Isuzu N 2008 Series Workshop Manual page 186

Step
Monitor the ABS DTC information with a scan tool.
4
Does the ABS DTCs fail this ignition?
1. Turn OFF the ignition.
2. Disconnect the EHCU harness connector.
3. Inspect for an intermittent, for a poor
connection and corrosion at the harness
connector of the EHCU (pins 14 of J22).
4. Disconnect the ECM harness connector.
5. Inspect for an intermittent, for a poor
5
connection and corrosion at the harness
connector of the ECM (pin 19 of J14).
6. Test for high resistance between each
module.
7. Repair the connection(s) or circuit(s) as
necessary.
Did you find and correct the condition?
1. Inspect the other control module(s) which
shares this vehicle speed signal. Disconnect
the harnnes connector from the module(s) and
retest if installed.
6
2. Disconnect the aftermarket signal pulse pick
up device and retest if installed.
Did you complete the repair or replacement?
1. Reconnect
harness connector(s).
2. Clear the DTCs with a scan tool.
3. Turn OFF the ignition for 30 seconds.
7
4. Drive the vehicle while observing the Vehicle
Speed parameter with a scan tool.
Does the scan tool indicate correct vehicle speed?
Observe the DTC Information with a scan tool.
8
Are there any DTCs that you have not diagnosed?
Action
all previously disconnected
Engine Control System (4JJ1)
Value(s) Yes
Go to Applicable
— DTC for ABS
Section
—
Go to Step 7
—
Go to Step 7
—
Go to Step 8
—
Go to DTC List
1A-183
No
Go to Step 5
Go to Step 6
—
Go to Step 2
System OK