Failure Indicator Lamp Flashing Pattern - Yanmar 3TNV82A Troubleshooting Manual

Method and Procedure of Failure Diagnosis

FAILURE INDICATOR LAMP FLASHING PATTERN

This section provides examples that demonstrate how the failure indicator flashes in a pattern specific to
the DTC that occurs.
If an accelerator sensor failure is detected at power-on time, the failure indicator flashes in a pattern of 5
(five equal flashes) as shown in the fist example; if an EGR valve failure is detected at power-on time, it
flashes in a pattern of 13 (i.e., one long flash followed by 3 short flashes) as shown in the second example.
When two or more failures occur at the same time, the failure indicator indicates all the failures one by one
in the ascending order of the number of flashes.
Also, the failure indicator is always lit for 2 [s] after power-on, whether or not any failure exists.
At power-on time
ON
OFF
At power-on time
ON
OFF
TNV DI Service Manual
Accelerator sensor failure
3s 0.5s
2s
Upper: 1 flash Lower: 3 flashes
3s
2s
Lower: 5 flashes
0.5s
EGR valve failure
0.5s 0.5s
FAILURE DIAGNOSIS
3s
Continuously ON
3s
Continuously ON
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