BASIC SERVICE PROCEDURE
EC-1211
[VG33ER]
C
D
E
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G
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K
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M
A
EC
10.
CHECK HEATED OXYGEN SENSOR 1 (BANK 2) SIGNAL
With CONSULT-II
1.
Stop engine.
2.
Replace heated oxygen sensor 1 (bank 2).
3.
Start engine and warm it up to normal operating temperature.
4.
Run engine at approx. 2,000 rpm for approx. 2 minutes under no load.
5.
See “HO2S1 MNTR (B2)” in “DATA MONITOR” mode.
6.
Running engine at 2,000 rpm under no load (engine is warmed
up to normal operating temperature.), check that the monitor
fluctuates between “LEAN” and “RICH” more than 5 times dur-
ing 10 seconds.
1 time: RICH
→ LEAN → RICH
2 times: RICH
→ LEAN → RICH → LEAN → RICH
Without CONSULT-II
1.
Stop engine.
2.
Replace heated oxygen sensor 1 (bank 2).
3.
Start engine and warm it up to normal operating temperature.
4.
Run engine at approx. 2,000 rpm for approx. 2 minutes under no
load.
5.
Set voltmeter probe between ECM terminal 51 and ground.
6.
Make sure that the voltage fluctuates between 0 - 0.3V and 0.6 -
1.0V more than 5 times during 10 seconds at 2,000 rpm.
1 time: 0 - 0.3V
→ 0.6 - 1.0V → 0 - 0.3V
2 times: 0 - 0.3V
→ 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V → 0 -
0.3V
OK or NG
OK (With CONSULT-II)>>GO TO 12.
OK (Without CONSULT-II)>>GO TO 13.
NG
>> GO TO 11.
11.
DETECT MALFUNCTIONING PART
Check the following.
1.
Check fuel pressure regulator. Refer to
EC-1219
.
2.
Check mass air flow sensor and its circuit. Refer to
EC-1327
.
3.
Check injector and its circuit. Refer to
EC-1716
.
Clean or replace if necessary.
4.
Check engine coolant temperature sensor and its circuit. Refer to
EC-1345
.
5.
Check ECM function by substituting another known-good ECM.
(ECM may be the cause of an incident, but this is a rare case.)
>> GO TO 2.
PBIB0120E
PBIB2157E