Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual — part 1703
9J1–23
RESTRAINT CONTROL SYSTEM
DTC 15 Passenger Deployment Loop Resistance High
Step
Action
Yes
No
1
Was the “SRS Diagnostic System Check” performed?
Go to
Step 2
Go to
“SRS
Diagnostic
System Check.”
2
1. When measurements are requested in this chart use J–39200
DVM with correct terminal adapter from J–35616–A.
2. Use scan tool data list function, read and record the passenger
deployment loop resistance.
Is passenger resist more than 2.9 ohms?
Go to
Step 3
Go to
Chart A
3
1. Ignition switch “OFF.”
2. Make sure the passenger air bag assembly yellow 2–pin
connector located behind the glove box assembly is seated
properly.
Is the yellow 2–pin connector connected properly?
Go to
Step 4
Seat passenger
air bag assembly
yellow 2–pin
connector
properly.
Go to
Step 7
4
1. Disconnect and inspect the passenger air bag assembly
yellow 2–pin connector located behind the glove box
assembly.
2. If OK, reconnect the passenger air bag assembly 2–pin
connector.
3. Ignition switch “ON.”
Is DTC 15 current?
Go to
Step 5
Ignition switch
“OFF.”
Go to
Step 7
5
1. Ignition switch “OFF.”
2. Disconnect SRS coil and passenger air bag 2–pin connectors
located at the base of the steering column and behind the
glove box assembly.
3. Connect J–41433 SRS driver / passenger load tool and
appropriate adapters to SRS coil and passenger air bag
assembly harness connectors.
4. Ignition switch “ON.”
Is DTC 15 current?
Go to
Step 6
Ignition switch
“OFF.”
Replace the
passenger air
bag assembly.
Go to
Step 7
6
1. Ignition switch “OFF.”
2. There has been an increase in the total circuit resistance of the
passenger inflator deployment loop.
3. Use the high resolution ohmmeter mode of the DVM while
checking CKTs IB07–YEL/GRN and IB08–YEL/RED, and
SDM connector terminal “15” and “16” to locate the root cause.
Was a fault found?
Replace SRS
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
RESTRAINT CONTROL SYSTEM
9J1–24
DTC 16 Passenger Deployment Loop Resistance Low
D09R100002
Circuit Description:
When the ignition switch is turned “ON”, the Sensing and
Diagnostic Module (SDM) will perform tests to diagnose
critical malfunctions within itself. Upon passing these
tests “ignition 1”, and deployment loop voltages are
measured to ensure they are within their respective
normal voltage ranges. The SDM then proceeds with the
“Resistance Measurement Test”. “Passenger Bag Low”
terminal “16” is grounded through a resistor and the
passenger current source connected to “Passenger Bag
High” terminal “15” allows a known amount of current to
flow. By monitoring the voltage difference between
“Passenger Bag High” and “Passenger Bag Low”, the
SDM calculates the combined resistance of the
passenger air bag assembly, harness wiring
Circuits(CKTs) IB07–YELLOW/GREEN and
IB08–YELLOW/RED connector terminal contact.
DTC Will Set When:
The combined resistance of the passenger air bag
assembly, harness wiring CKTs IB07–YELLOW/GREEN
and IB08–YELLOW/RED, and connector terminal
contact is above a specified value. This test is run once
each ignition cycle during the “Resistance Measurement
Test” when:
1. No “higher priority faults” are detected during
“Turn–ON”,
2. “Ignition 1” voltage is in the specified value.
Action Taken:
SDM turns “ON” the “AIR BAG” warning lamp and sets a
diagnostic trouble code.
DTC Will Clear When:
The ignition switch is turned “OFF.”
9J1–25
RESTRAINT CONTROL SYSTEM
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 Sensing and Diagnostic Module (SDM).
3. This test verifies connection of the yellow 2–pin
connector.
4. This test cheeks for proper operation of the shorting
clip in the yellow 2–pin connector.
5. The test checks for a malfunction passenger air bag
assembly.
6. This test determines whether the malfunctioning is
due to shorting in the wiring.
Diagnostic Aids:
An intermittent condition is likely to be caused by a short
between Circuits(CKTs) IB07–YELLOW/GREEN and
IB08–YELLOW/RED, or a malfunctioning shorting clip on
the passenger air bag assembly which would require
replacement of the air bag assembly. The test for this
diagnostic trouble code is only run while “AIR BAG”
warning lamp is performing the bulb check, unless
Diagnostic Trouble Code (DTC) 17 or DTC 26 is detected.
When a scan tool “Clear Codes” command is issued and
the malfunction is still present, the DTC will not reappear
until the next ignition cycle.
RESTRAINT CONTROL SYSTEM
9J1–26
DTC 16 Passenger Deployment Loop Resistance Low
Step
Action
Yes
No
1
Was the “SRS Diagnostic System Check” performed?
Go to
Step 2
Go to
“SRS
Diagnostic
System Check.”
2
1. When measurements are requested in this chart use J–39200
DVM with correct terminal adapter from J–35616–A.
2. Using scan tool data list function, read and record the
passenger deployment loop resistance.
Is passenger resist. less than 1.4 ohms?
Go to
Step 3
Go to
Chart A
3
1. Ignition switch “OFF.”
2. Make sure the passenger air bag assembly yellow 2–pin
connector located behind the glove box assembly is seated
properly.
Is the yellow 2–pin connector connected properly?
Go to
Step 4
Seat passenger
air bag assembly
yellow 2–pin
connector
properly.
Go to
Step 7
4
1. Disconnect and inspect the passenger air bag assembly
yellow 2–pin connector located behind the glove box
assembly.
2. If OK, reconnect the passenger air bag assembly 2–pin
connector.
3. Ignition switch “ON.”
Is DTC 16 current?
Go to
Step 5
Ignition switch
“OFF.”Go to
Step
7
5
1. Ignition switch “OFF.”
2. Disconnect SRS coil and passenger air bag 2–pin connectors
located at the base of the steering column and behind the
glove box assembly.
3. Connect J–41433 SRS driver / passenger load tool and
appropriate adapters to SRS coil and passenger air bag
assembly harness connectors.
4. Ignition switch “ON.”
Is DTC 16 current?
Go to
Step 6
Ignition switch
“OFF.”
Replace the
passenger air
bag assembly.
Go to
Step 7
6
1. Ignition switch “OFF.”
2. There has been a decrease in the total circuit resistance of the
passenger inflator deployment loop.
3. Use the high resolution ohmmeter mode of the DVM while
checking CKTs IB07–YEL/GRN and IB08–YEL/RED, and
SDM connector terminal “15” and “16” to locate the root cause.
Was a fault found?
Replace SRS
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
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