Isuzu 2008MY N Series Workshop Manual page 312

Step
Notice: If no Smoother transmission is installed,
skip to Step 6.
1. Reconnect the IP cluster.
2. Measure the resistance between the CAN
Low and High circuitsby probing the IP cluster
5
(pins 13 and 14 of B-105).
3. Disconnect the transmission control module
(TCM) harness connectors.
Is the resistance within the specified value?
1. Reconnect the IP cluster if disconnected.
2. Measure the resistance between the CAN
Low and High circuitsby probing the IP cluster
(pins 13 and 14 of B-105).
6
3. Disconnect the data recording module (DRM)
harness connector or the body control module
(BCM).
Is the resistance within the specified value?
Notice: If no ABS is installed, skip to Step 8.
1. Leave the DMM connected to the IP cluster.
2. Disconnect the electric hydraulic control unit
7
(EHCU) harness connector.
Is the resistance within the specified value?
1. Leave the DMM connected to the IP cluster.
2. Disconnect the VNT control module harness
8
connectors.
Is the resistance within the specified value?
1. Leave the DMM connected to the IP cluster.
2. Disconnect the ECM harness connectors.
9
Is the resistance within the specified value?
Repair the short circuit each other acrocc the CAN
Low and High circuits among each component.
10
Did you find and correct the condition?
1. Turn OFF the ignition.
2. Disconnect the IP cluster, TCM, DRM, BCM,
EHCU, VNT control module and ECM harness
connectors.
3. Test the CAN Low and High circuits among
11
each component for a short to ground and
short to voltage.
4. Repair the circuit(s) as necessary.
Did you find and correct the condition?
Action
Engine Control System (4HK1)
Value(s)
50 to 70 Ω
Go to Step 22
50 to 70 Ω
Go to Step 21
50 to 70 Ω
Go to Step 20
50 to 70 Ω
Go to Step 19
110 to 130 Ω
Go to Step 18
—
Go to Step 23
—
Go to Step 23
Yes No
Go to Step 6
Go to Step 7
Go to Step 8
Go to Step 9
Go to Step 10
—
Go to Step 12
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