ISUZU TROOPER 1995 Workshop Manual

CRUISE CONTROL 98-17
@ INSPECTION OF THE PUMP & VSV, AND THE CIRCUIT
• DOES THE ACTUATOR CABLE FUNCTION
CORRECTLY?
• DISCONNECT
THE CONNECTOR OF THE PUMP & vsv.
• WITH THE PUMP & ACTUATOR SIDE CONNECTOR 2IC-37ICONNECTED TO THE BATIERY (+)
TERMINAL AND THE CONNECTOR 31 C-371 TO
GROUND,
IS THE OPERATING SOUND OF THE VACUUM PUMP HEARD?
• DISCONNECT THE VACUUM HOSE FROM THE
ACTUATOR.
• CONNECT 21 C-371 TO THE BATIERY (+)TERMINAL,
AND 31 C-371, 11 C-371 AND 41 C-371 TO GROUND. • IS THERE ANY NEGATIVE PRESSURE APPLIED TO THE VACUUM HOSE?
• CONNECT
THE VACUUM HOSE TO THE
ACTUATOR.
• CONNECT 2 [E;ll) TO THE BATIERY (+)TERMINAL,
AND 31 C-371, 11 C-371 AND 41 C-371 TO THE
GROUND.
• DOES THE ENGINE THROTILE OPERATE
CORRECTLY?
CONTINUED ON FOLLOWING
PAGE

98 -18 CRUISE CONTROL
• DOES THE SPEEDOMETER DISPLAY A CORRECT I INDICATION?
l
I YES I l NO I
I
• IS THE ACTUATOR CABLE NORMAL? I l REPAIR OR REPLACE THE SPEEDOMETER. I
I YES I
$
CHECK THE PUMP & VSV AND THE CIRCUIT J I REFER TO CHART 2@) I REPAIR OR REPLACE THE ACTUATOR CABLE. J

CRUISE CONTROL 98-19
@ INSPECTION OF THE CRUISE CONTROL SW AND THE CIRCUIT
I • DISCONNECT THE CONNECTOR OF THE CRUISE
CONTROL SWITCH.
• IS CONTINUITY
BETWEEN THE SWITCH TERMINALS 9IB-52IAND 10 IB-521 NORMAL?
a) WHEN THE SET SWITCH ON .......... CONTINUITY
b) WHEN THE SET SWITCH OFF .......... NO CONTINUITY
lv~
$
• DISCONNECT THE CONNECTOR OF THE CRUISE
REPAIR OR REPLACE THE SWITCH. 1 CONTROL UNIT.
• IS THERE CONTINUITY BETWEEN THE HARNESS SIDE CONNECTOR TERMINALS 10 IB-521 AND 61 B-91?
~ $
NO TROUBLE IS FOUND.) REPAIR A POOR CONNECTION OF THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 10 IB-521 AND 61 B-9 I

98-20 CRUISE CONTROL
@ INSPECTION OF THE MODE SWITCH, CANCEL SWITCH (A/T), CLUTCH
SWITCH
(M/T) AND THE CIRCUIT
• IS THE FUSE C-3 IA/TI OR C-4 IMfTI NORMAL?
• DISCONNECT THE CONNECTOR OF THE MODE SW (CLUTCH SWITCH).
• IS THERE BATTERY VOLTAGE APPLIED
BETWEEN THE HARNESS SIDE CONNECTOR SIC-431 121 B-1611 AND THE GROUND WHEN STARTER SWITCH IS ON?
• IS THE CONTINUITY IN THE MODE SWITCH !CLUTCH SW) NORMAL?
•
DISCONNECT THE CONNECTOR OF THE CANCEL SWITCH.
• WHEN IN THE FOLLOWING CONDITIONS, IS THERE BATTERY VOLTAGE APPLIED BETWEEN THE
SWITCH HARNESS SIDE CONNECTOR 121 B-521 AND THE GROUND?
(A/T): WHEN THE MODE SWITCH IS EITHER AT "D",
"3", "2" OR "L" POSITION. (MfTI: WHEN THE CLUTCH PEDAL RELEASED.
CONTINUED ON FOLLOWING PAGE
REPAIR A POOR CONNECTION OF THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN THE FUSE C-3 I 15A) AND 51 C-431, OR THE FUSE C-4 (10AI AND 21 B-161.
..

CONTINUED FROM PREVIOUS PAGE
• IS THE CONTINUITY IN THE CANCEL SWITCH
!COMBINATION SWI NORMAL?
•
IS THERE CONTINUITY BETWEEN THE HARNESS
SIDE CONNECTOR TERMINALS
13~AND 4~?
CRUISE CONTROL 98-21
REPAIR A POOR CONNECTION OF THE CONNECTORS OR AN OPEN CIRCUIT BETWEEN THE HARNESS SIDE
CONNECTOR TERMINALS
sl C-431 AND 121 B-521 !11 B-161 AND 121 B-521 ).
REPAIR A POOR CONNECTION OF THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 131 B-521 AND 4~.

98 -22 CRUISE CONTROL
@ INSPECTION OF THE VEHICLE SPEED SENSOR AND THE CIRCUIT
• IS THE VEHICLE SPEED SENSOR NORMAL?
•
IS THERE CONTINUITY BETWEEN THE HARNESS SIDE CONNECTOR TERMINALS 131 B-9IAND
7[8]]?
• IS THERE CONTINUITY BETWEEN THE HARNESS SIDE CONNECTOR TERMINALS 4(m AND 4IC-39I?
REPAIR A POOR CONNECTION OF THE CONNECTORS OR AN OPEN CIRCUIT IN THE CIRCUIT.
REPAIR
A POOR CONNECTION OF THE CONNECTORS OR AN OPEN CIRCUIT IN THE CIRCUIT.

CRUISE CONTROL 98-23
@ INSPECTION OF THE GROUND CIRCUIT OF CRUISE CONTROL UNIT
• lSI B-2IGROUNDED SECURELY?
• DISCONNECT THE CONNECTOR OF THE CRUISE CONTROL UNIT.
•
IS THERE CONTINUITY BETWEEN THE CONTROLLER HARNESS SIDE CONNECTOR 9[H)AND THE
GROUNDIB-21?
REPAIR A POOR CONNECTION OF THE CONNECTORS OR AN OPEN CIRCUIT IN THE CIRCUIT.

98-24 CRUISE CONTROL
3. RESUME FUNCTION DOES NOT OPERATE (CHART 3)
• DISCONNECT THE CONNECTOR OF THE CRUISE CONTROL SWITCH !COMBINATION SW).
• TURN THE STARTER SWITCH AND THE CRUISE
CONTROL MAIN SWITCH ON. • IS THERE ANY BATIERY VOLTAGE APPLIED
BETWEEN THE CRUISE CONTROL SWITCH HARNESS SIDE CONNECTOR 9IB-52IAND THE
GROUND?
~ $
• IS CONTINUITY BETWEEN THE SWITCH SIDE CHECK THE POWER CIRCUIT FOR ANY TROUBLE.
CONNECTOR TERMINALS 91 B-521 AND 111 B-521 (REFER TO CHART 1)
NORMAL?
a) WHEN THE RESUME SW ON .......... CONTINUITY
b) WHEN THE RESUME SW OFF .......... NO CONTINUITY
I
$ $
• IS THERE CONTINUITY BETWEEN THE HARNESS REPAIR OR REPLACE THE SWITCH. I SIDE CONNECTOR TERMINALS 111 B-521 AND 111 B-91?
$ $
REPLACE THE CRUISE CONTROL UNIT./ REPAIR A POOR CONNECTION OF THE CONNECTORS OR AN OPEN CIRCUIT BETWEEN 111 B-521 AND 111 B-91

CRUISE CONTROL 98-25
4. ACCELERATOR OR COAST (TAP-UP OR TAP-DOWN)
FUNCTION DOES NOT OPERATE (CHART 4)
• DOES THE CRUISE CONTROL SWITCH FUNCTION
CORRECTLY? (REFER TO CHARTS 2 AND 3.1

...... f-. r:
98-26 CRUISE CONTROL
5. CRUISE SPEED IS UNSTABLE (CHART 5)
• DOES THE SPEEDOMETER DISPLAY A CORRECT INDICATION?
CHECK THE PUMP & VSV AND THE CIRCUIT. (REFER TO CHART 2-@ )
..