ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE) 6-2-81
DTC P0121 Throttle Position Sensor Circuit Range/Performance
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1. TP sensor 3. To other sensors
2. To MAP sensor 4. ECM
E23 E22 E21
12345671234561234567
7
891011121314151617 8910111213141516 891011121314151617
1819
1819
1718192021222324252627 20212223 202122232425 24252627 2627
2829303132 32 282930 28293031 3133 33 323334 3435 3435
WHT/GRN WHT/GRN
GRY
E22-28
E22-34
E22-8
4
2
1
3
BRN/WHT BRN/WHT
DTC Detecting Condition Trouble Area
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) is larger
than specified value.
(2 driving cycle detection logic)
• Air intake system
• TP sensor
• TP sensor circuit
• ECM
• MAF sensor
• Idle air control valve
WARNING:
• When performing a road test, select a place where there is no traffic or possibility of a traffic acci-
dent and very careful during testing to avoid occurrence of an accident.
• Road test should be carried out with 2 persons, a driver and a tester, on a level road.
NOTE:
Check to make sure that the following conditions are satisfied when using this DTC CONFIRMATION
PROCEDURE.
• Intake air temp.: –7°C, 19.4°F or higher
• Engine coolant temp.: 70°C, 158°F or higher
• Altitude (barometric pressure): 2500 m, 8200 ft or less (540 mmHg, 72 kPa or more)
To Next Page
Loading...
