Suzuki 2000 Grand Vitara SQ625 Service Manual page 62

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
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)
DTC CONFIRMATION PROCEDURE
Refer to previous page (DTC P0130).
TROUBLESHOOTING
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 1) Replace HO2S-1 and recheck.
Is DTC P0133 detected?
ACTION
TROUBLE AREA
D HO2S-1
D ECM (PCM)
YES
Go to Step 2.
Substitute a known-
good ECM (PCM)
and recheck.
NO
Go to "ENGINE
DIAG. FLOW
TABLE".
HO2S-1 malfunction.