More Than One Shift Select Button Remains Lit. Isuzu S/T Isuzu

For 1990-2009 cars only

Makes 🢒 Isuzu 🢒 1999 🢒 S/T Isuzu - 4WD 🢒 Driveline/Axle 🢒 Transfer Case - NVG 233-NP1 (Two Speed Selectable) 🢒 More Than One Shift Select Button Remains Lit

Step	Action	Value(s)	Yes	No
1	Were you sent here from a diagnostic table?	Go to Step 2	Refer to Electric Shift Transfer Case Functional Test
2	If 2H1 remains lit, check for a ground in CKT 1563 between pin C on the shift select switch and pin C11 on the TCCM. If 4H1 remains lit, check for a ground in CKT 1566 between pin F on the shift select switch and pin C12 on the TCCM. If 4L0 remains lit, check for a ground in CKT 1565 between pin E on the shift select switch and pin C14 on the TCCM. Is the checked CKT grounded?	Go to Step 3	Refer to Perform a Diagnostic On the TCCM
3	Ensure the ignition switch is positioned to OFF. Repair the ground in the CKT. Is the repair completed?	Refer to Electric Shift Transfer Case Functional Test	--

Step

Action

Value(s)

Yes

Were you sent here from a diagnostic table?

Go to Step 2

Refer to Electric Shift Transfer Case Functional Test

If 2H1 remains lit, check for a ground in CKT 1563 between pin C on the shift select switch and pin C11 on the TCCM.
If 4H1 remains lit, check for a ground in CKT 1566 between pin F on the shift select switch and pin C12 on the TCCM.
If 4L0 remains lit, check for a ground in CKT 1565 between pin E on the shift select switch and pin C14 on the TCCM.

Is the checked CKT grounded?

Go to Step 3

Refer to Perform a Diagnostic On the TCCM

Ensure the ignition switch is positioned to OFF.
Repair the ground in the CKT.

Is the repair completed?

Refer to Electric Shift Transfer Case Functional Test