Isuzu 2008MY N Series User Manual

Engine Control System (4HK1) 1A-57
12
Notice: If no HSA system is installed, skip to Step
13.
1. Turn OFF the ignition.
2. Reconnect the ECM E-12 and J-14 harness
connectors if disconnected.
3. Disconnect the HSA control unit B-14 harness
connector.
4. Turn ON the ignition, with the engine OFF.
5. Attempt to communicate with the ECM and
SRS control unit.
Does the scan tool communicate with the
ECM, ICU and SRS control unit?
—
Go to Step 18 Go to Step 13
13
Notice: If no airbag system installed, skip to Step
14.
1. Turn OFF the ignition.
2. Reconnect the HSA control unit B-14 harness
connector if disconnected.
3. Reconnect the ECM E-12 and J-14 harness
connectors if disconnected.
4. Reconnect the TCM B-109, B-110, B-111 and
B-112 harness connectors if disconnected.
5. Disconnect the SRS control unit B-129
harness connector.
6. Turn ON the ignition, with the engine OFF.
7. Attempt to communicate with the ECM, TCM
and HSA control unit.
Does the scan tool communicate with the
ECM, TCM, ICU and HSA control unit?
—
Go to Step 19 Go to Step 14
14
Notice: If no immobilizer system installed, skip to
Step 15.
1. Turn OFF the ignition.
2. Reconnect the HSA control unit B-14 harness
connector if disconnected.
3. Reconnect the ECM E-12 and J-14 harness
connectors if disconnected.
4. Reconnect the TCM B-109, B-110, B-111 and
B-112 harness connectors if disconnected.
5. Reconnect the SRS control unit B-129
harness connector if disconnected.
6. Disconnect the immobilizer control unit (ICU)
harness connector.
7. Turn ON the ignition, with the engine OFF.
8. Attempt to communicate with the ECM, TCM,
HSA control unit and SRS control unit.
Does the scan tool communicate with the
ECM, TCM, HSA control unit and SRS control
unit?
—
Go to Step 20 Go to Step 15
15
Repair the open circuit, short to ground or short to
voltage on the Keyword serial data circuit between
the DLC and ECM, TCM, ICU, HSA control unit or
SRS control unit.
Did you complete the repair?
—
Go to Step 21
—
Step Action Value(s) Yes No
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Isuzu 2008MY N Series Specifications

General

Brand	Isuzu
Model	2008MY N Series
Category	Control Systems
Language	English