Isuzu 1999 RODEO Workshop Manual page 930

formed or damaged
terminal–to–wire connection.
f The MAP sensor shares a 5 Volt Reference with the TP
sensor and Fuel Pressure sensor.
If these codes are also set, it could indicate a
problem with the 5 Volt reference circuit.
f The MAP sensor shares a ground with the TP sensor
and Fuel Pressure sensor.
f Inspect the wiring harness for damage; shorts to
ground, shorts to battery positive, and open circuits. If
DTC P1106 – MAP Sensor Circuit Intermittent High Voltage
Step
1 Was the "On–Board Diagnostic (OBD) System Check"
performed?
2 Is DTC P0108 also set?
3 Are Diagnostic Trouble Code P0463, and/or P1121
also set?
4 Check for a poor sensor ground circuit terminal
connection at the MAP sensor.
Was a problem found?
5 Check the MAP signal circuit between the MAP sensor
connector and the PCM for an intermittent short to
voltage.
Was a problem found?
6 Check for an intermittent short to voltage on the 5 volt
reference circuit between the PCM and the following
components:
f
Fuel Tank Vapor Pressure Sensor
f
TP sensor
Was a problem found?
7 Check for a poor sensor ground circuit terminal
connection at the PCM.
Was a problem found?
8 Check for an intermittent open or a faulty splice in the
sensor ground circuit.
Was a problem found? (if no, start with the diagnosis
chart for other sensors in the circuit and see if 5V
returns.)
9 Replace the faulty harness connector terminal for the
sensor ground circuit.
Is the action complete?
10 Locate and repair the intermittent open/short circuit in
the wiring harness as necessary.
Is the action complete?
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
terminals, and poor
Action
the harness appears to be OK, observe the MAP
display on the Tech 2 while moving connectors and
wiring harnesses related to the sensor. A change in the
display will indicate the location of the fault.
Reviewing the Failure Records vehicle mileage since the
diagnostic test last failed may help determine how often
the condition that caused the Diagnostic Trouble Code to
be set occurs. This may assist in diagnosing the
condition.
Value(s)
— Go to Step 2
Go to DTC
P0108 chart
—
— Go to Step 6
— Go to Step 9
Go to Step
—
Go to Step
—
— Go to Step 9
Go to Step
—
— Verify repair
— Verify repair
6E1–303
Yes No
Go to OBD
System
Check
first Go to Step 3
Go to Step 4
Go to Step 5
10 Go to Step 8
10 Go to Step 7
Go to Step 8
Refer to
Diagnostic
Aids
10
—
—