Suzuki 2000 Grand Vitara SQ416, Service Manual

Page: 62 / 729

YH4
GRAND
VITARA
6-58 ENGINE DIAGNOSIS (G16 / J20 ENGINES)
DTC P0133 HO2S-1 CIRCUIT SLOW RESPONSE
WIRING DIAGRAM
Refer to page (DTC P0130).
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION TROUBLE AREA
Following conditions are detected in idle state
while running under driving conditions described
for DTC CONFIRMATION PROCEDURE.
Hi / Lo cycle (TRANS TIME displayed on scan tool)
of HO2S-1 output voltage is longer than
specification or response rates of Hi
Lo and
Lo Hi (TRANS TIME displayed as R L threshold
V or L R threshold V on scan tool) are longer than
specification.
(2 driving cycles detection logic)
HO2S-1
ECM (PCM)
DTC CONFIRMATION PROCEDURE
Refer to previous page (DTC P0130).
TROUBLESHOOTING
STEP ACTION YES NO
1 Was “ENGINE DIAG. FLOW TABLE” performed? Go to Step 2. Go to “ENGINE
DIAG. FLOW
TABLE”.
2 1) Replace HO2S-1 and recheck.
Is DTC P0133 detected? Substitute a known-
good ECM (PCM)
and recheck. HO2S-1 malfunction.