ENGINE GENERAL INFORMATION AND DIAGNOSIS
6-49
GA413
supple
DTC P0121 THROTTLE POSITION CIRCUIT RANGE/PERFORMANCE
PROBLEM
WIRING DIAGRAM – Refer to DTC P0120 section.
CIRCUIT DESCRIPTION
DTC DETECTING CONDITION
POSSIBLE CAUSE
D
After engine warmed up.
D
Difference between actual throttle opening (detected from TP sensor)
and opening calculated by ECM (Obtained on the basis of engine
speed and intake manifold pressure) in larger than specified value.
:
2 driving cycle detection logic, continuous monitoring
D
TP sensor malfunction
D
High resistance in the circuit
D
ECM malfunction
DTC CONFIRMATION PROCEDURE
WARNING:
D
When performing a road test, select a place where there is no traffic or possibility of a traffic acci-
dent and be very careful during testing to avoid occurrence of an accident.
D
Road test should be carried out with 2 persons, a driver and a tester, on a level road.
1) Turn ignition switch OFF. Clear DTC with ignition switch ON, check vehicle and environmental condition for:
– Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)
– Ambient temp.: – 10
_
C, 14
_
F or higher
– Intake air temp.: 70
_
C, 158
_
F or lower
– Engine coolant temp.: 70
5
C, 158
5
F or higher
2) Warm up engine to normal operating temperature.
3) Increase vehicle speed to 30 – 40 mph, 50 – 60 km / h in 3rd gear and hold throttle valve at that opening position
for 1 min.
4) Stop vehicle.
5) Check DTC in “DTC” mode and pending DTC in “PENDING DTC” mode.
INSPECTION
STEP
ACTION
YES
NO
1
Was “ENGINE DIAG. FLOW TABLE” performed?
Go to Step 2.
Go to “ENGINE
DIAG. FLOW
TABLE”.
2
Check TP Sensor and Its Circuit.
1) Turn ignition switch OFF and connect SUZUKI scan tool to
DLC.
2) Turn ignition switch ON and check TP sensor output voltage
when throttle valve is at idle position and fully opened.
See Fig. 1.
If OK, substitute a
known-good ECM
and recheck.
Go to Step 3.
3
Check TP Sensor.
1) Turn ignition switch OFF.
2) Disconnect TP sensor connector.
3) Check for proper connection to TP sensor at each terminal.
4) If OK, then measure resistance between terminals and
check if each measured value is as specified below.
See Fig. 2.
Between 1 and 2: 2.5 – 6.0 k
W
Between 1 and 3: 0.02
W
– 6.0 k
W
, varying according to
throttle valve opening.
Are measured values as specified?
High resistance in
“LT GRN/RED”,
“GRY/YEL” or
“BLU/YEL” circuit.
If wire and
connection are
OK, substitute a
known-good ECM
and recheck.
Replace TP
sensor.
Summary of Contents for GA413
Page 1: ...99500 76A01 01E 99500 76A01 01E SERVICE MANUAL SERVISE MANUAL...
Page 40: ......
Page 43: ......
Page 267: ...SYSTEM CIRCUIT ANTILOCK BRAKE SYSTEM ABS OPTIONAL 5E 13...
Page 414: ...6E 4 ENGINE AND EMISSION CONTROL SYSTEM...
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Page 441: ...ENGINE AND EMISSION CONTROL SYSTEM 6E 31 Fig for Step 2 Fig for Step 3...
Page 443: ...ENGINE AND EMISSION CONTROL SYSTEM 6E 33 Fig for Step 2 Fig for Step 3...
Page 446: ...6E 36 ENGINE AND EMISSION CONTROL SYSTEM Fig for Step 2...
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Page 600: ...BLANK DIFFERENTIAL 7F 17...
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Page 672: ...9 36 BODY SERVICE...
Page 674: ...9 38 BODY SERVICE...
Page 675: ...BODY SERVICE 9 39 RUST PROOF TREATMENT AREA...
Page 676: ...9 40 BODY SERVICE...
Page 753: ......
Page 895: ...ENGINE AND EMISSION CONTROL SYSTEM 6E 3 GA413 supple...
Page 896: ...6E 4 ENGINE AND EMISSION CONTROL SYSTEM GA413 supple...
Page 902: ...6E 10 ENGINE AND EMISSION CONTROL SYSTEM GA413 supple...
Page 991: ...9 4 BODY SERVICE GA413 supple...
Page 993: ...9 6 BODY SERVICE GA413 supple...
Page 994: ...BODY SERVICE 9 7 GA413 supple RUST PROOF TREATMENT AREA...
Page 995: ...9 8 BODY SERVICE GA413 supple...
Page 998: ...BODY SERVICE 9 11 GA413 supple UNDERBODY DIMENSIONS For van model...
Page 1000: ...BODY SERVICE 9 13 GA413 supple For truck model...
Page 1130: ...7E 20 DIFFERENTIAL FRONT 09944 66020 Bearing installer 09951 16060 Lower arm bush remover...
Page 1143: ...ndice MEMO Notizen Note Notas...
Page 1159: ...8A 1 12 MEMO Notizen Note Notas...
Page 1179: ...8A 3 20 Memo Notizen Note Notas...
Page 1181: ...8A 4 2 Memo Notizen Note Notas...
Page 1192: ...8A 6 5 Memo Notizen Note Notas...
Page 1198: ...8A 6 11 Memo Notizen Note Notas...
Page 1208: ...8A 6 21 Memo Notizen Note Notas...
Page 1216: ...8A 6 29 Memo Notizen Note Notas...
Page 1226: ...8A 6 39 Memo Notizen Note Notas...
Page 1237: ...8A 6 50 Memo Notizen Note Notas...
Page 1246: ...Prepared by 1st Ed July 2002 Printed in Japan 114...