Nissan Motor Co said Monday that it altered the results of exhaust emissions and fuel economy tests of new vehicles sold in Japan, in the latest misconduct to surface at the Japanese automaker.

Nissan acknowledged in September that it had been carrying out illegal post-production tests at its plants, allowing those who weren’t qualified to routinely conduct the tests.
Japan Today

HINTS
S Nissan Motor Co
V [said] Monday  
O that

S it  日産
V [altered] 変更した
O the results 結果
どんな→
[of] exhaust emissions 排気ガス量 and fuel economy tests 燃費テスト

どんな→
[of] new vehicles  
[sold]  販売された [in] Japan,
補 
[in] the latest misconduct  最新の不祥事で
[to] surface 表面化

補 
[at] the Japanese automaker. 

S Nissan
V [acknowledged] 認めた
補 [in] September
that

S it 日産
V [had been carrying out]  実施した
O illegal post-production tests  違法製品テスト
補 
[at] its plants,  

V [allowing]  認めた

those  かれら
who
V [weren’t qualified] 資格ない

OV [to routinely conduct] 日常で行っていた
O the tests. テスト