Isuzu Trooper (1998-2002 year). Service manual — part 1105
9J1–57
RESTRAINT CONTROL SYSTEM
DTC 44 Driver Pretensioner Loop Open
D09RW014
Circuit Description:
When the ignition switch is turned “ON”, the SDM will
perform tests to diagnose critical malfunctions within
itself. Upon passing these tests, “Ignition 1”, and
pretensioner loop voltages are measured to ensure they
are within their respective normal voltage ranges.
During “Continuous Monitoring” diagnostics, a fixed
amount of current is following in the pretensioner loop.
This produces proportional voltage drops in the loop. By
monitoring the voltage difference between “Driver Belt
High” and “Driver Belt Low”, the SDM calculates the
combined resistance of the driver pretensioner assembly,
harness wiring IB13–BLU/RED and IB14–BLU/YEL, and
connector terminal contact.
DTC Will Set When:
The voltage difference between “Driver Belt High”
terminal “21” and “Driver Belt Low” terminal “22” is above
or equal to a specified value for 500 milliseconds during
“Continuous Monitoring”.
Action Taken:
SDM turns “ON” the “AIR BAG” warning lamp and sets a
diagnostic trouble code.
DTC Will Clear When:
The voltage difference between “Driver Belt High”
terminal “21” and “Driver Belt Low” terminal “22” is below
a specified value for 500 milliseconds during “Continuous
Monitoring”.
DTC Chart Test Description:
Number(s) below refer to step number(s) on the
diagnostic chart:
2. This test determines whether the malfunction is in
the SDM.
3. This test verifies proper connection of the yellow
2–pin connector at the base of the driver seat.
4. This test checks for proper contact and/or corrosion
of the yellow 2–pin connector at the base of the
driver seat.
5. This test isolates the malfunction to one side of the
driver pretensioner assembly yellow 2–pin
connector located at the base of driver seat.
6. This test determines whether the open is in the
wiring.
Diagnostic Aids:
An intermittent condition is likely to be caused by a poor
connection at the driver pretensioner assembly harness
2–pin connector terminals “3” and “4” at the top of the
steering column, SDM terminals “21” and “22”, or an open
in IB13–BLU/RED and IB14–BLU/YEL.
RESTRAINT CONTROL SYSTEM
9J1–58
DTC 44 Driver Pretensioner Loop Open
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. When measurements are requested in this chart use
5–8840–0285–0 DVM with correct terminal adapter from
5–8840–0385–0.
2. Use scan tool data list function, read and record the driver
pretensioner circuit differential voltage.
Is driver pretensioner VDIF more than 4.25 volts?
Go to Step 3
Go to Chart A
3
1. Ignition switch “OFF.”
2. Make sure the driver pretensioner assembly yellow 2–pin
connector located at the base of the driver seat is seated
properly.
Is the yellow 2–pin connector connected properly?
Go to Step 4
Seat driver
pretensioner
assembly 2–pin
connector
Go to Step 7
4
1. Disconnect and inspect the driver pretensioner assembly
yellow 2–pin connector located base of the driver seat.
2. If ok, reconnect the driver pretensioner assembly yellow 2–pin
connector.
3. Ignition switch “ON.”
Is DTC 44 current?
Go to Step 5
Go to Step 7
5
1. Ignition switch “OFF”.
2. Disconnect driver pretensioner assembly, yellow 2–pin
connectors located at the base of the driver seat.
3. Connect SRS driver/passenger load tool 5–8840–2421–0 and
appropriate adapter to driver pretensioner assembly harness
connectors.
4. Ignition switch “ON.”
Is DTC 44 current?
Go to Step 6
Go to Step 7
6
1. Ignition switch “OFF.”
2. There has been an open circuit in the driver pretensioner loop.
3. Use the high resolution ohmmeter mode of the DVM while
checking IB13–BLU/RED and IB14–BLU/YEL, and SDM
connector terminal “21” and “22” to locate the root cause.
Was a fault found?
Replace SRS
harness or repair
chassis harness
Go to Step 7
Go to Chart A
7
1. Reconnect all components ensure all component are properly
mounted.
2. Clear diagnostic trouble codes.
Was this step finished?
Repeat the “SRS
Diagnostic
System Check”
Go to Step 7
9J1–59
RESTRAINT CONTROL SYSTEM
DTC 45 Driver Pretensioner Loop Short To Ground
D09RW014
Circuit Description:
When the ignition switch is turned “ON”, the SDM will
perform tests to diagnose critical malfunctions within
itself. Upon passing these tests, “Ignition 1”, and
pretensioner loop voltages are measured to ensure they
are within their respective normal voltage ranges.
The SDM monitors the voltage at “Driver Belt Low”
terminal “22” and “passenger Belt Low” terminal “10” to
detect shorts to ground in the air bag assembly circuits.
DTC Will Set When:
Neither of the air bag and the pretensioner belt are open.
“Ignition 1” is within the normal operating voltage range.
This test is run once each ignition cycle and “Continuous
Monitoring”. Once these conditions are met and the
voltage at “Driver Belt Low” is below a specified value,
DTC 45 will set.
Action Taken:
SDM turns “ON” the “AIR BAG” warning lamp and sets a
diagnostic trouble code.
DTC Will Clear When:
The malfunction is no longer occurring and the ignition is
turned “OFF”.
DTC Chart Test Description:
Number(s) below refer to step number(s) on the
diagnostic chart:
2. This test determines whether the SDM is
malfunctioning
3. This test isolates the malfunction to one side of the
driver pretensioner assembly yellow 2–pin
connector at the base of the driver seat.
4. This test determines whether the malfunction is in
IB13–BLU/RED.
5. This test determines whether the malfunction is in
IB14–BLU/YEL.
Diagnostic Aids:
An intermittent condition is likely to be caused by a short
to ground in the driver pretensioner assembly circuit.
Inspect IB13–BLU/RED and IB14–BLU/YEL carefully for
cutting or chafing.
RESTRAINT CONTROL SYSTEM
9J1–60
DTC 45 Driver Pretensioner Loop Short To Ground
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. When measurements are requested in this chart use
5–8840–0285–0 DVM with correct terminal adapter from
5–8840–0385–0.
2. Ignition switch “OFF.”
3. Connect scan tool data link connector. follow directions as
given in the scan tool operator’s manual.
4. Ignition switch “ON.”
5. Read driver belt sense LO.
Is driver belt sense LO less than 1.5 volts?
Go to Step 3
Go to Chart A
3
1. Ignition switch “OFF.”
2. Disconnect driver pretensioner assembly yellow 2–pin
connector located at base of the driver seat, leave passenger
pretensioner assembly connected.
3. Connect SRS driver / passenger load tool 5–8840–2421–0
and appropriate adapter to driver pretensioner assembly
harness connector.
4. Ignition switch “ON.”
Is DTC 45 current?
Go to Step 4
Go to Step 6
4
1. Ignition switch “OFF.”
2. Disconnect SDM.
3. Disconnect SRS driver / passenger load tool.
4. Measure resistance on SDM harness connector “21” to
terminal “6” (ground).
Does 5–8840–0285–0 display “OL” (infinite)?
Go to Step 5
Replace SRS
harness or repair
chassis harness
Go to Step 6
5
Measure resistance on SDM harness connector from terminal
“22” to terminal “6” (ground).
Does 5–8840–0285–0 display “OL” (infinite)?
Go to Chart A
Replace SRS
harness or repair
chassis harness
Go to Step 6
6
1. Reconnect all components ensure all component are properly
mounted.
2. Clear diagnostic trouble codes.
Was this step finished?
Go to the “SRS
Diagnostic
System Check”
Go to Step 6
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст