cruise control ISUZU TROOPER 1995 Repair Manual

98-12 CRUISE CONTROL
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• IS THE CONTINUITY IN THE CRUISE CONTROL .I REPAIR A POOR CONNECTION OF THE CONNECTORS MAIN SWITCH NORMAL? OR AN OPEN CIRCUIT BETWEEN THE FUSE C-4 (10Al
AND B[E[].
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• REMOVE THE CRUISE MAIN RELAY. REPAIR OR REPLACE THE SWITCH.j
• IS THE RELAY NORMAL?
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• IS THERE ANY BATTERY VOLTAGE APPLIED
REPAIR OR REPLACE THE RELAY. I BETWEEN THE CRUISE MAIN RELAY HARNESS
SIDE CONNECTOR 2IX-20I AND GROUND?
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• REINSTALL THE CRUISE CONTROL MAIN SWITCH. REPAIR A POOR CONNECTION OF THE CONNECTORS
• IS THERE ANY BATTERY VOLTAGE APPLIED OR AN OPEN CIRCUIT BETWEEN THE FUSE C-4 (10AI
BETWEEN 1IX-20I AND THE GROUND? AND 2IX-20 I.
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• IS THERE CONTINUITY BETWEEN THE HARNESS
REPAIR A POOR CONNECTION OF CONNECTORS OR SIDE CONNECTORS 4IX-20 I AND 7 [§)? AN OPEN CIRCUIT BETWEEN 9[ill 16[W I AND 1IX-20I
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CONTINUED FROM PREVIOUS PAGE
• IS THE CONTINUITY OF THE BRAKE SWITCH
NORMAL?
•
IS THERE CONTINUITY BETWEEN THE HARNESS
SIDE CONNECTORS 3IB-13I AND BIB-917
REPAIR
A POOR CONNECTION OF THE CONNECTORS OR AN OPEN CIRCUIT BETWEEN
2IB-13I AND 4IX-20I.
CRUISE CONTROL 98 -13
REPAIR A POOR CONNECTION OF THE CONNECTORS OR AN OPEN CIRCUIT BETWEEN 4IX-20I AND7[ill.
REPAIR A POOR CONNECTION OF THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 3IB-13I AND Bl B-9 I.

98-14 CRUISE CONTROL
B
• IS THERE ANY BATIERY VOLTAGE APPLIED BETWEEN THE CRUISE CONTROL UNIT HARNESS
SIDE CONNECTOR
TERMINALS 12 ~AND 9 [§]]?
• DISCONNECT THE BRAKE SWITCH CONNECTORS.
• CHECK FOR CONTINUITY BETWEEN THE SWITCH
SIDE CONNECTOR TERMINALS
1 [[ll) AND 4 [[ll).
IS THERE CONTINUITY WHEN THE BRAKE
PEDAL IS PRESSED? (THERE SHOULD BE NO CONTINUITY WHEN THE
BRAKE IS RELEASED)
REPAIR A SHORT BETWEEN THE BRAKE SWITCH
CONNECTOR TERMINALS
21 B-131 AND 41 B-131, OR REPLACE THE SWITCH.
IIIII

-·
• DISCONNECT THE BRAKE SWITCH CONNECTOR. • IS THERE ANY BETTERV VOLTAGE APPLIED
BETWEEN THE SWITCH HARNESS SIDE
CONNECTOR 1 [ill] AND THE GROUND?
• IS THE CONTINUITY OF THE BRAKE SWITCH NORMAL?
• IS THERE CONTINUITY BETWEEN THE HARNESS
SIDE CONNECTOR TERMINALS 51 B-91 AND 91 B-91?
CRUISE CONTROL 98-15
REPAIR A POOR CONNECTION OF THE CONNECTORS OR AN OPEN CIRCUIT BETWEEN THE FUSE C-14 (15Al
AND
1IB-13i.
REPAIR A POOR CONNECTION OF THE
CONNECTORS OR AN OPEN CIRCUIT BETWEEN
4 ~ANDs[[9].

98 -16 CRUISE CONTROL
2. CRUISE SPEED CANNOT BE SET. (CHART 2)
• DISCONNECT THE CONNECTOR OF THE CRUISE
CONTROL SWITCH !COMBINATION SWITCH).
•
TURN THE STARTER SWITCH AND CRUISE CONTROL MAIN SWITCH ON.
• IS THERE ANY BATIERY VOLTAGE APPLIED BETWEEN
THE
CRUISE CONTROL SWITCH HARNESS SIDE
CONNECTOR 9IB-52I AND THE GROUND?
•
CHECK THE FOLLOWING:
@ INSPECTION OF THE PUMP & VSV AND THE
CIRCUIT @ INSPECTION OF THE CRUISE CONTROL SWITCH AND THE CIRCUIT
@ INSPECTION OF THE MODE SWITCH, CANCEL SWITCH !A/Tl CLUTCH SWITCH, CANCEL SWITCH (MIT} AND CIRCUIT @ INSPECTION OF THE VEHICLE SPEED SENSOR AND CIRCUIT @ INSPECTION OF THE GROUND CIRCUIT OF THE
CRUISE CONTROL UNIT. • ARE THE RESULTS OF INSPECTION NORMAL?
IF NO TROUBLE IS FOUND, REPLACE
THE
CRUISE CONTROL UNIT
VSV: VACUUM SWITCHING VALVE CHECK
THE
POWER CIRCUIT AND REPAIR IT IF
NECESSARY.
(REFER TO CHART 1)
•

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?
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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
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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
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• 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?
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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.
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• 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~.