Isuzu N 2008 Series Workshop Manual page 242

Step
1. Disconnect the DMM.
2. Connect a test lamp between the ECM
harness connector (pin 9 of J14) to a known
6
good ground.
Does the test lamp illuminate?
1. Turn OFF the ignition.
2. Remove the IP cluster.
3. Connect a test lamp between the ignition
voltage feed circuit of the IP cluster harness
7
connector (pin 2 of B105) and a known good
ground.
4. Turn ON the ignition, with the engine OFF.
Does the test lamp illuminate?
Repair the open circuit or high resistance on the
ignition voltage feed circuit between the Meter
8
(10A) fuse and the IP cluster (pin 2 of B105).
Did you complete the repair?
1. Test the control circuit between the ECM (pin
9 of J14) and the IP cluster (pin 35 of B105)
for the following conditions:.
• An open circuit
9
• A short to gruond
• High resistance
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
1. Inspect for an intermittent and for poor
connections at the harness connector of the
IP cluster (pins 2 and 35 of B105).
10
2. Repair the connection(s) as necessary.
Did you find and correct the condition?
1. Test the control circuit between the ECM (pin
9 of J14) and the IP cluster (pin 35 of B105)
for a shrto to battery or ignition voltage.
11
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
1. Inspect for an intermittent and for a poor
connection at the harness connector of the
ECM (pin 9 of J14).
12
2. Repair the connection(s) as necessary.
Did you find and correct the condition?
Repair or replace the IP cluster. Refer to Instrument
Panel (IP) Cluster in Section 9E Instrumentation/
13
Driver Info.
Did you complete the repair or replacement?
Important: Replacement
programmed and learned.
14
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement?
Action
ECM must
Engine Control System (4JJ1)
Value(s)
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be
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Yes
Go to Step 11 Go to Step 12
Go to Step 9 Go to Step 8
Go to Step 15
Go to Step 15 Go to Step 10
Go to Step 15 Go to Step 13
Go to Step 15 Go to Step 13
Go to Step 15 Go to Step 14
Go to Step 15
Go to Step 15
1A-239
No
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