Isuzu 1999 RODEO Workshop Manual page 788

DTC P0137 – O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2) (Cont'd)
Step
6 1. Ignition OFF.
2. Leave the PCM and HO2S 2 disconnected.
3. Check for continuity between the high and low
signal circuits.
Was there continuity between the high and low circuits?
7 Repair the short between the high and low circuits.
Is the action complete?
8 1. Ignition OFF.
2. Reconnect the PCM, leave HO2S 2 disconnected.
3. Ignition ON.
Does the Tech 2 indicate Bank 1 HO2S 2 voltage near
the specified value?
9 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?
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
Action
replacement PCM must
Module and Sensors
Value(s)
— Go to Step 7
— Verify repair
Refer to
Diagnostic
430–450 mV
be
for
— Verify repair
6E1–161
Yes No
Go to Step 8
—
Aids
Go to Step 9
—