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![INFINITI FX35 2004 Service Manual EC-628
[VQ35DE]
ASCD BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
3. CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector. INFINITI FX35 2004 Service Manual EC-628
[VQ35DE]
ASCD BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
3. CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.](/manual-img/42/57021/w960_57021-1968.png)
EC-628
[VQ35DE]
ASCD BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
3. CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Turn ignition switch ON.
4. Check voltage between ASCD brake switch terminal 1 and
ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector E201
10A fuse
Harness for open or short between ASCD brake switch and fuse
>> Repair open circuit or short to ground in harness or connectors.
5. CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 108 and ASCD brake switch terminal 2.
Refer to Wiring Diagram.
4. 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 E211, M41
Harness for open or short between ECM and ASCD brake switch
>> Repair open circuit or short to ground in harness or connectors.
PBIB1605E
Voltage: Battery voltage
PBIB0857E
Continuity should exist.
Page 1970 of 4449
![INFINITI FX35 2004 Service Manual ASCD BRAKE SWITCH
EC-629
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Revision: 2004 November 2004 FX35/FX45
7. CHECK ASCD BRAKE SWITCH
Refer to EC-631, "
Component Inspection"
OK or NG
OK >> GO TO 13.
NG >> INFINITI FX35 2004 Service Manual ASCD BRAKE SWITCH
EC-629
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7. CHECK ASCD BRAKE SWITCH
Refer to EC-631, "
Component Inspection"
OK or NG
OK >> GO TO 13.
NG >>](/manual-img/42/57021/w960_57021-1969.png)
ASCD BRAKE SWITCH
EC-629
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7. CHECK ASCD BRAKE SWITCH
Refer to EC-631, "
Component Inspection"
OK or NG
OK >> GO TO 13.
NG >> Replace ASCD brake switch.
8. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check voltage between stop lamp switch terminal 1 and ground
with CONSULT -II or tester.
OK or NG
OK >> GO TO 10.
NG >> GO TO 9.
9. DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector E201
10A fuse
Joint connector-2
Harness for open or short between stop lamp switch and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
10. CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.
PBIB1605E
Voltage: Battery voltage
PBIB1184E
Continuity should exist.
Page 1971 of 4449
EC-630
[VQ35DE]
ASCD BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
11 . DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E211, M41
Joint connector-2
Harness for open or short between ECM and stop lamp switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
12. CHECK STOP LAMP SWITCH
Refer to EC-631, "
Component Inspection"
OK or NG
OK >> GO TO 13.
NG >> Replace stop lamp switch.
13. CHECK INTERMITTENT INCIDENT
Refer to EC-135, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Page 1972 of 4449
![INFINITI FX35 2004 Service Manual ASCD BRAKE SWITCH
EC-631
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Revision: 2004 November 2004 FX35/FX45
Component InspectionABS006Z1
ASCD BRAKE SWITCH
1. Turn ignition switch OFF.
2. Disconnect ASCD brake INFINITI FX35 2004 Service Manual ASCD BRAKE SWITCH
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Component InspectionABS006Z1
ASCD BRAKE SWITCH
1. Turn ignition switch OFF.
2. Disconnect ASCD brake](/manual-img/42/57021/w960_57021-1971.png)
ASCD BRAKE SWITCH
EC-631
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Revision: 2004 November 2004 FX35/FX45
Component InspectionABS006Z1
ASCD BRAKE SWITCH
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness connector.
3. Check harness continuity between ASCD brake switch terminals
1 and 2 under the following conditions.
If NG, adjust ASCD brake switch installation, refer to BR-6,
"BRAKE PEDAL" , and perform step 3 again.
STOP LAMP SWITCH
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check harness continuity between stop lamp switch terminals 1
and 2 under the following conditions.
If NG, adjust stop lamp switch installation, refer to BR-6,
"BRAKE PEDAL" , and perform step 3 again.
Condition Continuity
When brake pedal is fully released. Should exist.
When brake pedal is slightly depressed. Should not exist.
SEC023D
Condition Continuity
When brake pedal is fully released. Should not exist.
When brake pedal is slightly depressed. Should exist.
PBIB1185E
Page 1973 of 4449
![INFINITI FX35 2004 Service Manual EC-632
[VQ35DE]
ASCD INDICATOR
Revision: 2004 November 2004 FX35/FX45
ASCD INDICATORPFP:24814
Component DescriptionABS006Z2
ASCD indicator lamp illuminates to indicate ASCD operation status. Lamp has INFINITI FX35 2004 Service Manual EC-632
[VQ35DE]
ASCD INDICATOR
Revision: 2004 November 2004 FX35/FX45
ASCD INDICATORPFP:24814
Component DescriptionABS006Z2
ASCD indicator lamp illuminates to indicate ASCD operation status. Lamp has](/manual-img/42/57021/w960_57021-1972.png)
EC-632
[VQ35DE]
ASCD INDICATOR
Revision: 2004 November 2004 FX35/FX45
ASCD INDICATORPFP:24814
Component DescriptionABS006Z2
ASCD indicator lamp illuminates to indicate ASCD operation status. Lamp has two indicators, CRUISE and
SET, and is integrated in combination meter.
CRUISE indicator illuminates when ON/OFF(MAIN) switch on ASCD steering switch is turned ON to indicated
that ASCD system is ready for operation.
SET indicator illuminates when following conditions are met.
CRUISE indicator is illuminated.
SET switch on ASCD steering switch is turned ON while vehicle speed is within the range of ASCD set-
ting.
SET indicator remains lit during ASCD control.
Refer to EC-657, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)" for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeABS006Z3
Specification data are reference value.
MONITOR ITEM CONDITION SPECIFICATION
CRUISE LAMP
Ignition switch: ONON/OFF(MAIN) switch: Pressed
at the 1st time → at the 2nd timeON → OFF
SET LAMP
ON/OFF(MAIN) switch: ON
When vehicle speed is
between 40 km/h (25 MPH)
and 144 km/h (89 MPH)
ASCD is operating ON
ASCD is not operating OFF
Page 1974 of 4449
ASCD INDICATOR
EC-633
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Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS006Z4
TBWM0267E
Page 1975 of 4449
![INFINITI FX35 2004 Service Manual EC-634
[VQ35DE]
ASCD INDICATOR
Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureABS006Z5
1. CHECK OVERALL FUNCTION
Check ASCD indicator under the following conditions.
OK or NG
OK >>INSPECTI INFINITI FX35 2004 Service Manual EC-634
[VQ35DE]
ASCD INDICATOR
Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureABS006Z5
1. CHECK OVERALL FUNCTION
Check ASCD indicator under the following conditions.
OK or NG
OK >>INSPECTI](/manual-img/42/57021/w960_57021-1974.png)
EC-634
[VQ35DE]
ASCD INDICATOR
Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureABS006Z5
1. CHECK OVERALL FUNCTION
Check ASCD indicator under the following conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2. CHECK DTC
Check that DTC U1000 or U1001 is not displayed.
OK or NG
OK >> GO TO 3.
NG >> Perform trouble diagnoses for DTC U1000, U1001. Refer to EC-142, "
DTC U1000, U1001 CAN
COMMUNICATION LINE" .
3. CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to DI-32, "
SELF-DIAGNOSTIC RESULTS" .
OK or NG
OK >> GO TO 4.
NG >> Go to DI-22, "
Communication Line Inspection" .
4. CHECK INTERMITTENT INCIDENT
Refer to EC-135, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
ASCD INDICATOR CONDITION SPECIFICATION
CRUISE LAMP
Ignition switch: ONON/OFF(MAIN) switch: pressed
at the 1st time → at the 2nd timeON → OFF
SET LAMP
ON/OFF(MAIN) switch: ON
When vehicle speed is
between 40 km/h (25 MPH)
and 144 km/h (89 MPH)
ASCD is operating ON
ASCD is not operating OFF
Page 1976 of 4449
![INFINITI FX35 2004 Service Manual SNOW MODE SWITCH
EC-635
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Revision: 2004 November 2004 FX35/FX45
SNOW MODE SWITCHPFP:25310
DescriptionABS00A2B
NOTE:
If DTC U1000 or U1001 are displayed, first perform INFINITI FX35 2004 Service Manual SNOW MODE SWITCH
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Revision: 2004 November 2004 FX35/FX45
SNOW MODE SWITCHPFP:25310
DescriptionABS00A2B
NOTE:
If DTC U1000 or U1001 are displayed, first perform](/manual-img/42/57021/w960_57021-1975.png)
SNOW MODE SWITCH
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Revision: 2004 November 2004 FX35/FX45
SNOW MODE SWITCHPFP:25310
DescriptionABS00A2B
NOTE:
If DTC U1000 or U1001 are displayed, first perform the trouble diagnosis for DTC U1000, U1001.
Refer to EC-142, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .
The snow mode switch signal is sent to the “unified meter and A/C amp.” from the snow mode switch. The
“unified meter and A/C amp.” then sends the signal to the ECM by CAN communication line.
The snow mode is used for driving or starting the vehicle on snowy roads or slippery areas. If the snow mode
is activated, the vehicle speed will not be accelerated immediately than your original pedal in due to avoid the
vehicle slip. In other words, ECM controls the rapid engine torque change by controlling the electric throttle
control actuator operating speed.
CONSULT-II Reference Value in the Data Monitor ModeABS00A2C
MONITOR ITEM CONDITION SPECIFICATION
SNOW MODE SW
Ignition switch: ONSNOW MODE SW: ON ON
SNOW MODE SW: OFF OFF