Suzuki Grand Vitara 2011 Manual page 280

1A-211 Engine General Information and Diagnosis: For Petrol Engine Model
Step
4 ECM voltage check
1) Disconnect connector from accelerator pedal position
(APP) sensor assembly with ignition switch turned OFF.
2) Check for proper connection to accelerator pedal
position (APP) sensor assembly at "ORN/BLU", "BLU/
GRN" and "BLU/YEL" wire terminals.
"ORN BLU"
3) If OK, measure voltage between "ORN/BLU" wire
terminal of accelerator pedal position (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 "E23-
53" terminal.
3) If OK, measure voltage between "E23-53" 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 "E23-
56", "E23-53" and "E23-52" terminals.
3) If OK, measure resistance between "BLU/GRN" wire
terminal and each "WHT", "ORN/BLU" wire terminals of
accelerator pedal position (APP) sensor assembly
connector.
Is each resistance infinity?
7 Wire harness check
1) Turn ON ignition switch.
2) Measure voltage between "E23-52" 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 "BLU/YEL" wire terminal of
accelerator pedal position (APP) sensor assembly
connector and vehicle body ground.
Is resistance below 3
Action
"ORN"
"WHT/BLU"
"BLU/YEL"
"WHT"
"BLU/GRN"
Ω
?
Yes
Go to Step 6.
I5JB0A110071-01
Substitute a known-
good ECM and recheck.
Go to Step 7.
Go to Step 8.
Go to Step 10.
No
Go to Step 5.
"ORN/BLU" wire is
shorted to power circuit.
"BLU/GRN" wire is
shorted to "WHT" wire
and/or "ORN/BLU" wire.
"BLU/GRN" wire is
shorted to power circuit.
Go to Step 9.