Suzuki WagonR+ RB310 Service Manual page 2471

6-112 ENGINE DIAGNOSIS
TABLE B-6 ELECTRIC LOAD SIGNAL CIRCUIT CHECK
Tail light relay
(Lighting switch)
Rear defogger
switch
Heater blower
switch
INSPECTION
STEP
1 Check Electric Load Signal Circuit.
When using SUZUKI scan tool:
1) Connect SUZUKI scan tool to DLC with ignition
switch OFF.
2) Start engine and select "DATA LIST" mode on
scan tool.
3) Check electric load signal under following each
condition. See Fig. 1.
Ignition switch ON, Small light,
heater blower fan and rear
defogger all turned OFF
Ignition switch ON, Small light,
heater blower fan or rear
defogger turned ON
Is check result satisfactory?
When not using SUZUKI scan tool:
1) Turn ignition switch ON.
2) Check voltage at each terminals E21-17 and E23-13
of ECM connector connected, under above each
condition. See Fig. 2.
Is each voltage as specified?
Fig. 1 for Step 1
When using SUZUKI scan tool:
Diodes in junction/
fuse block
E21-17
ACTION
: OFF
0 V (E21-17)
10 – 14 V (E23-13)
: ON
10 – 14 V (E21-17)
0 V (E23-13)
Fig. 2 for Step 1
When not using SUZUKI scan tool:
E21-17
E23-13
YES
Electric load signal "R /W" and/or
circuit is in good "P/Bl" circuit open
condition. or short, Electric
load diodes
malfunction or
Each electric load
circuit malfunction.
E23-13
NO