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3 CHECK HO2S2 HEATER (REAR) OUTPUT CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal and HO2S2 (rear) terminal as follows.
Refer to Wiring Diagram.
SEF830Z
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK 䊳 GO TO 5.
NG 䊳 GO TO 4.
4 DETECT MALFUNCTIONING PART
Check the following.
쐌 Joint connector-3
쐌 Harness for open or short between heated oxygen sensor 2 (rear) and engine ground.
䊳 Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0141, P0161 HEATED OXYGEN SENSOR 2 HEATER
(REAR) (BANK 1)/(BANK 2)
VG33E
Diagnostic Procedure (Cont’d)
EC-881
GI
MA
EM
LC
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
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