Suzuki SX4 Service Manual page 209

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Step
4
ECM voltage check
1) Disconnect connector from APP sensor assembly with
ignition switch turned OFF.
2) Check for proper connection to APP sensor assembly at
"RED", "YEL" and "WHT" wire terminals.
"RED"
3) If OK, measure voltage between "RED" wire terminal of
APP sensor assembly connector and vehicle body
ground with ignition switch turned ON.
Is voltage 4 – 6 V?
5
Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at "E01-
34" terminal.
3) If OK, measure voltage between "E01-34" terminal of
ECM connector and engine ground with ignition switch
turned ON.
Is voltage 0 V?
6
Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at "E01-
35", "E01-36" and "E01-34" terminals.
3) If OK, measure resistance between "YEL" wire terminal
and each "BRN", "RED" wire terminals of APP sensor
assembly connector.
Is each resistance infinity?
7
Wire harness check
1) Turn ON ignition switch.
2) Measure voltage between "E01-36" terminal of ECM
connector and engine ground.
Is voltage 0 V?
8
Ground circuit check
1) Connect connectors to ECM with ignition switch turned
OFF.
2) Measure resistance between "WHT" wire terminal of
APP sensor assembly connector and vehicle body
ground.
Is resistance below 5
Action
"BRN"
"YEL"
"BLU"
"WHT"
"GRN"
?
Engine General Information and Diagnosis:
Yes
Go to Step 6.
I4RS0B110048-01
Substitute a known-
good ECM and recheck.
Go to Step 7.
Go to Step 8.
Go to Step 10.
1A-159
No
Go to Step 5.
"RED" wire is shorted to
power circuit.
"YEL" wire is shorted to
"BRN" wire and/or
"RED" wire.
"YEL" wire is shorted to
power circuit.
Go to Step 9.

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