Diagnostic Trouble Code (Dtc) P1380 Abs Rough Road Abs System Fault; Dtc P1380 – Abs Rough Road Abs System Fault - Isuzu Trooper 1999 Workshop Manual

Diagnostic Trouble Code (DTC) P1380 ABS Rough Road ABS System Fault

Circuit Description
The powertrain control module (PCM) monitors ABS fault
signal. When PCM receives fault signal, PCM will set
DTC P1380.
Conditions for Setting the DTC
f Vehicle speed is more than 5 mph.
f Load is less than 99%.
f Engine revolution is less than 6250 rpm.
f PCM receives ABS fault signals from ABS unit.
f Ignition on.
f Misfire DTCs exist.
f 100 test failures within 120 test samples.
Action Taken When the DTC Sets
f The PCM will store DTC 1380 only, no MIL turn on.
DTC P1380 – ABS Rough Road ABS System Fault
Step
1 Was the "On-Board Diagnostic (OBD) System Check"
performed?
2 1. Ignition "ON," engine "OFF", review and record
Tech 2 Failure Records Data.
2. Operate the vehicle within Failure Records
conditions as noted.
3. Using a Tech 2, monitor "DTC" info for DTC P1380
and Misfire DTCs until the DTC P1380 and Misfire
DTCs test runs. Note the result.
Does the Tech 2 indicates DTC P1380 and Misfire
DTCs failed this ignition?
3 Check short circuit among communication line of
PCM/ABS and others.
Does short circuit exist?
4 Replace the PCM.
IMPORTANT: The
programmed.
Powertrain Control
procedures.
And also refer to latest Service Bulletin.
Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
Is the action complete?
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Action
replacement PCM
Refer to On-Vehicle Service in
Module and Sensors
Conditions for Clearing the MIL/DTC
f A history DTC P1380 will clear after 40 consecutive
warm-up cycles have occurred without a fault.
f DTC 1380 can be cleared by using Tech-2 or
disconnecting the PCM battery feed.
Diagnostic Aids
Check for the following conditions:
f PCM and ABS communication line short circuit to other
line may cause faulty signal. Inspect communication
line.
f Follow ABS ECU diagnosis procedure, refer to ABS
procedure page.
Value(s)
—
—
—
must be
for
—
Yes No
Go to OBD
System
Go to Step 2 Check
Refer to ABS
diagnosis
After inspecting
ABS unit repeat
Step 2
If problem still
Clear DTC by
exists, go to
Step 3 Tech 2
Repair wiring
Go to Step 4
Verify repair
Verify repair
6E–411
—