Suzuki Ignis Service Manual page 3288

Step
5 Check wire circuit.
1) Disconnect connectors from ECM with ignition
switch turned OFF.
2) Measure resistance between "GRY/RED" wire termi-
nal of ECM connector and body ground and between
"GRY/BLU" wire terminal of ECM connector and
body ground.
Is resistance infinity?
6 Check wire circuit.
1) Turn ON ignition switch.
2) Check voltage between "GRY/RED" wire terminal of
ECM connector and body ground and between
"GRY/BLU" wire terminal of ECM connector and
body ground.
Is voltage about 0 V at each terminal?
7 Check wire circuit.
1) Measure resistance between "C63-34" wire terminal
of ECM connector and "GRY/BLU" wire terminal of
TP sensor connector with ignition switch turned
OFF.
Is resistance below 5 Ω?
8 Check ground circuit.
1) Connect connectors to ECM.
2) Check for proper connection of MAP sensor connec-
tor at "ORN" wire terminal.
3) Measure resistance between "ORN" wire terminal of
MAP sensor connector and body ground.
Is resistance below 5 Ω?
9 Check ground circuit.
1) Measure resistance between "C63-28" wire terminal
of ECM connector and body ground.
Is resistance below 5 Ω?
10 Check TP sensor.
1) Turn OFF ignition switch.
2) Disconnect TP sensor connector.
3) Check for proper connection to TP sensor at each
terminal.
4) If OK, then measure resistance between TP sensor
terminals and check if each measured value is as
specified. See Fig. 2.
TP sensor resistance
Between 1 and 3: 4.0 – 6.0 kΩ
Between 1 and 2: 0.1 – 6.5 kΩ, varying according to
throttle valve opening.
Are measured values as specified?
Action
ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-87
Yes
Go to Step 6.
Go to Step 7.
Go to Step 8.
Go to Step 10.
"ORN" wire open circuit
or high resistance cir-
cuit.
Poor "C63-28" connec-
tion.
Go to Step 11.
No
"GRY/RED" and/or
"GRY/BLU" wire
shorted to ground
circuit.
If wire are OK, sub-
stitute a known-
good ECM and
recheck.
"GRY/RED" and/or
"GRY/BLU" wire
shorted to power
circuit.
If wire are OK, sub-
stitute a known-
good ECM and
recheck.
"GRY/BLU" wire in
high resistance cir-
cuit.
Go to Step 9.
Faulty ECM ground
circuit.
If circuit are OK,
substitute a known-
good ECM and
recheck.
Replace TP sensor.