Suzuki Liana RH413, Service Manual

Page: 183 / 1302

Engine General Information and Diagnosis: 1A-132
8 Check A/C compressor signal
1) Check voltage at “G04-1” terminal under each condition
given as follows.
Voltage at “G04-1” terminal
While engine running, A/C switch OFF: 10 – 14 V
While engine running, A/C switch ON: 0 V
NOTE
When A/C evaporator thermistor temp. is below
2.5
°
C (36.5
°
F), A/C remains OFF (“G04-1”
terminal voltage becomes 10 – 14 V). This
condition is not abnormal.
Is check result satisfactory?
Go to Step 9. “BRN/YEL” wire open or
short. Poor “G04-1”
terminal connection.
If wire and connection
are OK, substitute a
known-good ECM and
recheck. Then go to
Step 9.
9 Check A/C compressor control relay
1) Turn ignition switch OFF and remove A/C compressor
control relay (1).
2) Check for proper connection to relay at terminals “c” and
“d”.
3) If OK, check that there is continuity between “c” and “d”
when battery is connected to terminals “a” and “b”.
Is check result satisfactory?
Go to Step 10. Replace A/C
compressor control
relay.
10 Check A/C compressor circuit
1) Disconnect connector from A/C compressor with ignition
switch at OFF position.
2) Check voltage at A/C compressor harness under each
condition given as follows.
Voltage at A/C compressor harness
While engine running, A/C switch OFF: 0 V
While engine running, A/C switch ON: 10 – 14 V
Is check result satisfactory?
Check A/C compressor
referring to
“Compressor Inspection
in Section 7B” and
“Compressor Inspection
in Section 7B”. “WHT” wire open or
short.
Step Action Yes No
“d”
“b”
“a”
“c”
1
d
b
a
c
1
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