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20 CHECK HEATED OXYGEN SENSOR 1 (BANK 1) SIGNAL
Without CONSULT-II
1. Stop engine and set ECM to Self-diagnostic mode II (Heated oxygen sensor 1 monitor). Refer to “HOW TO SWITCH
DIAGNOSTIC TEST MODE”, EC-94.
2. Start engine and run it at about 2,000 rpm for about 2 minutes under no-load.
3. Running engine at 2,000 rpm under no-load (The engine is warmed up to normal operating temperature.), check that
the MIL comes on more than 5 times during 10 seconds.
OK or NG
OK © GO TO 22.
NG (MIL does not come
on)
© GO TO 23.
NG (MIL comes on less
than 5 times)
© GO TO 30.
21 CHECK HEATED OXYGEN SENSOR 1 (BANK 2) SIGNAL
With CONSULT-II
1. See “HO2S1 MNTR (B2)” in “DATA MONITOR” mode.
2. Running engine at 2,000 rpm under no-load (The engine is warmed up to normal operating temperature.), check that
the monitor fluctuates between LEAN and RICH more than 5 times during 10 seconds.
PBIB0120E
1 time: RICH → LEAN → RICH
2 times: RICH → LEAN → RICH → LEAN → RICH
OK or NG
OK © INSPECTION END
NG (Monitor does not
fluctuate.)
© GO TO 24.
NG (Monitor fluctuates
less than 5 times.)
© GO TO 31.
22 CHECK HEATED OXYGEN SENSOR 1 (BANK 2) SIGNAL
Without CONSULT-II
1. Switch the monitored sensor from bank 1 to bank 2. Refer to “How to Switch Monitored Sensor from Bank 1 to Bank 2
or Vice Versa”, EC-94.
2. Running engine at 2,000 rpm under no-load (The engine is warmed up to normal operating temperature.), check that
the MIL comes on more than 5 times during 10 seconds.
OK or NG
OK © INSPECTION END
NG (MIL does not come
on)
© GO TO 24.
NG (MIL comes on less
than 5 times)
© GO TO 31.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
BASIC SERVICE PROCEDURE
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)
EC-67
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