Suzuki Wagon R Plus RB310, Service Manual

Page: 265 / 846

6-2-90 ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE)
6 Check wire circuit.
1) Measure resistance between “E22-34” wire
terminal of ECM connector and “GRY” wire
terminal of TP sensor connector with igni-
tion switch turned OFF.
Is resistance below 5
Ω
?
Go to Step 8. “GRY” wire open circuit or
high resistance circuit.
7 Check ground circuit.
1) Connect connector to ECM.
2) Check for proper connection of MAP sensor
at “BRN/WHT” wire terminal.
3) Measure resistance between “BRN/WHT”
wire terminal of MAP 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” wire
terminal 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 TP sensor.
1) Check resistance between terminals of TP
sensor. See Fig. 2.
TP sensor resistance
Between 1 and 3: 4.0 – 6.0 k
Ω
Between 1 and 2: 0.1 – 6.5 k
Ω
Are measured values within specifications?
Substitute a known-good
ECM and recheck. Replace TP sensor.
Step Action Yes No
[A]: Fig. 1 for Step 3
[B]: Fig. 2 for Step 9