Nissan Maxima Service and Repair Manual: P1564 ASCD steering switch
Description
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-68, "System Diagram" for the ASCD function.
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis
for DTC P0605. Refer to
EC-391, "DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform
the following before conducting
the next test.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
2.PERFORM DTC CONFIRMATION PROCEDURE
- Turn ignition switch ON and wait at least 10 seconds.
- Press MAIN switch for at least 10 seconds, then release it and
wait at least 10 seconds.
- Press CANCEL switch for at least 10 seconds, then release it and
wait at least 10 seconds.
- Press RESUME/ACCELERATE switch for at least 10 seconds, then
release it and wait at least 10 seconds.
- Press SET/COAST switch for at least 10 seconds, then release it
and wait at least 10 seconds.
- Check DTC.
Diagnosis Procedure
1.CHECK GROUND CONNECTION
- Turn ignition switch OFF.
- Check ground connection E9.
2.CHECK ASCD STEERING SWITCH CIRCUIT
With CONSULT
- Turn ignition switch ON.
- Select "MAIN SW", "CANCEL SW", "RESUME/ACC SW" and "SET SW" in
"DATA MONITOR" mode with
CONSULT.
- Check each item indication under the following conditions
Without CONSULT
- Turn ignition switch ON.
- Check the voltage between ECM harness connector terminals
under the following conditions.
3.CHECK ASCD STEERING SWITCH GROUND CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Disconnect combination switch harness connector.
- Check the continuity between combination switch and ECM harness
connector.
- Also check harness for short to ground and short to power.
4.DETECT MALFUNCTIONING PART
- Check the following. Harness connectors E30, M11
- Combination switch (spiral cable)
- Harness for open and short between ECM and combination switch
5.CHECK ASCD STEERING SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Check the continuity between combination switch and ECM harness
connector.
- Also check harness for short to ground and short to power
6.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E30, M1
- Combination switch (spiral cable)
- Harness for open and short between ECM and combination switch
7.CHECK ASCD STEERING SWITCH
8.CHECK INTERMITTENT INCIDENT
Component Inspection
1.CHECK ASCD STEERING SWITCH
- Turn ignition switch OFF.
- Disconnect combination switch (spiral cable) harness connector.
- Check resistance between combination switch harness connector
terminals as per the following.
Description
The power generation voltage variable control enables fuel consumption to be
decreased by reducing the
engine load which is caused by the power generation of the generator. The
batt ...
Description
When the brake pedal is depressed, ASCD brake switch is turned OFF and stop
lamp switch is turned ON.
ECM detects the state of the brake pedal by those two types of input (ON/OFF
s ...
Other materials:
Precaution
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and
"SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT
PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk
or severity of injury to the driver and front passenger for ...
Power supply and ground circuit
Diagnosis Procedure
1. CHECK FUSE AND FUSIBLE LINK
Check if the following BCM fuses or fusible link are blown
2. CHECK POWER SUPPLY CIRCUIT
Turn ignition switch OFF.
Disconnect BCM.
Check voltage between BCM harness connector and ground.
3. CHECK GROUND CIRCUIT
Check contin ...
Steering column covers
Removal and Installation
MANUAL TILT
Removal
Remove the steering column cover screw finishers (1) and then
remove the screws.
Remove the steering column upper cover (2).
Remove the steering column lower cover screw and then remove
the steering column lower cover (3).
Installatio ...