FAILURE DIAGNOSIS
1-162
TNV DI Service Manual
Method and Procedure of Failure Diagnosis
4. Check of the output voltage (fit with sensor):
• Connect the 2G eco-checker harness between E-ECU and machine’s harness (for details, see [How to
use the 2G eco-checker harness] (P.1-135). And connect the all connectors (sensors, E-ECU).
• Measure the voltage between sensor signal E38 and E28 using a circuit tester.
Voltage
Status
Action
E38
≤
4.5[V]
NG
• Replace the harness.
• Replace the accelerator sensor.
4.5[V] < E38 < 5.5[V]
OK
(Normal range)
Replace E-ECU.
5.5[V]
≤
E38
NG
• Replace the harness.
• Replace the accelerator sensor.
NG
• Check if the harness is damaged, or if the wiring is correct.
• Replace the harness.
OK
Replace E-ECU.
TNV_DI_SM_A4-Troubleshooting.book 162 ページ 2007年11月15日 木曜日 午後5時27分