Page 1825 of 2000

CC–26CRUISE CONTROL – CRUISE CONTROL SYSTEM
CC
(a) Remove the stop light switch.
(b) Measure the resistance of the switch.
Standard resistance
NG
OK
(a) Disconnect the A3 switch connector.
(b) Measure the voltage of the wire harness side connector.
Standard voltage
NG
OK
(a) Disconnect the A9 ECM connector.
(b) Turn the ignition switch ON.
(c) Measure the voltage of the wire harness side connector.
Standard voltage
NG
4INSPECT STOP LIGHT SWITCH
I013683E14
Tester Connection Switch Condition Specified Condition
1 - 2 Not pushed Below 1
3 - 4 Pushed
1 - 2 Pushed 10 k
or higher
3 - 4 Not pushed
REPLACE STOP LIGHT SWITCH
5CHECK WIRE HARNESS (SWITCH - BATTERY)
E110511E05
Tester Connection Switch Condition Specified Condition
A3-3 - Body ground Always 10 to 14 V
A3-2 - Body ground Ignition switch ON
REPAIR OR REPLACE HARNESS AND
CONNECTOR
6CHECK WIRE HARNESS (ECM - BATTERY)
E124667E01
Tester Connection Switch Condition Specified Condition
A9-35 (STP) - Body
ground Depressed 10 to 14 V
A9-36 (ST1-) - Body
ground Released
A9-35 (STP) - Body
ground Released Below 1 V
A9-36 (ST1-) - Body
ground Depressed
REPAIR OR REPLACE HARNESS AND
CONNECTOR
Page 1826 of 2000
CRUISE CONTROL – CRUISE CONTROL SYSTEMCC–27
CC
OK
REPLACE ECM
Page 1827 of 2000
CC–28CRUISE CONTROL – CRUISE CONTROL SYSTEM
CC
DESCRIPTION
This DTC expresses the internal abnormalities of the ECM.
INSPECTION PROCEDURE
(a) Clear the DTC (see page CC-15).
(b) Check for DTC (see page CC-15).
OK:
DTC is not output.
NG
OK
DTC P0607/54 Input Signal Circuit Abnormal
DTC No. DTC Detection Condition Trouble Area
P0607/54 When either of following conditions is met:
• Cruise control input signal abnormal
• Stop light switch input signal abnormalECM
1CHECK FOR DTC
REPLACE ECM
END
Page 1828 of 2000
CRUISE CONTROL – CRUISE CONTROL SYSTEMCC–29
CC
DESCRIPTION
This DTC is output when the VSC system has a problem. Check the VSC system when this DTC is
output.
INSPECTION PROCEDURE
HINT:
This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication
circuit, one or more DTCs in the CAN communication system are output.
Refer to HOW TO PROCEED WITH TROUBLESHOOTING
(see page BC-20).
DTC P1578/69 Brake System Malfunction
DTC No. DTC Detection Condition Trouble Area
P1578/69 ECM receives a brake system error signal for
0.2 seconds or more while cruise control is in
operationVSC system
1CHECK BRAKE SYSTEM
Page 1829 of 2000

CC–30CRUISE CONTROL – CRUISE CONTROL SYSTEM
CC
DESCRIPTION
The skid control ECU sends signals such as cruise control cancel demand signals and brake operation
demand from ECM response signals to the ECM when the cruise control system is in operation.
INSPECTION PROCEDURE
HINT:
This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication
circuit, one or more DTCs in the CAN communication system are output.
Refer to HOW TO PROCEED WITH TROUBLESHOOTING
(see page CA-8).
DTC P1630/64Communication Error from Skid Control ECU to
ECM
DTC U0122/82 Communication Stop from VSC to ECM
DTC No. DTC Detection Condition Trouble Area
P1630/64 While cruise control is either preparing for
operation or operating, if communication data
from skid control ECU is logically inconsistent
for a certain amount of time, ECM records this
logical error code• Communication circuit
• Skid control ECU
•ECM
U0122/82 While cruise control is either preparing for
operation or operating, if communication data
from skid control ECU is invalid for a certain
amount of time, ECM records communication
cut off code• Communication circuit
• Skid control ECU
•ECM
1CHECK CAN COMMUNICATION SYSTEM
Page 1830 of 2000

CRUISE CONTROL – CRUISE CONTROL SYSTEMCC–31
CC
DESCRIPTION
Therefore, if the skid control ECU detects a communication error from the ECM, it sends a malfunction
signal back to the ECM.
INSPECTION PROCEDURE
HINT:
This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication
circuit, one or more DTCs in the CAN communication system are output.
Refer to HOW TO PROCEED WITH TROUBLESHOOTING
(see page CA-8).
DTC P1631/65Communication Error from ECM to Skid Con-
trol ECU
DTC U0100/78Communication Stop from ECM to Distance
Control ECU, VSC
DTC No. DTC Detection Condition Trouble Area
P1631/65 While the cruise control is either preparing for
operation or operating, if the ECM
continuously receives a logical error signal
from the skid control ECU for a certain
amount of time, the ECM records this logical
error code• Communication circuit
•ECM
• Skid control ECU
U0100/78 While the cruise control is either preparing for
operation or operating, if the ECM
continuously receives a communication cut off
signal from the skid control ECU for a certain
amount of time, the ECM records this
communication cut off code• Communication circuit
•ECM
• Skid control ECU
1CHECK CAN COMMUNICATION SYSTEM
Page 1831 of 2000
CC–32CRUISE CONTROL – CRUISE CONTROL SYSTEM
CC
DESCRIPTION
This circuit sends signals to the ECM depending on the cruise control switch condition. The battery
supplies positive (+) battery voltage to the cruise control switch. Then terminal CCS of the ECM receives
the voltage according to the switch condition.
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Check the DATA LIST for proper functioning of the cruise
control switch.
ECM
Cruise Control Switch Circuit
1READ VALUE OF INTELLIGENT TESTER (CRUISE CONTROL MAIN SWITCH)
E124659E01
Item Measurement Item / Display
(Range) Normal Condition Diagnostic Note
MAIN SW (MAIN) Main switch (Main CPU) / ON or
OFF ON: Main switch (Main CPU) is
ON
OFF: Main switch (Main CPU) is
OFF -
CANCEL SW CANCEL switch / ON or OFF ON: CANCEL switch is ON
OFF: CANCEL switch is OFF -
SET/COAST SW - / SET switch / ON or OFF ON: - / SET switch is ON
OFF: - / SET switch is OFF -
Page 1832 of 2000
CRUISE CONTROL – CRUISE CONTROL SYSTEMCC–33
CC
OK:
When cruise control switch operation is
performed, the results will be same as above.
OK
NG
(a) Disconnect the cruise control switch connector.
(b) Measure the resistance of the switch.
Standard resistance
NG
OK
RES/ACC SW + / RES switch / ON or OFF ON: + / RES switch is ON
OFF: + / RES switch is OFF - Item Measurement Item / Display
(Range) Normal Condition Diagnostic Note
PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
2INSPECT CRUISE CONTROL SWITCH
E124663E01
Tester Connection Switch Condition Specified Condition
3 - 4 cruise control switch
ON10 k
or higher
cruise control switch
OFFBelow 1
+/RES 216 to 264
-/SET 567 to 693
CANCEL 1,386 to 1,694
REPLACE CRUISE CONTROL MAIN SWITCH