DTC P0122: Throttle Position Sensor Circuit Low - Suzuki Jimny Workshop Manual
1A
DTC P0122: Throttle Position Sensor Circuit Low
Wiring Diagram
| 1. | TP sensor | 2. | To MAP sensor | 3. | To other sensors | 4. | ECM |
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
Voltage of TP sensor output is less than the specified value for 0.5 seconds continuously.
(1 driving cycle detection logic) |
•
TP sensor circuit
• TP sensor • MAP sensor • ECM |
DTC Confirmation Procedure
1)
With ignition switch turned OFF, connect scan tool.
2)
Turn ON ignition switch and clear DTC using scan tool.
3)
Start engine and run it for 10 sec. or more.
4)
Check DTC and pending DTC.
DTC Troubleshooting
| Step | Action | YES | NO |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
TP sensor and its circuit check
1)
Connect scan tool to DLC with ignition switch turned OFF and then turn ON ignition switch.
2)
Check throttle valve opening percentage displayed on scan tool.
3)
Check throttle valve opening percentage displayed on scan tool while opening throttle valve from idle position to full open position.
Is it displayed 0%?
|
Go to Step 3.
|
Intermittent trouble. Check for intermittent referring to
Intermittent and Poor Connection Inspection
.
|
| 3 |
Wire harness check
1)
Disconnect connector from TP sensor with ignition switch turned OFF.
2)
Check for proper connection to TP sensor at “LT GRN/RED”, “LT GRN” and “BLK/BLU” wire terminals.
3)
If OK, then with ignition switch turned ON, check for the following terminal voltages.
•
Between “LT GRN/RED” wire terminal of TP sensor connector and body ground
• Between “LT GRN” wire terminal of TP sensor connector and body ground
Is each terminal voltage about 4 – 6 V?
|
Go to Step 6.
|
Go to Step 4.
|
| 4 |
Wire harness check
1)
Turn ignition switch to OFF position.
2)
Disconnect connector from MAP sensor.
3)
Turn ignition switch to ON position.
4)
Measure voltage between “LT GRN/RED” wire terminal of TP sensor connector and body ground.
Is terminal voltage about 4 – 6 V?
|
Faulty MAP sensor, check MAP sensor according to
Manifold Absolute Pressure (MAP) Sensor Inspection:M13A
.
|
Go to Step 5.
|
| 5 |
ECM voltage check
1)
Turn ignition switch to OFF position.
2)
Check for proper connection of ECM connector at “E119-8” terminal.
3)
Turn ignition switch to ON position.
4)
Measure voltage between “E119-8” terminal of ECM connector and body ground.
Is terminal voltage about 4 – 6 V?
|
“LT GRN/RED” wire in open or high resistance circuit.
|
Go to Step 6.
|
| 6 |
Wire circuit check
1)
Disconnect connectors from ECM with ignition switch turn OFF.
2)
Measure resistance between “LT GRN/RED” wire terminal of TP sensor connector and body ground, between “LT GRN” wire terminal of TP sensor connector and body ground and between “LT GRN” and “BLK/BLU” wire terminals of TP sensor connector.
Is resistance infinity?
|
Go to Step 7.
|
“LT GRN/RED” and/or “LT GRN” wire shorted to ground circuit and/or “LT GRN” wire shorted to “BLK/BLU” wire.
If wires are OK, substitute a known-good ECM and recheck.
|
| 7 |
TP sensor check
1)
Measure resistance between terminals of TP sensor referring to
Throttle Position (TP) Sensor On-Vehicle Inspection:M13A
.
Are measured values within specifications?
|
Substitute a known-good ECM and recheck.
|
Replace TP sensor.
|
NOTE:
Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and confirm that the trouble has been corrected.