Isuzu 2008MY N Series Workshop Manual page 328

Step
1. Remove the glow relay.
2. Inspect for an intermittent and for poor
connection on each glow relay terminal.
13
3. Repair the connection(s) as necessary.
Did you find and correct the condition?
Replace the glow relay.
14
Did you complete the replacement?
Replace the appropriate glow plug.
15
Did you complete the replacement?
1. Reconnect
components,
connector(s).
2. Turn OFF the ignition for 30 seconds.
3. Turn ON the ignition, with the engine OFF.
4. Connect a test lamp between the metal bus
bar (glow plug power supply E-14 connector)
16
and a known good ground.
5. Perform the Glow Relay Control with a scan
tool.
6. Command the relay ON while observing the
test lamp.
Does the test lamp turn ON only when
commanded ON?
Action
all previously disconnected
relay, fuse or harness
Engine Control System (4HK1)
Value(s) Yes
—
Go to Step 16
—
Go to Step 16
—
Go to Step 16
—
Go to Step 4
1A-325
No
Go to Step 14
—
—
Go to Step 2