Upon completion of inspection and repair work, perform final check, referring to "FINAL CHECK" in this section to
confirm that the trouble has been corrected.
YES
YES
1. ECM (PCM)
2. ECM (PCM) coupler
3. IAT sensor
4. IAT sensor coupler
5. To other sensors
NO
"Gr/R" wire open, poor C11 connector or "Gr/R" wire
shorted to power circuit.
If wire and connection are OK, substitute a known-
good ECM (PCM) and recheck.
NO
"G/R" wire open or poor C12 connection.
If wire and connection are OK, substitute a known-
good ECM (PCM) and recheck.
1. IAT sensor coupler
disconnected
2. Engine ground
1. IAT sensor coupler
disconnected
2. Service wire
3. Engine ground