Infiniti Q45. Manual — part 486
DTC P1564 ICC STEERING SWITCH
EC-583
C
D
E
F
G
H
I
J
K
L
M
A
EC
2.
CHECK ICC STEERING SWITCH CIRCUIT
With CONSULT-II
1.
Turn ignition switch ON.
2.
Select “MAIN SW”, “RESUME/ACC SW”, “SET SW”, “DIST SW”
and “CANCEL SW” in “DATA MONITOR” mode with CONSULT-
II.
3.
Check each item indication under the following conditions.
Without CONSULT-II
1.
Turn ignition switch ON.
2.
Check voltage between ECM terminal 99 and ground with press-
ing each button.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 3.
Switch
Monitor item
Condition
Indication
MAIN switch
MAIN SW
Pressed
ON
Released
OFF
CANCEL switch
CANCEL SW
Pressed
ON
Released
OFF
RESUME/ACCEL-
ERATE switch
RESUME/ACC SW
Pressed
ON
Released
OFF
SET/COAST switch
SET SW
Pressed
ON
Released
OFF
DISTANCE switch
DIST SW
Pressed
ON
Released
OFF
MBIB0064E
Switch
Condition
Voltage [V]
MAIN switch
Pressed
Approx. 0
Released
Approx. 4.3
CANCEL switch
Pressed
Approx. 1.3
Released
Approx. 4.3
RESUME/ACCELER-
ATE switch
Pressed
Approx. 3.7
Released
Approx. 4.3
SET/COAST switch
Pressed
Approx. 3.0
Released
Approx. 4.3
DISTANCE switch
Pressed
Approx. 2.2
Released
Approx. 4.3
PBIB0311E
EC-584
DTC P1564 ICC STEERING SWITCH
3.
CHECK ICC STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Disconnect ICC steering switch harness connector.
4.
Check harness continuity between ICC steering switch terminal 2 and ECM terminal 67.
Refer to Wiring Diagram.
5.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M135, F105
●
Combination switch (spiral cable)
●
Harness for open and short between ECM and ICC steering switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK ICC STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check harness continuity between ECM terminal 99 and ICC steering switch terminal 1.
Refer to Wiring Diagram.
2.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M135, F105
●
Combination switch (spiral cable)
●
Harness for open and short between ECM and ICC steering switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK ICC STEERING SWITCH
Refer to
EC-585, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> Replace ICC steering switch.
8.
CHECK INTERMITTENT INCIDENT
Refer to
EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Continuity should exist.
Continuity should exist.
DTC P1564 ICC STEERING SWITCH
EC-585
C
D
E
F
G
H
I
J
K
L
M
A
EC
Component Inspection
NBS00241
ICC STEERING SWITCH
1.
Disconnect ICC steering switch.
2.
Check continuity between ICC steering switch terminals 1 and 2
with pushing each switch.
If NG, replace ICC steering switch.
Switch
Condition
Resistance [
Ω
]
MAIN switch
Pressed
Approx. 0
Released
Approx. 5,500
CANCEL switch
Pressed
Approx. 310
Released
Approx. 5,500
RESUME/ACCELERATE
switch
Pressed
Approx. 2,600
Released
Approx. 5,500
SET/COAST switch
Pressed
Approx. 1,400
Released
Approx. 5,500
DISTANCE switch
Pressed
Approx. 740
Released
Approx. 5,500
SEC008D
EC-586
DTC P1564 ASCD STEERING SWITCH
DTC P1564 ASCD STEERING SWITCH
PFP:25551
Component Description
NBS00242
ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.
Refer to
EC-29, "AUTOMATIC SPEED CONTROL DEVICE (ASCD)"
for the ASCD function.
CONSULT-II Reference Value in Data Monitor Mode
NBS00243
Specification data are reference values.
On Board Diagnosis Logic
NBS00244
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to
PBIB2434E
MONITOR ITEM
CONDITION
SPECIFICATION
MAIN SW
●
Ignition switch: ON
MAIN switch: Pressed
ON
MAIN switch: Released
OFF
CANCEL SW
●
Ignition switch: ON
CANCEL switch: Pressed
ON
CANCEL switch: Released
OFF
RESUME/ACC SW
●
Ignition switch: ON
RESUME/ACCELERATE switch:
Pressed
ON
RESUME/ACCELERATE switch:
Released
OFF
SET SW
●
Ignition switch: ON
SET/COAST switch: Pressed
ON
SET/COAST switch: Released
OFF
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
P1564
1564
ASCD steering
switch
●
An excessively high voltage signal from the ASCD
steering switch is sent to ECM.
●
ECM detects that input signal from the ASCD
steering switch is out of the specified range.
●
ECM detects that the ASCD steering switch is
stuck ON.
●
Harness or connectors
(The switch circuit is open or shorted.)
●
ASCD steering switch
●
ECM
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