Isuzu 2008MY N Series Workshop Manual page 279

1A-276 Engine Control System (4HK1)
Step
1. Turn OFF the ignition.
2. Disconnect
harness connector.
3. Inspect
connections and corrosion at the harness
connector of the boost pressure sensor (pins
1, 2 and 3 of E-24).
5
4. Disconnect the ECM harness connector.
5. Inspect
connections and corrosion at the harness
connector of the ECM (pins 91,95 and 109 of
E-12).
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 E-12) and the boost
pressure sensor (pins 1, 2 and 3 of E-24) 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
connections and corrosion at the harness
connector of the BARO sensor (pins 1, 2 and
3 of B-121).
7
4. Disconnect the ECM harness connector.
5. Inspect
connections and corrosion at the harness
connector of the ECM (pins 60, 61 and 71 of
J-14).
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 J-14) and the BARO
sensor (pins 1, 2 and 3 of B-121) for high
resistance.
8
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
for an intermittent,
for an intermittent,
the BARO sensor
for an intermittent,
for an intermittent,
Value(s)
sensor
for poor
—
for poor
—
harness
for poor
—
for 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
No
—
—