Isuzu 1999 RODEO Workshop Manual page 935

6E1–308 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
DTC P1111 – IAT Sensor Circuit Intermittent High Voltage
Step
1 Was the "On–Board Diagnostic (OBD) System Check"
performed?
2 Is DTC P0113 also set?
3 1. Check for a poor sensor ground circuit terminal
connection at the IAT sensor.
2. If a problem is found, repair as necessary.
Was a problem found?
4 1. Check for a poor IAT signal circuit terminal
connection at the IAT sensor.
2. If a problem is found, repair as necessary.
Was a problem found?
5 1. Check the IAT signal circuit between the IAT sensor
connector and the PCM for an intermittent open.
2. If a problem is found, repair as necessary.
Was a problem found?
6 1. Check the IAT signal circuit between the IAT sensor
connector and the PCM for an intermittent short to
voltage.
2. If a problem is found, repair as necessary.
Was a problem found?
7 1. Check for a poor sensor ground circuit terminal
connection at the PCM.
2. If a problem is found, repair as necessary.
Was a problem found?
8 1. Check for an intermittent open or a faulty splice in
the sensor ground circuit.
2. If a problem is found, repair as necessary.
Was a problem found?
Action Value(s) Yes
— Go to Step 2
Go to DTC
P0113 chart
— first
— Verify repair
— Verify repair
— Verify repair
— Verify repair
— Verify repair
— Verify repair
No
Go to OBD
System
Check
Go to Step 3
Go to Step 4
Go to Step 5
Go to Step 6
Go to Step 7
Go to Step 8
Refer to
Diagnostic
Aids