Isuzu 1999 RODEO Workshop Manual page 814

DTC P0203 – Injector Circuit Malfunction – Cylinder 3 (Cont'd)
Step
7 1. Disconnect the PCM connector for the affected
injectors.
2. With a test light connected to B+, probe the affected
injector driver circuit.
Does the test light illuminate?
8 Repair short to ground in the injector driver circuit.
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?
10 1. Disconnect the injector test connector.
2. Ignition ON.
3. Use a test light connected to ground to probe each
terminal on the PCM side of the injector test
connector. Only the Ign+ terminal should illuminate
the test light.
Besides the Ign+, did any other terminal illuminate the
test light?
11 Repair the short to voltage in the injector driver circuit.
12 1. Disconnect the injector test connector.
2. Ignition ON.
3. Use a test light connected to ground to probe each
pin on the injector side of the connector.
Did any terminal illuminate the test light?
13 1. Disconnect the injector test connector.
2. Ignition OFF.
3. Clip one lead of an ohmmeter to the ignition pin on
the injector side of the test connector.
4. Touch the other lead to each of the other four pins in
the test connector, one pin at a time.
Instead of normal injector resistance, did the ohmmeter
indicate an open in one of the injector circuits?
14 Repair the open circuit or open injector.
15 Check for an open circuit between the injector test
connector and the PCM connector for the Injector 3
control circuit.
Was there an open circuit?
16 Repair the open circuit.
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
Action
replacement PCM must
Module and Sensors
Value(s)
— Go to Step 8
Go to OBD
—
be
for
Go to OBD
—
Go to Step
—
— Verify repair
Go to Step
—
Go to Step
—
— Verify repair
Go to Step
—
— Verify repair
6E1–187
Yes No
Go to Step 9
System
Check —
System
Check —
Go to Step
11 12
—
Go to Step
11 13
Go to Step
14 15
—
Go to Step 9
16
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