Suzuki WagonR+ RB310 Service Manual page 2469

6-110 ENGINE DIAGNOSIS
TABLE B-5 A/C SIGNAL CIRCUITS CHECK (VEHICLE WITH A/C)
"HEATER"
INSPECTION
STEP
1 1) Disconnect ECM connectors with ignition
switch at OFF position.
2) Check resistance between E23-14 terminal and
E23-10 terminal.
3) Is it within specification?
Reference value. See Fig. 1.
At 0_C 6.3 – 6.9 kΩ
At 25_C 1.8 – 2.2 kΩ
2 1) Check voltage at E22-16 terminal under each
condition given in table below.
Ignition switch ON
A/C switch OFF
Ignition switch ON
A/C switch ON
2) Is check result satisfactory?
Blower fan switch
Blower
fan motor
A / C switch
ACTION
10 – 14V
0 – 1V
Heater
fan relay
Dual
pressure
switch
Evaporator
thermistor
A / C compressor
YES
Go to Step 2.
Go to Step 3.
NO
Faulty A/C evaporator
thermistor or its
circuit.
D "Lg/R" wire open or
short
D Poor E22-16
terminal connection
If wire and connection
are OK, substitute a
known-good ECM and
recheck.
Go to Step 3.