FAILURE DIAGNOSIS
TNV DI Service Manual
1-55
DTCs (Diagnostic Trouble Codes) General Description
(3) P1644/2: Intermittent Failure with SENSOR 5V
DTC Detecting Conditions
Movement at Error occurrence
Estimation of Failure cause/Error condition
• Wiring defect of the harness
•
The SENSOR 5V wire may be short-circuited with power supply or GND.
•
Sensor GND wire may be disconnected.
• The E-ECU internal circuitry may be faulty.
Diagnosis Description
DTC
P1644/2
Intermittent Failure with SENSOR 5V
1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator
Check points
1. Engine running.
2. Unconfirmed error detected 10 times.
3: Does not flash.
Harness
E-ECU
Error Mode
[Operation Continuation]: After detecting the error, the system lets the engine
continue to run without any restrictions.
Run restricted?
No.
Recovery
Conditions
No.
Remarks
1) Initial diagnosis
with the diagnosis
tool
• Check the fault indication.
• Check the voltage of the Sensor 5V .
*For details of the method and the procedure of diagnosis, see P.1-160
2) Check of
connectors/wiring
• Before beginning your work, be sure to turn off the key switch.
• Check that the Sensor 5V line and sensor GND line are not disconnected or the
insulation of the wiring is not peeled.
3) Failure Diagnostic
Work
• Check the harness for correct continuity.
• Check the output voltage of the E-ECU (voltage of the sensor 5V line).
*For details of the method and the procedure of diagnosis, see P.1-160
TNV_DI_SM_A4-Troubleshooting.book 55 ページ ２００７年１１月１５日 木曜日 午後５時２７分
