Suzuki WagonR+ RB310 Service Manual page 2397

6-38 ENGINE DIAGNOSIS
2
1. ECM coupler disconnected
2. Ohmmeter
TERMINALS
E21-7 to E23-6
E22-4 to E23-6
E21-9 to E22-5/6
E21-21 to E22-5/6
E21-31 to E22-5/6
E21-8 to E22-5/6
E22-2 to E22-5/6
E22-9 to E22-5/6
E22-8 to E22-5/6
E22-17 to E22-5/6
E21-4 to E22-5/6
E22-19 to E23-6
E22-1 to Body ground
E22-18 to E22-5/6
E22-10 to E22-7
E21-1 to Body ground
E21-2 to Body ground
E21-3 to Body ground
Resistance Check
1) Disconnect ECM couplers from ECM with ignition switch OFF.
CAUTION:
Never touch terminals of ECM itself or connect voltmeter
or ohmmeter.
2) Check resistance between each terminal of couplers discon-
nected.
CAUTION:
D Be sure to connect ohmmeter probe from wire harness
side of coupler.
1
D Be sure to turn OFF ignition switch for this check.
D Resistance in table below represents that when parts
temperature is 20_C (68_F).
CIRCUIT
HO2S-1 heater
HO2S-2 heater
No.1 injector
No.2 injector
No.3 injector
No.4 injector
EGR valve (stepper motor coil 4)
EGR valve (stepper motor coil 3)
EGR valve (stepper motor coil 2)
EGR valve (stepper motor coil 1)
EVAP canister purge valve
Fuel pump relay
A/C compressor clutch
Radiator fan control relay
Main relay
Ground
Ground
Ground
STANDARD RESISTANCE
11.7 – 15.6 Ω
11.7 – 15.6 Ω
12.0 – 13.0 Ω
12.0 – 13.0 Ω
12.0 – 13.0 Ω
12.0 – 13.0 Ω
20 – 24 Ω
20 – 24 Ω
20 – 24 Ω
20 – 24 Ω
30 – 34 Ω
70 – 110 Ω
3 – 4.5 Ω
70 – 110 Ω
70 – 110 Ω
Continuity
Continuity
Continuity