Isuzu Trooper (2000 year). Manual - part 536

9J1–39

RESTRAINT CONTROL SYSTEM

DTC 61 Warning Lamp Circuit Failure 

Step

Action

Yes

No

1

Was the “SRS Diagnostic System Check” performed?

Go to Step 2

Go to the “SRS

Diagnostic

System Check.”

2

1. Malfunctions within the “AIR BAG” warning lamp circuitry will

set this diagnostic trouble code.

2. These malfunctions are addressed in the “SRS Diagnostic

System Check” via Chart B and Chart C. 

3. Failure to properly perform the “SRS Diagnostic System

Check” may result in misdiagnosis.

4. Ignition switch “ON.”
5. Clear SRS diagnostic trouble codes.

IS DTC 61 set?

Ignition switch

“OFF.” 

Go to Chart A.

Repeat the “SRS

Diagnostic

System Check.”

RESTRAINT CONTROL SYSTEM

9J1–40

DTC 71  Internal SDM Fault

D09RW001

Circuit Description:

DTC 71 is an indication of a potential internal SDM
malfunction and will set if any of the following conditions
are detected:
1) Deployment or microprocessor energy reserve failure.
2) EEPROM failure.
3) ROM failure.
4) RAM failure.
5) Calibration check sum failure.
6) Deployment switch faults.
7) Accelerometer fault.
8) Arming sensor fault.
9) Diagnostic current faults.
10) DTC 19
11) DTC 25
12) DTC 51
13) DTC 53

DTC Will Set When:

Any of the above indicated malfunctions are detected by
the SDM.  The malfunctions described above are tested
mainly during “Continuous Monitoring” and some ones
run each ignition cycle.

Action Taken:

SDM turns “ON” the “AIR BAG” warning lamp and sets a
diagnostic trouble code.

DTC Will Clear When:

A scan tool “Clear Codes” commanded is received by the
SDM.  Some of the indicated malfunctions will only allow
the “AIR BAG” warning lamp to go out.
But when DTC 19, 25, 51, 53 are also set, SDM is
replaced.

9J1–41

RESTRAINT CONTROL SYSTEM

DTC 71 Internal SDM Fault 

WARNING: DURING SERVICE PROCEDURES. BE VERY CAREFUL WHEN HANDLING A SENSING AND
DIAGNOSTIC MODULE (SDM). NEVER STRIKE OR JAR THE SDM.  NEVER POWER UP THE SRS WHEN THE
SDM IS NOT RIGIDLY ATTACHED TO THE VEHICLE. ALL SDM AND MOUNTING BRACKET FASTENERS MUST
BE CAREFULLY TORQUED AND THE ARROW MUST BE POINTING TOWARD THE FRONT OF THE VEHICLE
TO ENSURE PROPER OPERATION OF THE SRS. THE SDM COULD BE ACTIVATED WHEN POWERED WHILE
NOT RIGIDLY ATTACHED TO THE VEHICLE WHICH COULD CAUSE DEPLOYMENT AND RESULT IN
PERSONAL INJURY.

CAUTION: When DTC 19 or 25 has been set, it is necessary to replace the SDM.  Setting DTC 19 and 25 or 51
or 53 will also cause DTC 71 to set.  When a scan tool “CLEAR CODES” command is issued and the
malfunction is no longer present, DTC 51 or 53 and DTC 71 will remain current.  Ensure that the short to voltage
condition DTC 19, 25 is repaired prior to installing a replacement SDM to avoid damaging the SDM. 

Step

Action

Yes

No

1

Was the “SRS Diagnostic System Check” performed?

Go to Step 2

Go to the “SRS

Diagnostic

System Check”

2

Note SRS “Diagnostic System Check.”

Is DTC 19 or 25 or 51 or 53 also set (CURRENT OR HISTORY)?
(refeer to notice above.)

Go to DTC 19 if

DTC 19 is set

Go to DTC 25 if

DTC 25 is set

Go to DTC 51 if

DTC 51 is set

Go to DTC 53 if

DTC 53 is set

Ignition switch

“OFF”

Replace SDM

Repeat the “SRS

Diagnostic

System Check”

10A–1

CRUISE CONTROL SYSTEM

TROOPER

CONTROL SYSTEM

CRUISE CONTROL SYSTEM

CONTENTS

Service Precaution

10A–1

. . . . . . . . . . . . . . . . . . . . . . 

General Description

10A–1

. . . . . . . . . . . . . . . . . . . . . 

Brake Switch

10A–2

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

Removal

10A–2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Installation

10A–2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Adjustment

10A–3

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

Clutch Switch

10A–3

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

Removal and Installation

10A–3

. . . . . . . . . . . . . . . 

Adjustment

10A–3

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

Starter Switch

10A–4

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

Removal

10A–4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Installation

10A–4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Cruise Control Main Switch

10A–5

. . . . . . . . . . . . . . . 

Removal

10A–5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Installation

10A–5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Cruise Control Switch (Combination Switch)

10A–5

Removal and Installation

10A–5

. . . . . . . . . . . . . . . 

Powertrain Control Module (PCM)

10A–5

. . . . . . . . . 

Removal and Installation

10A–5

. . . . . . . . . . . . . . . 

Mode Switch

10A–5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Removal and Installation

10A–5

. . . . . . . . . . . . . . . 

Diagnosis

10A–6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Service Precaution

WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING, REFER TO
THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.

CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.

General Description

The cruise control keeps the vehicle running at a fixed
speed until a signal canceling this fixed speed is received .
When the main switch “AUTO CRUISE” is turned on with
the vehicle in the running mode, the battery voltage is
applied to the control unit.  When a signal from the control
switch is input to the PCM while the vehicle is in this state,
the cruise control system is activated.  Also, while the
system is operating, the “AUTO CRUISE” indicator light in
the meter assembly lights up.

1. SET/COAST Switch Function

1. Set Function: When the SET/COAST switch is

pressed and released with the main switch on, the
speed at which the vehicle is running at that moment
is stored in the memory, and the vehicle automatically
runs at the stored speed.

2. Coast-down Function: When the SET/COAST

switch is kept on while the vehicle in running, the
vehicle decelerates during that time.  The speed at
which vehicle is running when the control switch is
turned off is stored in the memory, and the vehicle
automatically returns to the stored speed.

3. Tap-down Function: When the SET/COAST switch

is turned on and off instantaneously while the vehicle
is running, the vehicle  decelerates a mile for each
on/off operation. The vehicle speed at which the
vehicle was running when the SET/COAST was
turned off last is stored in the memory, and the vehicle
automatically returns to this stored speed.