Opel Frontera UBS. Service manual — part 1805
SUPPLEMENTAL RESTRAINT SYSTEM
9J–50
Main Data and Specifications
Fastener Tightening Specification
Application
N·m
Kg·m
Lb Ft
Lb In.
SDM
10
1.0
—
87
Driver air bag fixing bolt
8.8
0.9
—
78
Steering wheel fixing bolt
34
3.5
25
—
Steering column (dash panel side fixing bolts)
19
1.9
14
—
Steering column (Pedal bracket fixing bolt)
17
1.7
13
—
Steering column (Universal joint fixing bolt)
25
2.6
18
—
Passenger Air Bag fixing bolts and nuts
6
0.6
—
52
9J1–1
RESTRAINT CONTROL SYSTEM
RESTRAINT CONTROL SYSTEM
CONTENTS
Service Precaution
9J1–1
. . . . . . . . . . . . . . . . . . . . . .
Diagnostic Information
9J1–2
. . . . . . . . . . . . . . . . . . .
System Schematic
9J1–4
. . . . . . . . . . . . . . . . . . . . . .
SRS Diagnostic System Check
9J1–4
. . . . . . . . . . . .
Chart A SDM Integrity Check
9J1–6
. . . . . . . . . . . . .
Chart B “AIR BAG” Warning Lamp
Comes “ON” Steady
9J1–8
. . . . . . . . . . . . . . . . . . . .
Chart C “AIR BAG” Warning Lamp
Does Not Come “ON” Steady
9J1–10
. . . . . . . . . . . . .
DTC 15 Passenger Deployment Loop
Resistance High
9J1–13
. . . . . . . . . . . . . . . . . . . . . . . .
DTC 16 Passenger Deployment loop
Resistance Low
9J1–15
. . . . . . . . . . . . . . . . . . . . . . . .
DTC 17 Passenger Deployment Loop
Open
9J1–17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 18 Passenger Deployment Loop
Short To Ground
9J1–19
. . . . . . . . . . . . . . . . . . . . . . . .
DTC 19 Passenger Deployment Loop
Short To B+
9J1–21
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 21 Driver Deployment Loop
Resistance High
9J1–23
. . . . . . . . . . . . . . . . . . . . . . . .
DTC 22 Driver Deployment Loop
Resistance Low
9J1–26
. . . . . . . . . . . . . . . . . . . . . . . .
DTC 24 Driver Deployment Loop
Short To Ground
9J1–29
. . . . . . . . . . . . . . . . . . . . . . . .
DTC 25 Driver Deployment Loop
Short To B+
9J1–31
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 26 Driver Deployment Loop Open
9J1–33
. . . .
DTC 51 Air Bag Deployment Event
Commanded
9J1–35
. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 53 Deployment Commanded With
Deployment Loop Fault Or Energy
Reserves Out Of Range
9J1–37
. . . . . . . . . . . . . . . . .
DTC 61 Warning Lamp Circuit Failure
9J1–39
. . . . .
DTC 71 Internal SDM Fault
9J1–41
. . . . . . . . . . . . . .
DTC 29 Passenger Pretensioner Loop
Short To Ground
9J1–43
. . . . . . . . . . . . . . . . . . . . . . . .
DTC 31 Passenger Pretensioner Loop
Resistance High
9J1–45
. . . . . . . . . . . . . . . . . . . . . . . .
DTC 32 Passenger Pretensioner loop
Resistance Low
9J1–47
. . . . . . . . . . . . . . . . . . . . . . . .
DTC 33 Passenger Pretensioner Loop
Short To Voltage
9J1–49
. . . . . . . . . . . . . . . . . . . . . . . .
DTC 34 Passenger Pretensioner Loop
Open
9J1–51
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 41 Driver Pretensioner Loop
Resistance High
9J1–53
. . . . . . . . . . . . . . . . . . . . . . . .
DTC 42 Driver Pretensioner Loop
Resistance Low
9J1–55
. . . . . . . . . . . . . . . . . . . . . . . .
DTC 44 Driver Pretensioner Loop
Open
9J1–57
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC 45 Driver Pretensioner Loop
Short To Ground
9J1–59
. . . . . . . . . . . . . . . . . . . . . . . .
DTC 46 Driver Pretensioner Loop
Short To Voltage
9J1–61
. . . . . . . . . . . . . . . . . . . . . . . .
DTC 52 Pretensioner Deployment
Event Commanded
9J1–63
. . . . . . . . . . . . . . . . . . . . .
Service Precaution
WARNING: IF SO EQUIPPED WITH 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.
RESTRAINT CONTROL SYSTEM
9J1–2
Diagnostic Information
CAUTION: When fasteners are removed, always
reinstall them at the same location from which they
were removed. if a fastener needs to be replaced, use
the correct part number fastener for that application.
if the correct part number fastener is not available, a
fastener of equal size and strength (or stronger) may
be used. fasteners that are not reused, and those
requiring thread locking compound will be called
out. the correct torque value must be used when
installing fasteners that require it. if the above
conditions are not followed, parts or system damage
could result.
Diagnostic Procedures
WARNING: TO AVOID DEPLOYMENT WHEN
TROUBLESHOOTING THE SRS, DO NOT USE
ELECTRICAL TEST EQUIPMENT SUCH AS A
BATTERY–POWERED OR AC–POWERED
VOLTMETER, OHMMETER, ETC., OR ANY TYPE OF
ELECTRICAL EQUIPMENT OTHER THAN THAT
SPECIFIED IN THIS MANUAL. DO NOT USE A NON
POWERED, PROBE–TYPE TESTER.
INSTRUCTIONS IN THIS MANUAL MUST BE
FOLLOWED CAREFULLY, OTHERWISE PERSONAL
INJURY MAY RESULT.
The diagnostic procedures used in this section are
designed to aid in finding and repairing SRS problems.
Outlined below are the steps to find and repair SRS
problems quickly and effectively. Failure to carefully
follow these procedures may result in extended
diagnostic time, incorrect diagnosis and incorrect parts
replacement.
1. Perform The “SRS Diagnostic System Check”.
The “SRS Diagnostic System Check” should always
be the starting point of any SRS diagnostics. The
“SRS Diagnostic System Check” checks for proper
“AIR BAG” warning lamp operation and checks for
SRS trouble codes using both “Flash Code” and
“Scan Tool” Methods.
2. Refer To The Proper Diagnostic Chart As Directed
By The “SRS Diagnostic System Check”.
The “SRS Diagnostic System Check” will lead you to
the correct chart to diagnose any SRS problems.
Bypassing these procedures may result in extended
diagnostic time, incorrect diagnosis and incorrect
parts replacement.
3. Repeat The “SRS Diagnostic System Check”
After Any Repair Or Diagnostic Procedures Have
Been Performed.
Preforming the “SRS Diagnostic System Check” after
all repair or diagnostic procedures will assure that the
repair has been made correctly and that no other
conditions exist.
Diagnostic Codes
The Sensing and Diagnostic Module (SDM) maintains a
history record of all diagnostic codes that have been
detected since the SRS codes were last cleared during
service.
1. Active Codes — Faults that are presently detected
this ignition cycle. Active codes are stored in RAM
(Random Access Memory).
2. History Codes — All faults detected since the last
time the history fault memory was cleared. History
codes are stored in EEPROM. (Electronically
Erasable Programmable Read only Memory)
How To Read Trouble Codes
All codes (Active and history) can be read (or cleared) by
using a scan tool or equivalent.
If a PDT is not available, have the vehicle serviced by
ISUZU dealer.
How To Clear Trouble Codes
Trouble codes can only be cleared by using a Scan Tool.
If a “scan tool” is not available then inform the owner of the
stored codes and suggest that the codes are cleared
upon the next visit to an Isuzu dealership.
Scan Tool Diagnostics
A scan tool can be used to read current and history codes
and to clear all history codes after a repair is complete.
The scan tool must be updated to communicate with the
SRS through a memory card or a manufacturer’s update
before it can be used for SRS diagnostics. To use the
scan tool, connect it to the DLC connector and turn the
ignition switch “ON”. Then follow the manufacturer’s
directions for communication with the SRS. The scan tool
reads serial data from the SDM “Serial Data” output
(terminal 24) to the DLC connector (terminal 9).
Basic Knowledge Required
Before using this section of the Service Manual, there is
some basic knowledge which will be required. Without
this knowledge, you will have trouble using the diagnostic
procedures in this section. Use care to prevent harm or
unwanted deployment. Read all cautions in the service
manual and on warning labels attached to SRS
components.
Basic Electrical Circuits
You should understand the basic theory of electricity
including series and parallel circuits, and understand the
voltage drops across series resistors. You should know
the meaning of voltage (volts), current (amps), and
resistance (ohms). You should understand what happens
in a circuit with an open or a shorted wire. You should be
able to read and understand a wiring diagram.
“Flash Code” Diagnostics
Flash code diagnostics can be used to read active codes
and to determine if history codes are present but cannot
be used to clear codes or read history codes. Flash code
diagnostics is enabled by grounding by terminal 4
shorting to terminal 13 of the DLC connector with the
ignition switch “ON”. Grounding terminal 4 of the DLC
connector pulls the “Diagnostics Request” input (Terminal
1) of the SDM low and signals the SDM to enter the flash
code diagnostic display mode.
9J1–3
RESTRAINT CONTROL SYSTEM
The SDM displays the trouble codes by flashing the
warning lamp. Each code that is displayed will consist of a
number of flashes which represents the tens digit, a 1.2
second pause, following by a number of flashes which
represents the ones digit of the code. Each code is
displayed one time before moving on to the next code.
After all of the codes have been displayed, the entire code
sequence will continually by repeated until ground is
removed from terminal 4 of the DLC connector.
Two special codes exist when reading in the flash code
mode (Flash Code 12 and Flash Code 13). “Flash Code
12“ will always be the first code displayed when the flash
code mode is enable Code 12 is not an indication of a SRS
problem but an indication that the flash code mode has
been enabled. If there are no active or history codes
present, the SDM will display code 12 until ground is
removed from the DLC connector at terminal 4. “flash
Code 13” will be displayed if history codes are present. To
read the history codes a scan tool must be used.
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