Isuzu 1999 RODEO Workshop Manual page 791

6E1–164 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
DTC P0138 – O2 Sensor Circuit High Voltage (Bank 1 Sensor 2) (Cont'd)
Step
4 1. Ignition OFF.
2. Disconnect Bank 1 HO2S 2.
3. Ignition ON.
4. At HO2S 2 connector (PCM side) use a DVM to
measure voltages at the high and low signal
terminals.
Are the voltages in the specified range?
5 Repair short to voltage in signal circuit.
6 1. Ignition OFF.
2. Disconnect the PCM connector.
3. Check for damage to the PCM pins and terminals.
Was a problem found?
7 1. Ignition ON, engine OFF.
2. Disconnect Bank 1 HO2S 2 and jumper the HO2S
high and low circuits (PCM side) to ground.
3. Using a Tech 2, monitor Bank 1 HO2S 1 voltage.
Is Bank 1 HO2S 2 voltage below the specified value?
8 Replace Bank 1 HO2S 2.
Is the action complete?
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?
Action
replacement PCM must
Module and Sensors
Value(s)
5–14 V Go to Step 5
— Verify repair
— Verify repair
10 mV Go to Step 8
— Verify repair
be
for
— Verify repair
Yes No
Go to Step 6
—
Go to Step 7
Go to Step 9
—
—