Isuzu 1999 RODEO Workshop Manual page 949

6E1–322 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
DTC P1133 – O2 Sensor Insufficient Switching (Bank 1 Sensor 1) (Cont'd)
Step
7 1. Ignition OFF.
2. Check for damage to PCM pins or terminals.
Was a problem found?
8 Check for a short to voltage or ground or an open in the
signal circuit.
Was a problem found?
9 1. Ignition OFF.
2. Disconnect the PCM connector.
3. With the HO2S disconnected, check for high and
low signal circuits shorted together between the
PCM and HO2S.
Was a problem found?
10 With the PCM connected and Bank 1 HO2S 1
disconnected from the harness, check Bank 1 HO2S 1
with a Tech 2.
Is the voltage in the specified range?
11 Replace the affected heated oxygen sensors.
NOTE: Before replacing the sensors, the cause of the
contamination must be determined and corrected.
f
Fuel contamination.
f
Use of improper RTV sealant.
f
Engine oil/coolant consumption.
Is the action complete?
12 Replace the PCM.
IMPORTANT: The
programmed. Refer to On–Vehicle Service in
Powertrain Control
procedures.
And also refer to latest Service Bulletin.
Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
Is the action complete?
Action
replacement PCM must
Module and Sensors
Value(s)
— Verify repair
— Verify repair
— Verify repair
Go to Step
430–470 mV
— Verify repair
be
for
— Verify repair
Yes No
Go to Step 8
Go to Step 9
Go to Step
10
Go to Step
11 12
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