Suzuki GRAND VITARA Owner's Manual page 264

1A-209 Engine General Information and Diagnosis:
DTC Troubleshooting
NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
"Precautions For DTC Troubleshooting: ".
Step
1 Was "Engine and Emission Control System Check"
performed?
2 Accelerator pedal position sensor and its circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch.
3) Check each voltage of "APP Sensor 1 Volt" and "APP
Sensor 2 Volt" displayed on scan tool when accelerator
pedal is idle position and fully depressed.
Is displayed each APP sensor value as described voltage in
"Scan Tool Data: "?
3 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 "BLU/YEL", "BLU/
GRN", "ORN/BLU", "ORN", "WHT/BLU" and "WHT" wire
terminals.
"ORN BLU"
3) If OK, measure voltage between "WHT" wire terminal of
accelerator pedal position (APP) sensor assembly
connector and vehicle body ground, between "ORN/
BLU" wire terminal of accelerator pedal position (APP)
sensor assembly connector and vehicle body ground
with ignition switch turned ON.
Is each voltage 4 – 6 V?
4 Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at "E23-
56" and "E23-53" terminals.
3) If OK, measure resistance between "E23-56" terminal of
ECM connector and engine ground, between "E23-53"
terminal of ECM connector and engine ground.
Is each resistance infinity?
Action
"ORN"
"WHT/BLU"
"BLU/YEL"
"WHT"
"BLU/GRN"
Yes
Go to Step 2.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection: in Section
00"
Go to Step 6.
I5JB0A110071-01
Go to Step 5.
No
Go to "Engine and
Emission Control
System Check: ".
Go to Step 3.
Go to Step 4.
"WHT" wire or "ORN/
BLU" wire is shorted to
other circuit.