Isuzu 2008MY N Series Workshop Manual page 275

1A-272 Engine Control System (4HK1)
Step
1. Turn OFF the ignition.
2. Disconnect the in-line harness connector from
the cylinder head cover case.
3. Turn ON the ignition, with the engine OFF.
4. Connect a DMM between the cylinder #2 or #3
3
solenoid control circuit and a known good
ground.
Is the DMM voltage more than the specified
value?
Connect a test lamp between the charge voltage
circuit and a known good ground.
4
Does the test lamp illuminate?
Connect a test lamp between the charge voltage
circuit and battery voltage.
5
Does the test lamp illuminate?
1. Test the control circuits between the ECM and
the in-line harness connector for a short to
ground.
• Cylinder #2: Between pin 118 of E-12
and 6 of H-70
6
• Cylinder #3: Between pin 120 of E-12
and 7 of H-70
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
1. Test the charge voltage circuits between the
ECM and the in-line harness connector for a
short to battery or ignition voltage.
• Cylinder #2: Between pin 118 of E-12
and 6 of H-70
7
• Cylinder #3: Between pin 120 of E-12
and 7 of H-70
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
1. Test the charge voltage circuits between the
ECM and the in-line harness connector for a
short to ground.
• Cylinder #2: Between pin 116 of E-12
and 2 of H-70
8
• Cylinder #3: Between pin 116 of E-12
and 3 of H-70
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
Action Value(s) Yes
12.0 volts
Go to Step 4
-
Go to Step 7
-
Go to Step 8
-
Go to Step 15
-
Go to Step 15
-
Go to Step 15
No
Go to Step 6
Go to Step 5
Go to Step 9
Go to Step 14
Go to Step 14
Go to Step 14