Nissan Quest E52. Instruction — part 542
EC-378
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P1651 STARTER MOTOR RELAY
Is the starter motor operated?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK DTC WITH IPDM E/R
Check DTC with IPDM E/R. Refer to
PCS-13, "CONSULT Function (IPDM E/R)"
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Perform trouble diagnosis for DTC indicated.
3.
CHECK DTC WITH BCM
Check DTC with BCM. Refer to
BCS-34, "BCM : CONSULT Function (BCM - BCM)"
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Perform trouble diagnosis for DTC indicated.
4.
CHECK CRANKING REQUEST SIGNAL CIRCUIT-I
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Disconnect IPDM E/R harness connector.
4.
Check the continuity between ECM harness connector and IPDM E/R harness connector.
5.
Also check harness for short to ground to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK CRANKING REQUEST SIGNAL CIRCUIT-II
1.
Disconnect BCM harness connector.
2.
Check the continuity between ECM harness connector and BCM harness connector.
.
3.
Also check harness for short to ground to power.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK INTERMITTENT INCIDENT
Perform
GI-42, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-36, "Removal and Installation"
NO
>> Repair or replace error-detected parts.
+
−
Continuity
ECM
IPDM E/R
Connector
Terminal
Connector
Terminal
F7
8
F12
71
Existed
+
−
Continuity
ECM
BCM
Connector
Terminal
Connector
Terminal
F7
8
M69
64
Existed
P1652 STARTER MOTOR SYSTEM COMM
EC-379
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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P1652 STARTER MOTOR SYSTEM COMM
Description
INFOID:0000000009651229
ECM controls ON/OFF state of the starter relay, according to the engine and vehicle condition. Models with no
Intelligent Key System transmit a control signal directly to IPDM E/R. On the other hand, models with the Intel-
ligent Key System transmit a control signal to IPDM E/R by way of BCM via CAN communication.
Under normal conditions, ECM controls and maintains the starter relay in OFF state during engine running or
“D” position.
When detecting a decrease in engine speed due to rapid deceleration or heavy load condition, ECM controls
and reactivates the starter relay.
IPDM E/R detects a control state of starter relay and starter control relay and transmits a feedback signal to
ECM via CAN communication.
DTC Logic
INFOID:0000000009651230
DTC DETECTION LOGIC
NOTE:
• If DTC P1652 is displayed with DTC U1001, perform the trouble diagnosis for DTC U1001. Refer to
.
• If DTC P1652 is displayed with DTC P0607, perform the trouble diagnosis for DTC P0607. Refer to
.
• If DTC P1652 is displayed with B209F or B20A0 of IPDM E/R, perform the trouble diagnosis for B209F or
B20A0. Refer to
.
• If DTC P1652 is displayed with B26F9 or B26FA of BCM, perform the trouble diagnosis for B209F or B20A0.
.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON and wait at least 5 minutes.
3.
Check DTC.
Is DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009651231
1.
INSPECTION START
1.
Erase DTC.
2.
Perform DTC confirmation procedure. Refer to
3.
Check DTC.
Is the P1652 displayed again?
YES
>> GO TO 2.
DTC No.
Trouble diagnosis name
(Trouble diagnosis content)
DTC detecting condition
P1652
STR MTR SYS COMM
(Starter motor communication line)
ECM detects malfunction in starter motor drive circuit of the IPDM E/R.
IPDM E/R
EC-380
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P1652 STARTER MOTOR SYSTEM COMM
NO
>> INSPECTION END
2.
CHECK INTERMITTENT INCIDENT
Perform
GI-42, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-36, "Removal and Installation"
NG
>> Repair or replace error-detected parts.
P1700 CVT CONTROL SYSTEM
EC-381
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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P1700 CVT CONTROL SYSTEM
Description
INFOID:0000000009651232
This DTC is displayed with other DTC regarding TCM. Perform the trouble diagnosis for corresponding DTC.
Refer to
. When this DTC is detected, the ASCD control is canceled.
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