Suzuki WagonR+ RB310 Service Manual page 2470

STEP
3 1) Check voltage at E22-1 terminal under each
condition given in table below.
While engine running,
A/C switch OFF
While engine running,
A/C switch ON
NOTE:
When A/C evaporator thermistor temp. is
below 2.5_C (36.5_F), A/C remain OFF (E22-1
terminal voltage become 0 – 1 V). This
condition is not abnormal.
2) Is check result satisfactory?
Fig. for Step 1
ACTION
0 V
10 – 14V
Temperature
YES
A/C control system
circuits are in good
condition.
ENGINE DIAGNOSIS 6-111
NO
D "B/Y" wire open or
short
D Poor E22-1 terminal
connection
If wire and connection
are OK, substitute a
known-good ECM and
recheck.