Suzuki Wagon R Plus RB310 - Page 250

ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE) 6-2-75
7 Check ground circuit.
1) Connect connectors to ECM.
2) Check for proper connection of IAT sensor
connector at “BRN/WHT” wire terminal.
3) Measure resistance between “BRN/WHT”
wire terminal of IAT sensor connector and
body ground.
Is resistance below 5
Ω
?
Go to Step 9. Go to Step 8.
8 Check ground circuit.
1) Measure resistance between “E22-28” ter-
minal of ECM connector and body ground.
Is resistance below 5
Ω
?
“BRN/WHT” wire open cir-
cuit or high resistance cir-
cuit.
Poor “E22-28” connection.
Faulty ECM ground cir-
cuit.
If circuit are OK, substi-
tute a known-good ECM
and recheck.
9 Check IAT sensor according to “Mass Air Flow
(MAF) and Intake Air Temperature (IAT) Sensor
Inspection” in Section 6E2.
Is it in good condition?
Substitute a known-good
ECM and recheck.
Replace MAF and IAT
sensor.
Step Action Yes No
[A]: Fig. 1 for Step 3
1. Disconnected MAF and IAT sensor connector
2. Engine ground
2
1
[A]