Isuzu Rodeo UE. Manual - part 650

9J1–37

RESTRAINT CONTROL SYSTEM

2. This test verifies proper connection of the yellow

2–pin connector at the base of the steering column.

3. This test checks for proper contact and/or corrosion

of the yellow 2–pin connector at the base of the
steering column.

4. This test isolates the malfunction to one side of the

SRS coil assembly yellow 2–pin connector located
at the base of steering column.

5. This test determines whether the open is in the

wiring.

6. This test determines whether the malfunction is in

the SRS coil assembly or the driver air bag
assembly.

Diagnostic Aids:

An intermittent condition is likely to be caused by a poor
connection at the driver air bag assembly harness 2–pin
connector terminals “1” and “2” at the top of the steering
column, SRS coil assembly harness 2–pin connection
terminals “1” and “2”, SDM terminals “3” and “4”, or an
open in CKTs IB05–YEL and IB06–YEL/BLK.

RESTRAINT CONTROL SYSTEM

9J1–38

DTC 26 Driver Deployment 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 J–39200

DVM with correct terminal adapter from J–35616–A.

2. Use scan tool data list function, read and record the driver

differential voltage.

Is driver differential voltage more than 4.0 volts?

Go to Step 3

Go to Chart A.

3

1. Ignition switch “OFF.”
2. Make sure the SRS coil assembly yellow 2–pin connector

located at the base of steering column is seated properly.

Is the yellow 2–pin connector connected properly?

Go to Step 4

Seat driver air
bag assembly

2–pin connector.

Go to Step 8

4

1. Disconnect and inspect the SRS coil assembly yellow 2–pin

connector located base of steering column.

2. If OK, reconnect the SRS coil assembly yellow 2–pin

connector.

3. Ignition switch “ON”.

Is DTC 26 current?

Go to Step 5

Ignition switch

“OFF.”

Go to Step 8

5

1. Ignition switch “OFF.”
2. Disconnect SRS coil and passenger air bag assembly, yellow

2–pin connectors located at the base of steering column and
behind the glove box assembly.

3. Connect SRS driver / passenger load tool J–41433 and

appropriate adapter to SRS coil and passenger air bag
assembly harness connectors.

4. Ignition switch “ON.”

Is DTC 26 current?

Go to Step 6

Go to Step 7

6

1. Ignition switch “OFF.”
2. There has been an open circuit in the driver deployment loop.

Use the high resolution ohmmeter mode of the DVM while
checking CKTs IB05 YEL and IB06 YEL/BLK, and SDM
connector terminal “3” AND “4” to locate the root cause.

Was a fault found?

Replace SRS

harness.

Go to Step 8

Go to Chart A.

7

1. Ignition switch “OFF.”
2. Disconnect SRS driver / passenger load tool from SRS coil

assembly harness connector.

3. Connect SRS driver / passenger load tool J–41433 on steering

column.

4. Reconnect SRS coil assembly harness connector as the base

of steering column.

5. Ignition switch “ON.”

Is DTC 26 current?

Ignition switch

“OFF.”

Replace SRS coil

assembly, refer to

in this section

9J–3.

Go to Step 8

Ignition switch

“OFF.”

Replace driver air

bag assembly.

Go to Step 8

8

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 8

9J1–39

RESTRAINT CONTROL SYSTEM

DTC 51  Deployment Event Commanded

D09RW002

Circuit Description:

The SDM contains a sensing device which converts
vehicle velocity changes to an electrical signal.  The
electrical signal generated is processed by the SDM and
then compared to a value stored in memory.  When the
generated signal exceeds the stored value, the SDM will
cause current to flow through the air bag assembly
deploying the air bags and causing DTC 51 to set.

DTC Will Set When:

The SDM detects a frontal crash, up to 30 degrees off the
centerline of the vehicle, of sufficient force to warrant
deployment of the air bags.

Action Taken:

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

DTC Will Clear When:

The SDM is replaced.

DTC Chart Test Description:

Number(s) below refer to step number(s) on the
diagnostic chart:
2. If air bag assembly (s) has not deployed, DTC 51

may have falsely set.

3. If DTC 51 has set with no signs of frontal impact, the

diagnostic trouble code has falsely set.

RESTRAINT CONTROL SYSTEM

9J1–40

DTC 51 Deployment Event Commanded 

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.

Step

Action

Yes

No

1

Was the “SRS Diagnostic System Check” performed?

Go to Step 2

Go to the “SRS

Diagnostic

System Check.”

2

Ignition switch “OFF.”

Have air bag assemblies deployed?

Replace

components and

perform

inspections as

directed in

“repairs and

inspections

required after an

accident” in this

section.

Clear diagnostic

trouble codes.

Repeat the “SRS

Diagnostic

System Check.”

Go to Step 3

3

Inspect front of vehicle and undercarriage for signs of impact.

Were signs of impact found?

Replace

components and

perform

inspections as

directed in

“repairs and

inspections

required after an

accident” in this

section.

Clear diagnostic

trouble codes.

Repeat the “SRS

Diagnostic

System Check.”

Ignition switch

“OFF.”

Replace SDM.

Reconnect all

SRS system

components,

ensure all

components are

properly

mounted.Repeat

the “SRS

Diagnostic

System Check.”