Suzuki Wagon R Manual page 2143

6-2-140 ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE)
Step
8 Check MAP sensor signal circuit.
1) Turn ON ignition switch.
2) Measure voltage between "LT GRN/RED"
wire terminal in MAP sensor harness con-
nector and engine ground.
Is voltage 4 – 5 V?
9 Check MAP sensor signal circuit.
1) Disconnect connectors from ECM with igni-
tion switch turned OFF.
2) Measure resistance between "E22-15" ter-
minal and vehicle body ground.
Is resistance infinity?
10 Check MAP sensor signal circuit.
1) Measure resistance between "LT GRN/
RED" wire terminal in MAP sensor harness
connector and "E22-15" terminal in ECM
connector.
Is resistance below 5
11 Check MAP sensor signal circuit.
1) Disconnect connectors from ECM with igni-
tion switch turned OFF.
2) Measure voltage between "LT GRN/RED"
wire terminal of MAP sensor connector and
engine ground with ignition switch turned
ON.
Is voltage 4 – 5 V?
12 Check MAP sensor output signal.
1) Check MAP sensor according to "Manifold
Absolute Pressure Sensor (MAP Sensor)
Inspection" in Section 6E2.
Is it in good condition?
Action
Ω
?
[A]: Fig. 1 for Step 3
Yes
Go to Step 11.
Go to Step 10.
Go to Step 12.
"LT GRN/RED" wire
shorted to other circuit
Substitute a known-good
ECM and recheck.
No
Go to Step 9.
"LT GRN/RED" wire
shorted to ground circuit.
"LT GRN/RED" wire in
open or high resistance
circuit.
Go to Step 12.
Faulty MAP sensor.