Suzuki Grand Vitara XL-7 Service Manual page 127

DTC P0221 (P0220) THROTTLE POSITION RANGE/PERFORMANCE PROBREM 2
WIRING DIAGRAM
Refer to DTC P0121.
DTC CONFIRMATION PROCEDURE
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze flame data by using scan tool.
3) Run engine at idle speed for 10 sec. or more.
4) Check DTC and pending DTC by using scan tool.
TROUBLESHOOTING
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 Check Sensor Power Supply Circuit
1) Connect scan tool to DLC with ignition switch
OFF and then turn ignition switch ON.
2) Dose scan tool indicate DTC as shown below?
<Using Suzuki mode of Suzuki Scan tool>
P1614
<Using Generic Scan tool or Euro mode of Suzuki
Scan tool>
P0560
3 Check Wire Harness
1) Disconnect connector from TP sensor with
ignition switch OFF.
2) Check for proper connection to TP sensor at each
terminal.
3) If OK, then with ignition switch ON, check voltage
between "LT GRN" wire and "BRN" wire terminals
at connector of TP sensor.
Is voltage about 5 V?
4 Check TP Sensor Output Voltage
1) Remove ECM cover referring to "Voltage Check"
in this section.
2) With ignition switch ON, check voltage between
C51-68 and ground, when accelerator pedal is at
idle position to fully depressed position.
Is voltage 0.2 – 1.6 V?
ENGINE DIAGNOSIS (RHZ ENGINE WITH SINGLE-CONNECTOR ECM) 6-67
ACTION YES
Go to Step 2.
Go to DTC P1614
(P0560) Diag. Flow
Table.
Go to Step 4.
Substitute a known-
good ECM and
recheck.
NO
Go to "ENGINE DIAG.
FLOW TABLE".
Go to Step 3.
"LT GRN" wire open,
"BRN" wire open, poor
C51-44 connection, or
poor C51-22
connection.
If wire and connection
are OK, substitute a
known-good ECM and
recheck.
"GRY/BLU" wire
open, "GRY/BLU"
wire shorted to
ground/battery or
poor TP sensor
connector.
If wire and connection
are OK, substitute a
known-good TP
sensor and recheck.