Infiniti FX35, FX50 (S51). Manual — part 1663
B2603 SHIFT POSITION STATUS
SEC-65
< DTC/CIRCUIT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
C
D
E
F
G
H
I
J
L
M
A
B
SEC
N
O
P
B2603 SHIFT POSITION STATUS
Description
INFOID:0000000005249479
BCM confirms the shift position with the following 4 signals.
• Selector lever
• P/N position switch
• P position signal from IPDM E/R (CAN)
• P position signal from TCM (CAN)
DTC Logic
INFOID:0000000005249480
DTC DETECTION LOGIC
NOTE:
• If DTC B2603 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
• If DTC B2603 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start the engine under the following conditions and wait for at least 1 second.
-
Selector lever is in the P position.
-
Do not depress the brake pedal.
2.
Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005249481
1.
CHECK DTC WITH TCM
Check “Self diagnostic result” with CONSULT-III. Refer to
(VK50VE).
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace the malfunctioning parts.
2.
CHECK TRANSMISSION RANGE SWITCH CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect A/T assembly connector and BCM connector M123.
3.
Check continuity between TCM harness connector and BCM harness connector.
4.
Check continuity between TCM harness connector and ground.
DTC
Self-diagnosis name
DTC detecting condition
Possible causes
B2603
SHIFT POSITION
STATUS
BCM detects the followings status for 500 ms or
more when shift is in the P position, and ignition
switch is in the ON position.
• Transmission range switch: approx. 0 V
• A/T shift selector (detention switch): approx. 0 V
• Harness or connector
(A/T shift selector circuit is open or
shorted)
• Harness or connectors
[Transmission range switch circuit is
open or shorted]
• A/T shift selector (detention switch)
• Transmission range switch
• BCM
A/T assembly
BCM
Continuity
Connector
Terminal
Connector
Terminal
F51
9
M123
140
Existed
SEC-66
< DTC/CIRCUIT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
B2603 SHIFT POSITION STATUS
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness.
3.
CHECK A/T SHIFT SELECTOR POWER SUPPLY
1.
Disconnect A/T shift selector (detention switch) connector.
2.
Check voltage between A/T shift selector (detention switch) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
CHECK A/T SHIFT SELECTOR POWER SUPPLY CIRCUIT
1.
Disconnect BCM connector M122.
2.
Check continuity between A/T shift selector (detention switch) harness connector and BCM harness con-
nector.
3.
Check continuity between A/T shift selector (detention switch) harness connector and ground.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-83, "Removal and Installation"
NO
>> Repair or replace harness.
5.
CHECK A/T SHIFT SELECTOR CIRCUIT
1.
Disconnect BCM connector M122 and IPDM E/R connector E6.
2.
Check continuity between A/T shift selector (detention switch) harness connector and BCM harness con-
nector.
3.
Check continuity between A/T shift selector (detention switch) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace harness.
A/T assembly
Ground
Continuity
Connector
Terminal
F51
9
Not existed
(+)
(–)
Voltage (V)
(Approx.)
A/T shift selector (detention switch)
Connector
Terminal
M137
10
Ground
Battery voltage
A/T shift selector (detention switch)
BCM
Continuity
Connector
Terminal
Connector
Terminal
M137
10
M122
96
Existed
A/T shift selector (detention switch)
Ground
Continuity
Connector
Terminal
M137
10
Not existed
A/T shift selector (detention switch)
BCM
Continuity
Connector
Terminal
Connector
Terminal
M137
11
M122
99
Existed
A/T shift selector (detention switch)
Ground
Continuity
Connector
Terminal
M137
11
Not existed
B2603 SHIFT POSITION STATUS
SEC-67
< DTC/CIRCUIT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
C
D
E
F
G
H
I
J
L
M
A
B
SEC
N
O
P
6.
CHECK A/T SHIFT SELECTOR (DETENTION SWITCH)
SEC-62, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace A/T shift selector. Refer to
TM-169, "Removal and Installation"
(VK50VE).
7.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
.
>> INSPECTION END
SEC-68
< DTC/CIRCUIT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
B2604 PNP SWITCH
B2604 PNP SWITCH
Description
INFOID:0000000005249482
BCM confirms the shift position with the following 4 signals.
• Selector lever
• P/N position switch
• P position signal from IPDM E/R (CAN)
• P position signal from TCM (CAN)
DTC Logic
INFOID:0000000005249483
DTC DETECTION LOGIC
NOTE:
• If DTC B2604 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
.
• If DTC B2604 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
.
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start the engine under the following conditions and wait for at least 1 second.
-
Selector lever is in the P or N position
-
Do not depress the brake pedal
2.
Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005249484
1.
CHECK DTC WITH TCM
Check “Self diagnostic result” with CONSULT-III. Refer to
(VK50VE).
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace the malfunctioning parts.
2.
CHECK TRANSMISSION RANGE SWITCH SIGNAL CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect A/T assembly connector and BCM connector M123.
3.
Check continuity between A/T assembly harness connector and BCM harness connector.
4.
Check continuity between A/T assembly harness connector and ground.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B2604
PNP SWITCH
BCM detects the following status for 500 ms or
more when the ignition switch is in ON position.
• N position input signal exists. Shift position signal
from TCM does not exist.
• N position input signal does not exist. Shift posi-
tion signal from TCM exists.
• Harness or connectors
[Transmission range switch circuit
is open or shorted]
• Transmission range switch
• TCM
A/T assembly
BCM
Continuity
Connector
Terminal
Connector
Terminal
F51
9
M123
140
Existed
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