2004 INFINITI QX56 Factory Service Manual

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Page 177 of 3371

INFINITI QX56 2004 Factory Service Manual AT-106
DTC P0615 START SIGNAL CIRCUIT
Revision: August 20072004 QX56
Diagnostic ProcedureUCS002DJ
1. CHECK STARTER RELAY
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Se

Page 178 of 3371

INFINITI QX56 2004 Factory Service Manual DTC P0615 START SIGNAL CIRCUIT
AT-107
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Revision: August 20072004 QX56
5. CHECK DTC
Perform “DTC Confirmation Procedure”.
Refer to AT- 1 0 5 , "DTC Confirmation Procedure

Page 179 of 3371

INFINITI QX56 2004 Factory Service Manual AT-108
DTC P0700 TCM
Revision: August 20072004 QX56
DTC P0700 TCMPFP:31036
DescriptionUCS002DK
The TCM consists of a microcomputer and connectors for signal input and output and for power supply. The

Page 180 of 3371

INFINITI QX56 2004 Factory Service Manual DTC P0705 PARK/NEUTRAL POSITION SWITCH
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Revision: August 20072004 QX56
DTC P0705 PARK/NEUTRAL POSITION SWITCHPFP:32006
DescriptionUCS002DP
The park/neutral position (P

DTC P0705 PARK/NEUTRAL POSITION SWITCH
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DTC P0705 PARK/NEUTRAL POSITION SWITCHPFP:32006
DescriptionUCS002DP
The park/neutral position (PNP) switch includes a transmission position switch.
The transmission range switch detects the selector lever position and sends a signal to the TCM.
CONSULT-II Reference ValueUCS002DQ
On Board Diagnosis LogicUCS002D R
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “PNP SW/CIRC” with CONSULT-II or P0705 without CONSULT-II is detected
under the following conditions.
–When TCM does not receive the correct voltage signal from the PNP switch 1, 2, 3, 4 based on the gear
position.
–When no other position but “P” position is detected from “N” positions.
Possible CauseUCS002DS
Harness or connectors
[The park/neutral position (PNP) switch 1, 2, 3, 4 and TCM circuit is open or shorted.]
Park/neutral position (PNP) switch 1, 2, 3, 4
DTC Confirmation ProcedureUCS002DT
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “ENGINE” with CONSULT-II.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 2
consecutive seconds.
THRTL POS SEN: More than 1.2V
5. If DTC is detected, go to AT - 11 0 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “With CONSULT-II”.
Item name Condition Display value
SLCTLVR POSI Selector lever in “N”,“P” position. N/P
Selector lever in “R” position. R
Selector lever in “D” position. D
Selector lever in “4” position. 4
Selector lever in “3” position. 3
Selector lever in “2” position. 2
Selector lever in “1” position. 1
BCIA0030E

Page 181 of 3371

INFINITI QX56 2004 Factory Service Manual AT-110
DTC P0705 PARK/NEUTRAL POSITION SWITCH
Revision: August 20072004 QX56
Diagnostic ProcedureUCS002DU
1. CHECK PNP SW CIRCUIT
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engin

Page 182 of 3371

INFINITI QX56 2004 Factory Service Manual DTC P0705 PARK/NEUTRAL POSITION SWITCH
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6. CHECK DTC
Perform “DTC Confirmation Procedure”.
Refer to AT- 1 0 9 , "DTC Confirmation P

Page 183 of 3371

INFINITI QX56 2004 Factory Service Manual AT-112
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
Revision: August 20072004 QX56
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)PFP:32702
DescriptionUCS002DV
The revolution sensor d

AT-112
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
Revision: August 20072004 QX56
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)PFP:32702
DescriptionUCS002DV
The revolution sensor detects the revolution of the idler gear parking pawl lock gear and emits a pulse signal.
The pulse signal is sent to the TCM which converts it into vehicle speed.
CONSULT-II Reference ValueUCS002DW
On Board Diagnosis LogicUCS002DX
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “VEH SPD SEN/CIR AT” with CONSULT-II or P0720 without CONSULT-II is
detected under the following conditions.
–When TCM does not receive the proper voltage signal from the sensor.
–After ignition switch is turned “ON”, irregular signal input from vehicle speed sensor MTR before the vehi-
cle starts moving.
Possible CauseUCS002DY
Harness or connectors
(The sensor circuit is open or shorted.)
Revolution sensor
Vehicle speed sensor MTR
DTC Confirmation ProcedureUCS002DZ
CAUTION:
Always drive vehicle at a safe speed.
Be careful not to rev engine into the red zone on the tachometer.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Drive vehicle and check for an increase of “VHCL/S SE·A/T”
value in response to “VHCL/S SE·MTR” value.
If the check result is NG, go to AT-113, "
Diagnostic Procedure" .
If the check result is OK, go to following step.
4. Select “DATA MONITOR” mode for “ENGINE” with CONSULT-II.
5. Start engine and maintain the following conditions for at least 5
consecutive seconds.
VHCL SPEED SE: 30 km/h (19 MPH) or more
THRTL POS SEN: More than 1.0/8
Selector lever: “D” position
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
If the check result is NG, go to AT-113, "
Diagnostic Procedure" .
If the check result is OK, go to following step.
6. Maintain the following conditions for at least 5 consecutive seconds.
ENGINE SPEED: 3,500 rpm or more
THRTL POS SEN: More than 1.0/8
Selector lever: “D” position
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
If the check result is NG, go to AT-113, "
Diagnostic Procedure" .
Item name Condition Display value (km/h)
VHCL/S SE·A/T During driving Approximately matches the speedometer reading.
BCIA0030E

Page 184 of 3371

INFINITI QX56 2004 Factory Service Manual DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
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Revision: August 20072004 QX56
WITH GST
Follow the procedure “With CONSULT-II”.
Diagnostic ProcedureUCS002E

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