Suzuki Baleno Manual page 1721

B-10 A/C SIGNAL CIRCUITS CHECK (VEHICLE WITH A/C ONLY)
STEP
Check voltage at A14 terminal.
Are check results as specified below?
A/C switch ON: 0 – 1.5V
A/C switch OFF: 10 – 14V
1
NOTE:
When evaporator thermistor temperature is below
1_C (34_F), A/C is not turn ON (A14 terminal volt-
age is not become about 0V). It is not abnormal.
Check voltage at A8 terminal.
Are check results as specified below?
While engine running and A/C switch ON: 10 – 14V
While engine running and A/C switch OFF: 0 – 1.5V
2
Fig. for STEP 1
ELECTRONIC FUEL INJECTION SYSTEM (G13/G16 ENGINE WITHOUT WU TWC) 6E1-57
ACTION
1. ECM (PCM) coupler connected
2. Body ground
1. ECM (PCM)
2. A/C amplifier
3. TP sensor signal
4. ECT sensor signal
5. CKP sensor signal
6. Engine start signal
7. Sensor information
(Refer to Section 1B)
YES
Go to Step 2.
A/C control signal
circuit is in good
condition.
Fig. for STEP 2
NO
D "Lg/B" wire open or
short
D Poor A14 connection
D Poor A/C Amplifier
coupler connection or
faulty A/C system.
D "G/R" wire open or
short
D Poor performance of
ECT sensor or TP
sensor
D Poor A8 connection.
If none of the above
exists, substitute a
known-good ECM
(PCM) and recheck.
1. ECM (PCM) coupler connected
2. Body ground