FAILURE DIAGNOSIS
1-12
TNV DI Service Manual
DTCs (Diagnostic Trouble Codes) General Description
Accelerator sensor
(1) P0122/4: Accelerator Sensor Error (Low Voltage)
DTC Detecting Conditions
Movement at Error occurrence
Estimation of Failure cause/Error condition
• The connector may not be properly connected.
• Wiring defect of the harness
•
The accelerator sensor's signal wires may be disconnected or short-circuited with GND.
•
The SENSOR 5V wire may be disconnected or short-circuited with GND.
•
The SENSOR GND wire may be short-circuited with POWER SUPPLY (*NOTE).
*NOTE) If the SENSOR GND wire is short-circuited with POWER SUPPLY, the E-ECU's power supply line fuse
10A might be blown.With this fuse blown, the E-ECU may fail to detect/indicate the error, and to store
the error history.
• The accelerator sensor may be faulty.
•
Sensor output defect by a disconnection of the accelerator sensor inner wiring or a sliding resistance
increase
• The E-ECU internal circuitry may be faulty.
DTC
P0122/4
Accelerator Sensor Error (Low Voltage)
1 - Precondition; 2 - Detecting condition(s);
3 - Flashing pattern of failure indicator
Check points
1. Key switch ON.
2. Sensor voltage 0.2 [V] or lower.
3. Five flashes.
Harness
Accelerator sensor
Spare Accelerator Sensor Function
Unavailable
Available
Error Mode
[Run Under Restrictions]:
The engine runs at a constant rotational
speed.
[Stop Immediately]:
The engine continues to run using the
spare accelerator sensor instead.
Run restricted?
Yes: The target speed is set to the "on-
error target speed (standard value:
1500[min
-1
])" or “pre-error target
speed”.
No.
Recovery
Conditions
Yes: This error will be automatically reset
when a normal voltage (0.2 to
4.6[V]) is input.
Yes: This error will be automatically reset
when a normal voltage (0.2 to
4.6[V]) is input.
Remarks
TNV_DI_SM_A4-Troubleshooting.book 12 ページ ２００７年１１月１５日 木曜日 午後５時２７分
