Isuzu 1999 RODEO Workshop Manual page 1914

Diagnostic Aids
f Refer to the accompanying chart for the normal range
signals and the illegal combinations.
f Inspect the wiring for poor electrical connections at
the PCM and at the transmission 8–way connector.
Look for possible bent, backed out, deformed or
damaged terminals. Check for weak terminal tension
as well. Also check for a chafed wire that could short
to bare metal or other wiring. Inspect for a broken wire
inside the insulation.
f When diagnosing for a possible intermittent short or
open condition, move the wiring harness while
observing test equipment for a change.
f Refer to the "Range Switch Logic Table" or
"Functional Test Procedure" for further information.
Test Description
The numbers below refer to the step numbers on the
diagnostic chart:
3. This test checks the indicated range signal to the
manual valve actually selected.
6. This test checks for continuity between each
selected range switch connector terminals.
Range Switch Logic Table
Range Switch Pin
Range g
Position
A
Park ON
Reverse ON
Neutral OFF
D4 OFF
D3 ON
2 ON
L OFF
Illegal OFF
Illegal OFF
TRANSMISSION CONTROL SYSTEM (4L30–E)
B C P(G)
OFF OFF ON
ON OFF OFF
ON OFF ON
ON ON OFF
ON ON ON
OFF ON OFF
OFF ON ON
OFF OFF OFF
OFF OFF ON
7A1–35