ISUZU TROOPER 1995 Workshop Manual

Supplemental Restraint System 9J-57
DTC22
DRIVER INITIATOR CIRCUIT RESISTANCE LOW
STEP
ACTION YES NO
1 WAS THE "SRS
DIAGNOSTIC
SYSTEM CHECK" GOTOSTEP2. GO
TO THE "SRS PERFORMED? DIAGNOSTIC
SYSTEM CHECK."
2 WHEN
MEASUREMENTS ARE REQUESTED IN THIS CHART GOTOSTEP6. GOTOSTEP3.
USE J-39200 DVM WITH CORRECT TERMINAL ADAPTER FROM J-35616-A. IS DTC 16 ALSO CURRENT?
3
IGNITION SWITCH "OFF." GOTOSTEP4. GOTO STEP7.
DISCONNECT DRIVER
AND PASSENGER INFLATOR
MODULES, YELLOW 2-WAY OR 4-WAY CONNECTORS
LOCATED
AT THE TOP OF THE STEERING COLUMN AND BEHIND THE 1/P COMPARTMENT DOOR ASSEMBLY.
CONNECT J-41433 SRS DRIVER/PASSENGER LOAD TOOL
TO STEERING COLUMN HARNESS CONNECTOR AND PASSENGER INFLATOR MODULE HARNESS CONNECTOR.
IGNITION SWITCH "ON."
IS
DTC 22 CURRENT?
4
IGNITION SWITCH "OFF." GOTOSTEP5. GOTOSTEP8.
DISCONNECT SRS COIL.
DISCONNECT DERM.
MEASURE RESISTANCE ON DERM HARNESS CONNECTOR
FROM TERMINAL "B8" TO TERMINAL "B9".
DOES
J-39200 DISPLAY "OL"(INFINITE)?
5
REPLACE SRS COIL, REFER TO IN THIS SECTION 3. GO TO CHART A.
6 IGNITION SWITCH "OFF." GOTOSTEP9. DISCONNECT
DRIVER AND PASSENGER INFLATOR
MODULE, YELLOW 2-WAY OR 4-WAY CONNECTORS
LOCATED AT THE TOP OF THE STEERING COLUMN AND
BEHIND THE 1/P COMPARTMENT DOOR ASSEMBLY. REPLACE SRS HARNESS.
7 IGNITION SWITCH "OFF." GOTOSTEP9.
REPLACE DRIVER INFLATOR MODULE, REFER TO SECTION 3F.
8 REPLACE SRS HARNESS. GOTOSTEP9.
9 RECONNECT ALL SRS SYSTEM COMPONENTS, ENSURE GO TO THE "SRS DYAGNOSTIC SYSTEM ALL COMPONENTS ARE PROPERLY MOUNTED. CHECK" CLEAR SRS DIAGNOSTIC TROUBLE CODE. REPEAT THE "SRS DIAGNOSTIC SYSTEM CHECK."

9J-58 Supplemental Restraint System
DTC23
DRIVER INITIATOR CIRCUIT VOLTAGE HIGH
CIRCUIT DESCRIPTION
During normal, non-deployment operation of the SRS,
a small amount of current flows through both the driver
and passenger deployment loops. The diagnostic
resistors within the dual pole arming sensor and the
discriminating sensors
along with the resistance of the
inflator modules cause voltage drops within the
deployment loops. The DERM monitors the voltage at
"Driver Side
Low" terminal "88" to detect shorts or opens
within the driver
deployment loop. When the measured
voltage is above a specified percentage of "Driver 36
VLR for
500 milliseconds DTC 23 is set.
DTC WILL SET WHEN
The voltage measured at "Driver Side Low" terminal "88"
is above a specified percentage of "Driver 36 VLR" for
500 milliseconds and DTC 35 is not set. This test is run
during the
"Continuous Monitoring" tests.
ACTION TAKEN
DERM turns "ON" the "AIR BAG" warning lamp and sets
a diagnostic trouble code.
DTC WILL CLEAR WHEN
The voltage measured at "Driver Side Low" terminal "88"
is within a specified percentage of "Driver 36 VLR" for
500 milliseconds.
DTC CHART TEST DESCRIPTION
Number(s) below refer to step number(s) on the
diagnostic chart.
2. DTC 19 and 23 together means that there is both
open FORWARD
SENSOR LH and FORWARD
SENSOR RH, or internal short in dual pole arming
sensor.
3. This test determines whether the
malfunction is an
open in SRS HARNESS.
DIAGNOSTIC AIDS
An open between the driver inflator module harness
connector and the discriminating sensor interconnect
causes the
voltage to increase at "Driver Side Low" due
to the
loss of a ground path. This also causes the voltage
to decrease at "Passenger Side Low'' due to decreased
current
flow through the discriminating sensor network.
OERM
IGNITION 1
IGNITION 1 DRIVER SOURCE SENSE DRIVER 38VLR PASS. 38VLR PASS. SOURCE SENSE
REDUNDAT INDICATOR GROUND
PASS SIDE HIGH
PASS SIDE LOW
SRS INDICATOR
•

Supplemental Restraint System 9J-59
DTC23
DRIVER INITIATOR CIRCUIT RESISTANCE HIGH
STEP
ACTION YES NO
1 WAS THE "SRS DIAGNOSTIC SYSTEM CHECK" GOTOSTEP2. GO TO THE SRS PERFORMED? DIAGNOSTIC
SYSTEM CHECK."
2
WHEN MEASUREMENTS ARE REQUESTED IN THIS CHART GO TO DTC 19. GOTO STEP3.
USE J-39200 DVM WITH CORRECT TERMINAL ADAPTER FROM J-35616-A. IS DTC 19 ALSO CURRENT?
3
IGNITION SWITCH "OFF." GO TO CHART A. GOTOSTEP4.
DISCONNECT DRIVER AND PASSENGER INFLATOR
MODULES, YELLOW 2-WAY OR 4-WAY CONNECTORS
LOCATED AT THE TOP OF THE STEERING COLUMN AND BEHIND 1/P COMPARTMENT DOOR ASSEMBLY AND.
MEASURE RESISTANCE FROM SRS COIL HARNESS
CONNECTOR TERMINAL "1" TO PASSENGER INFLATOR
MODULE HARNESS CONNECTOR TERMINAL
"3". IS RESISTANCE 5.0 Q OR LESS?
4 DISCONNECT SRS COIL , YELLOW 3-WAY CONNECTOR GOTOSTEP5. GOTOSTEP6.
LOCATED NEAR THE BASE OF THE STEERING COLUMN. MEASURE RESISTANCE FROM SRS COIL CONNECTOR
TERMINAL INFLATOR SIDE TERMINAL "1" TO SRS HARNESS
SIDE TERMINAL "3".
IS RESISTANCE 2.00 OR LESS?
5 REPLACE SRS HARNESS. GOTOSTEP6.
6 REPLACE SRS COIL, REFER TO IN THIS SECTION 3. GOTOSTEP6.
7 RECONNECT ALL SRS
COMPONENT, ENSURE ALL GO TO THE "SRS
DIAGNOSTIC SYSTEM
COMPONENTS
ARE PROPERLY MOUNTED. CHECK". CLEAR SRS DIAGNOSTIC TROUBLE CODES. REPEAT THE "SRS DIAGNOSTIC SYSTEM CHECK".

9J-60 Supplemental Restraint System


DTC 24 {PAGE 1 OF 3)
INITIATOR CIRCUIT VOLTAGE LOW
' I,
CIRCUIT DESCRIPTION
During normal, non-deployment operation of the SRS,
a small amount of current flows through both the driver
and passenger deployment loops. The diagnostic
resistors within the dual pole arming sensor and the
discriminating sensors
along with the resistance of the
inflator modules cause voltage drops within the
deployment loops. The DERM monitors the voltage at
"Driver Side Low" terminal "88" and "Passenger Side
Low" terminal "87" to detect shorts or opens within the
driver deployment
loop. When the measured voltage at
terminal "88" or "87" is below a specified percentage of
its respective Driver 36 VLR power
supply voltage for
500 milliseconds DTC 24 is set.
DTC WILL SET WHEN
The voltage measured at "Driver Side Low" terminal "88"
is below a specified percentage of "Driver 36 VLR" or
when the
voltage measured at "Passenger Side Low"
terminal "87" is below a specified percentage of
"Passenger 36 VLR" for 500 milliseconds. This test is run
during the "Continuous Monitoring" test.
ACTION TAKEN
DERM turns "ON" the "AIR BAG" warning lamp and sets
a diagnostic
trouble code.
DTC WILL CLEAR WHEN
The voltage measured at "Driver Side Low" terminal "88"
is within a specified percentage of "Driver 36 VLR" and
the
voltage measured at "Passenger Side Low" terminal
"87"
is within a specified percentage of "Passenger 36
VLR" for 500 milliseconds.
DTC CHART TEST DESCRIPTION
Number(s) below refer to step number(s) on the
diagnostic chart.
2. This test determines whether the malfunction is
occurring
in the steering column circuitry.
3. This test determines whether the malfunction is
occurring
in the passenger inflator module circuitry.
4. This test check's for a short from the SRS COIL to
ground.
DIAGNOSTIC AIDS
An intermittent condition is likely to be caused by a poor
connection at DERM terminals
"A3" and "A4", dual pole
arming sensor terminals "2", "4", "5" or"7",water intrusion
in any discriminating sensor, an open in CKT 1810 or
CKT 1815, ora short to ground in CKT's 1810,1815, 1816,
1817, 1818,
1819, 1820, 1821, 1822, 1824, 1825, 1836.
Refer to DTC 25 diagnose a possible short to B+. When
the malfunction occurs during
an ignition cycle DTC 24
will set. If the malfunction is present at the beginning of
the next ignition
cycle DTC 25 will set and DTC 24 will be
moved to a history
file.
SAS·1 JOINT CONNEC'TlON ,, .
PASS SIDE HIGH PASS SIDE LOW
SRS INDICATOR

STEP
1
2
3
4
5 6
7
8
Supplemental Restraint System 9J-61
TC 24 (PAGE 1 OF 3)
INITIATOR CIRCUIT VOLTAGE LOW
ACTION YES NO
WAS
THE "SRS DIAGNOSTIC SYSTEM
CHECK" GOTOSTEP2. GO TO THE SRS PERFORMED? DIAGNOSTIC
SYSTEM CHECK."
WHEN MEASUREMENTS ARE REQUESTED IN THIS CHART GOTOSTEP3. GOTOSTEP5.
USE J-39200 DVM WITH CORRECT TERMINAL ADAPTER FROM ~35616-A. IGNITION SWITCH "OFF."
DISCONNECT DRIVER INFLATOR
MODULE, YELLOW 2-WAY
CONNECTOR AT THE TOP OF THE STEERING COLUMN, LEAVE PASSENGER INFLATOR MODULE CONNECTED.
CONNECT SRS DRIVER/PASSENGER LOAD TOOL
J-41433 TO DRIVER INFLATOR MODULE HARNESS CONNECTOR.
IGNITION SWITCH "ON."
IS DTC
24 CURRENT?
IGNITION SWITCH "OFF." GOTOSTEP4. GOTOSTEP6.
DISCONNECT PASSENGER INFLATOR MODULE YELLOW 4-WAY
CONNECTOR LOCATED BEHIND THE 1/P ' COMPARTMENT DOOR ASSEMBLY.
CONNECT SRS DRIVER/PASSENGER INFLATOR MODULE HARNESS
CONNECTOR, LEAVE DRIVER INFLATOR MODULE HARNESS CONNECTOR CONNECTED TO LOAD
TOOL. IGNITION SWITCH "ON." IS DTC
24 CURRENT?
IGNITION SWITCH "OFF." GOTOSTEP7. CONTINUE WITH
DISCONNECT
YELLOW 3-WAY SRS COIL CONNECTOR DIAGNOSIS
ON
LOCATED NEAR THE BASE OF THE STEERING COLUMN. NEXT PAGE.
DISCONNECT DERM. MEASURE
RESISTANCE ON SRS COIL HARNESS
CONNECTOR TERMINAL "3" TO DERM HARNESS
CONNECTOR TERMINAL "A1".
IS RESISTANCE
5.00 OR LESS?
IGNITION SWITCH "OFF."
GOTOSTEP8. REPLACE INFLATOR MODULE AT THE TOP OF THE STEERING COLUMN REFER TO IN THIS SECTION 3.
IGNITION SWITCH "OFF." GOTOSTEP8. REPLACE INFLATOR MODULE IN THE 1/P COMPONENT.
REPLACE SRS COIL.
GOTOSTEP8.
RECONNECT ALL SRS COMPONENTS, ENSURE ALL GO TO THE "SRS DIAGNOSTIC SYSTEM
COMPONENTS SRS PROPERLY MOUNTED. CHECK".
CLEAR SRS DIAGNOSTIC TROUBLE CODES. REPEAT THE "SRS DIAGNOSTIC SYSTEM CHECK".

9J-62 Supplemental Restraint System
DTC 24 (PAGE 2 OF 3)
INITIATOR CIRCUIT VOLTAGE LOW
CIRCUIT DESCRIPTION
During normal, non-deployment operation of the SRS,
a small amount of current flows through both the driver
and
passenger deployment loops. The diagnostic
resistors within the dual pole arming sensor and the
discriminating sensors
along with the resistance of the
inflator modules cause voltage drops within the
deployment loops. The DERM monitors the voltage at
"Driver
Side Low" terminal "88" and "Passenger Side
Low" terminal "87"
to detect shorts or opens within the
driver deployment
loop. When the measured voltage at
terminal "88" or "87" is below a specified percentage of
its respective Driver 36 VLR power
supply voltage for
500 milliseconds DTC 24 is set.
DTC WILL SET WHEN
The voltage measured at "Driver Side Low'' terminal "88"
is below a specified percentage of "Driver 36 VLR" or
when the
voltage measured at "Passenger Side Low"
terminal "87" is below a specified percentage of
"Passenger 36 VLR" for 500 milliseconds. This test is run
during the "Continuous Monitoring" test.
ACTION TAKEN
DERM turns "ON" the "AIR BAG" warning lamp and sets
a diagnostic
trouble code.
""
DTC WILL CLEAR WHEN
The voltage measured at "Driver Side Low" terminal "88"
is within a specified percentage of "Driver 36 VLR" and
the
voltage measured at "Passenger Side Low" terminal
"87"
is within a specified percentage of "Passenger 36
VLR" for 500 milliseconds.
DTC CHART TEST DESCRIPTION
Number(s) below refer to step number(s) on the
diagnostic chart.
10. This test checks for a short from the low side of the
driver deployment
loop to ground.
11. This test checks for a partial short across the
diagnostic resistor in the forward discriminating
sensor.
12.
This test checks for a partial short across the
diagnostic resistor in the passenger compartment
discriminating sensor.
13. This test checks for a short from the discriminating
sensor interconnect circuit to ground.
14. This test checks for a short from the
low side of the
driver deployment
loop to ground.
DIAGNOSTIC AIDS
Refer to DTC 24(Page 1 of 3).
SRS-1 JOINT CONNECTION 1 10 180& IGNITION 1 IGNITION 1 DRIVER SOURCE SENSE DRIVER 36VLR PASS. 38VLR PASS. SOURCE SENSE
AEOUNDAT INotCATOR GROUND
PASS SlOE HIGH PASS SIDE LOW
SPARE/LPS
SERIAL DATA
SRS INDICATOR

STEP
9
10
11
12
13
14
15
16
17
18
19
20
Supplemental Restraint System 9J-63
DTC 24 (PAGE 2 OF 3)
INITIATOR CIRCUIT VOLTAGE LOW
ACTION YES NO
WERE YOU
SENT HERE FROM DTC 24(PAGE 1 OF 3)? GO TO STEP1 0. GO TO DTC 24(PAGE
1 OF 3).
IGNITION SWITCH "OFF." GO TO STEP11. CONTINUE WITH
DISCONNECT DERM. DIAGNOSIS ON
DISCONNECT SRS DRIVER/PASSENGER LOAD TOOL. NEXT PAGE.
MEASURE RESISTANCE ON DERM HARNESS CONNECTOR
FROM TERMINAL"B9" TO TERMINAL "A 1."
IS RESISTANCE5.0il OR LESS?
DISCONNECT
FORWARD LH DISCRIMINATING SENSOR. GO TO STEP16. GO TO STEP12.
MEASURE RESISTANCE OF
FORWARD LH DISCRIMINATING
SENSOR FROM TERMINAL "1" TO TERMINAL "2".
IS RESISTANCE LESS THAN 8.36Kn?
RECONNECT FORWARD LH DISCRIMINATING SENSOR. GO TO STEP17. GO TO STEP13.
DISCONNECT
FORWARD RH DISCRIMINATING SENSOR.
MEASURE RESISTANCE OF FORWARD RH DISCRIMINATING
SENSOR FROM TERMINAL "1" TO TERMINAL "2".
IS RESISTANCE LESS
THAN 8.36Kn?
RECONNECT FORWARD RH DISCRIMINATING SENSOR. GO TO STEP18. GO TO STEP14.
DISCONNECT
ENG, ROOM (FORWARD LH DISCRIMINATING
SENSOR JUMPER) HARNESS CONNECTOR
LOCATED NEAR THE DRIVER DASH SIDE.
MEASURE RESISTANCE ON ENG, ROOM HARNESS
CONNECT FROM TERMINAL "1" TO TERMINAL "2".
IS RESISTANCE 5.0!1 OR LESS?
RECONNECT
ENG, ROOM(FORWARD LH DISCRIMINATING GO TO STEP19. GO TO STEP15.
SENSOR
JUMPER) HARNESS CONNECTOR.
DISCONNECT ENG. ROOM(FORWARD RH DISCRIMINATING SENSOR JUMPER) HARNESS CONNECTOR LOCATED BEHIND THE 1/P COMPARTMENT DOOR ASSEMBLY.
MEASURE RESISTANCE ON ENG.ROOM HARNESS
CONNECTOR FROM
TERMINAL "1" TO TERMINAL "2".
IS RESISTANCE 5.0!1 OR LESS?
REPLACE SRS HARNESS. GO TO STEP20.
REPLACE FORWARD LH DISCRIMINATING SENSOR. GO
TO STEP20.
REPLACE FORWARD RH DISCRIMINATING SENSOR. GO
TO STEP20.
REPLACE ENG.ROOM(FORWARD LH DISCRIMINATING GO
TO STEP20.
SENSOR JUMPER) HARNESS.
REPLACE ENG.ROOM(FORWARD RH DISCRIMINATING GO
TO STEP20.
SENSOR JUMPER) HARNESS.
RECONNECT
ALL SRS COMPONENTS, ENSURE ALL GO TO THE "SRS DIAGNOSTIC SYSTEM
COMPONENTS
ARE PROPERLY MOUNTED. CHECK".
CLEAR SRS DIAGNOSTIC TROUBLE CODE. REPEAT THE "SRS DIAGNOSTIC SYSTEM CHECK."

9J-64 Supplemental Restraint System

DTC 24 {PAGE 3 OF 3) \
INITIATOR CIRCUIT VOLTAGE LOW
CIRCUIT DESCRIPTION
During normal, non-deployment operation of the SRS,
a small amount of current flows through both the driver
and passenger deployment loops. The diagnostic
resistors within the dual pole arming sensor and the
discriminating sensors along with the resistance of the
inflator modules cause voltage drops within the
deployment loops. The DERM monitors the voltage at
"Driver Side Low" terminal "88" and "Passenger Side
Low"
terminal "87" to detect shorts or opens within the
driver deployment loop. When the measured voltage at
terminal
"88" or "87" is below a specified percentage of
its respective Driver 36 VLR for
500 milliseconds DTC 24
is set.
DTC WILL SET WHEN
The voltage measured at "Driver Side Low'' terminal "88"
is below a specified percentage of "Driver 36 VLR" or
when the voltage measured at "Passenger
Side Low"
terminal "87" is below a specified percentage of
"Passenger 36 VLR" for 500 milliseconds. This test is run
during the "Continuous Monitoring" test.
ACTION TAKEN
DERM turns "ON" the "AIR BAG" warning lamp and sets
a diagnostic trouble code.
DTC WILL CLEAR WHEN
The voltage measured at "Driver Side Low" terminal "88"
is within a specified percentage of "Driver 36 VLR" and
the voltage measured at "Passenger
Side Low" terminal
"87" is within a specified percentage of "Passenger 36
VLR" for 500 milliseconds.
DTC CHART TEST DESCRIPTION
Number(s) below refer to step number(s) on the
diagnostic chart.
22. This test determines whether the malfunction is a
short from the high side of the passenger
deployment loop to ground. ·
23This test determines whether the malfunction is a
short from the high side of the Driver deployment
loop to ground.
24. This test checks for an open in the driver deployment
loop diagnostic resistor
of the dual pole arming
sensor.
25. This
test checks for an open in the passenger
deployment for an open in the passenger
deployment loop diagnostic resistor of the dual pole
arming sensor.
26. This test checks for high resistance in the "Driver 36
VLR" circuit.
27.
This test checks for high resistance in the
"Passenger 36 VLR" circuit.
28.
This test checks for high side of the driver
deployment loop.
29. This test checks for
an open in the high side of the
passenger deployment loop.
DIAGNOSTIC AIDS
Refer to DTC 24(Page 1 of 3).

STEP
21
22
23
24
25
26
27
28 29
30
31
32
Supplemental ,Restraint System 9J-65
DTC 24 {PAGE 3 OF 3)
INITIATOR CIRCUIT VOLTAGE LOW
ACTION YES NO
WERE YOU
SENT HERE FROM DTC 24(PAGE 2 OF 3)? GO TO STEP22. GO TO DTC
24(PAGE2 OF 3).
DISCONNECT DUAL POLE ARMING SENSOR. GO TO STEP23. GO TO STEP30.
MEASURE RESISTANCE ON DERM HARNESS CONNECTOR
FROM TERMINAL "A7'' TO TERMINAL "A1"(GROUND). DOES J-39200 DISPLAY "OL"(INFINITE)?
MEASURE RESISTANCE ON DERM HARNESS CONNECTOR GO TO STEP24. GO TO STEP30.
FROM TERMINAL "89"
TO TERMINAL "A1"(GROUND). DOES J-39200 DISPLAY "OL"(INFINITE)?
CHECK FOR
PROPER CONNECTION TO THE DUAL POLE GO TO STEP31. GO TO STEP25.
ARMING SENSOR AT TERMINAL "1", "2", "3", "4" AND "5".
IF OK THEN MEASURE RESISTANCE ON DUAL POLE
ARMING SENSOR CONNECTOR FROM TERMINAL "2" TO
TERMINAL "6".
IS RESISTANCE
GREATER THAN 12.9KO?
MEASURE RESISTANCE ON DUAL POLE ARMING SENSOR GO TO STEP31. GO TO STEP26.
CONNECTOR FROM TERMINAL "1" TO TERMINAL "7". IS RESISTANCE GREATER THAN 12.9KO?
MEASURE RESISTANCE ON DUAL POLE ARMING SENSOR
GO TO STEP27. GO TO STEP30.
CONNECTOR FROM TERMINAL "4" TO
DERM HARNESS
CONNECTOR TERMINAL "A4" IS RESISTANCE 5.00 OR
LESS?
MEASURE RESISTANCE ON DUAL POLE ARMING SENSOR GO TO STEP28. GO TO STEP30.
CONNECTOR FROM TERMINAL "5" TO
DERM HARNESS
CONNECTOR TERMINAL "A3" IS RESISTANCE 5.00 OR
LESS?
MEASURE RESISTANCE ON DUAL POLE ARMING SENSOR GO TO STEP29. GO TO STEP30.
CONNECTOR FROM TERMINAL "2" TO
DERM HARNESS
CONNECTOR TERMINAL "89" IS RESISTANCE 5.00 OR
LESS?
MEASURE RESISTANCE ON DUAL POLE ARMING SENSOR GO TO CHART A. GO TO STEP30.
CONNECTOR FROM TERMINAL "7'' TO DERM HARNESS
CONNECTOR TERMINAL "A7" IS RESISTANCE 5.00 OR
LESS?
REPLACE SRS HARNESS. GOTO STEP32
REPLACE DUAL POLE ARMING SENSOR. GOTO STEP 32
RECONNECT ALL SRS COMPONENTS, ENSURE ALL GO TO THE "SRS DIAGNOSTIC SYSTEM
COMPONENTS
ARE PROPERLY MOUNTED. CHECK". CLEAR SRS DIAGNOSTIC TROUBLE CODES. REPEAT THE "SRS DIAGNOSTIC SYSTEM CHECK."

9J-66 Supplemental Restr.aint System
DTC 25 (PAGE 1 OF 2)
INITIATOR CIRCUIT SHORT TO IGNITION
CIRCUIT DESCRIPTION
During the "Initiator Assembly Resistance Test" the
DERM grounds the
"Driver Side Low" terminal "BB" and
measures the voltage at "Driver Side Low" and
"Passenger Side Low." The DERM then grounds
"Passenger Side Low" terminal "B7" and again measures
the
voltage at "Driver Side Low" and "Passenger Side
Low."
For a properly operating circuit the voltage
measures the voltage measurements during each of
these tests
will be below a specified value. When the
voltages measured at both "Driver Side Low" and
"Passenger
Side Low'' are above a specified value during
both tests
DTC 25 is set.
DTC WILL SET WHEN
The voltages measured at both "Driver Side Low" and
"Passenger
Side Low" are above a specified value while
the DERM attempts to ground each of these terminals.
This test is run during the
"Initiator Assembly Resistance
Test" and the "1 0 Minute Loop Test" when: 1) "higher
priority
faults" are detected during ''Turn-ON", 2) No
"higher priority
faults" are detected during "continuous
Monitoring" for one second, 3) No
"Crank" signal present,
4)
"Ignition 1" voltage is above a specified value.
ACTION TAKEN
DERM turns "ON" the "AIR BAG" warning lamp and sets
a diagnostic
trouble code.
DTC WILL CLEAR WHEN
The voltages measured at either "Driver Side Low" or
"Passenger
Side Low" is below a specified value while
the DERM ground either of these terminals.
DTC CHART TEST DESCRIPTION
Number(s) below refer to step number(s) on the
diagnostic chart.
2. This test determines whether the malfunction is
occurring
in the steering column circuitry.
3. This test determines whether the malfunction is
occurring
in the passenger inflator module circuitry.
4. This test for a short from the SRS COIL to +B.
DIAGNOSTIC AIDS
Refer to DTC 25(Page 2 of 2).
IGNmON 1 IGNITION 1 DRIVER SOURCE SENSE
~ -
DRIVER 38VLR PASS. 38VLR PASS. SOURCE SENSE 1DA 1&14 111011 D
REDUNDAT INDICATOR GROUND
PASS SIDE HIGH
PASS SIDE LOW
SPARE/l.PS DRIVER SEAT BelT
SERIAL DATA
SRS INDICATOR