Isuzu N 2008 Series Workshop Manual page 260

Step
1. Turn OFF the ignition.
2. Disconnect
harness connector.
3. Inspect for
connections and corrosion at the harness
connector of the boost pressure sensor (pins
1, 2 and 3 of E24).
5
4. Disconnect the ECM harness connector.
5. Inspect for
connections and corrosion at the harness
connector of the ECM (pins 91, 95 and 109 of
E12).
6. Repair the connection(s) as necessary.
Did you find and correct the condition?
1. Test each sensor circuit between the ECM
(pins 91, 95 and 109 of E12) and the boost
pressure sensor (pins 1, 2 and 3 of E24) for
6 high resistance.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
1. Turn OFF the ignition.
2. Disconnect
connector.
3. Inspect for
connections and corrosion at the harness
connector of the BARO sensor (pins 1, 2 and
3 of B121).
7
4. Disconnect the ECM harness connector.
5. Inspect for
connections and corrosion at the harness
connector of the ECM (pins 60, 61 and 71 of
J14).
6. Repair the connection(s) as necessary.
Did you find and correct the condition?
1. Test each sensor circuits between the ECM
(pins 60, 61 and 71 of J14) and the BARO
sensor (pins 1, 2 and 3 of B121) for high
8 resistance.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
Replace the boost pressure sensor. Refer to Boost
Pressure Sensor in Section 1J Induction.
9
Did you complete the replacement?
Replace the BARO sensor. Refer to BARO Sensor
Replacement.
10
Did you complete the replacement?
Action
the boost pressure
an intermittent, for
an intermittent, for
the BARO sensor harness
an intermittent, for
an intermittent, for
Engine Control System (4JJ1)
Value(s)
sensor
poor
—
poor
—
poor
—
poor
—
—
—
Yes
Go to Step 11 Go to Step 6
Go to Step 11 Go to Step 9
Go to Step 11 Go to Step 8
Go to Step 11 Go to Step 10
Go to Step 11
Go to Step 11
1A-257
No
—
—