I26135
ECM
CCS
22
E6
G–Y
5
CCS
CRUISE
RES/
ACC
SET/
COAST
CANCEL
4
B–R
19
IK2
BR
EB
C16
Cruise Control SW
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM (w/ ETCS–i)
DI–715
977
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
Control Switch Circuit (Cruise Control Switch)
CIRCUIT DESCRIPTION
This circuit Sends the SET/COAST, RES/ACC and CANCEL signals (each voltage) to the ECM.
WIRING DIAGRAM
DIA7W–02
I25145
CCS (+)
E6
DI–716
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM (w/ ETCS–i)
978
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
INSPECTION PROCEDURE
1
Check voltage between terminal CCS of ECM connector and body ground.
PREPARATION:
(a)
Remove the ECM with the connector being connected.
(b)
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals E6–22 (CCS) of the
ECM connector and the body ground when each control switch
is operated.
Switch position
Voltage
Neutral
9 – 14 V
RES/ACC
2.1 – 4.0 V
SET/COAST
4.0 – 7.1 V
CANCEL
6.0 – 10.1 V
NG
Proceed to next circuit inspection shown in
problem symptoms table (See page DI–700).
OK
I26002
RES/ACC
CANCEL
SET/COAST
ON–OFF
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM (w/ ETCS–i)
DI–717
979
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
2
Check control switch.
PREPARATION:
(a)
Remove the steering wheel center pad.
(b)
Disconnect the control switch connector.
CHECK:
(a) Measure the resistance between terminals 4 and 5 of the
control switch connector when the control switch is oper-
ated.
OK:
Switch Position
Resistance
Neutral
∞ (No continuity)
RES/ACC
235 – 245 Ω
SET/COAST
617 – 643 Ω
CANCEL
1509 – 1571 Ω
(b)
Check the continuity between terminals 4 and 5 of the
control switch connector when the main switch is held on
and off.
OK:
Switch Position
Tester connection
Specified condition
OFF
–
No continuity
ON
4 – 5
Continuity
NG
Replace control switch.
OK
3
Check harness and connector between ECM and cruise control switch, and
cruise control switch and body ground (See page IN–28).
NG
Repair or replace harness or connector.
OK
DI–718
–
DIAGNOSTICS
CRUISE CONTROL SYSTEM (w/ ETCS–i)
980