Isuzu N 2008 Series Workshop Manual page 297

1A-294 Engine Control System (4JJ1)
Step
Notice: If no Smoother transmission is installed,
skip to Step 5.
1. Turn OFF the ignition.
2. Reconnect the EHCU J22 harness connector
if disconnected.
4
3. Disconnect the TCM B112 harness connector.
4. Turn ON the ignition, with the engine OFF.
5. Monitor the DTC Information with a scan tool.
Is DTC P0101 set, but not DTC U0073?
1. Turn OFF the ignition.
2. Reconnect the EHCU J22 harness connector
if disconnected.
3. Reconnect the TCM B112 harness connector
if disconnected.
5
4. Disconnect the data recording module (DRM)
B231 harness connector.
5. Turn ON the ignition, with the engine OFF.
6. Monitor the DTC Information with a scan tool.
Is DTC U0073 set?
1. Turn OFF the ignition.
2. Reconnect the DRM B231 harness connector.
3. Remove the bezel surrounding the instrument
panel (IP) cluster enough to remove the IP
cluster.
6
4. Disconnect the IP cluster B105 harness
connector.
5. Turn ON the ignition, with the engine OFF.
6. Monitor the DTC Information with a scan tool.
Is DTC U0073 set?
1. Test the CAN Low and High circuits among
each control
conditions:
• A short circuit each other
7
• A short to ground
• A short to battery or ignition voltage
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
Replace the IP cluster. Refer to Instrument Panel
(IP) Cluster in Section 9E Instrumentation/ Driver
8
Info.
Did you complete the replacement?
Important: Replacement
programmed.
Replace the EHCU. Refer to EHCU in Section 4C1
9
ABS/ ASR.
Did you complete the replacement?
Replace the DRM.
10
Did you complete the replacement?
Action
module for the following
EHCU must
Value(s)
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be
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Yes
Go to Step 11 Go to Step 5
Go to Step 6 Go to Step 10
Go to Step 7 Go to Step 8
Go to Step 13 Go to Step 12
Go to Step 13
Go to Step 13
Go to Step 13
No
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