Nissan Maxima. Instruction — part 1126
STC-10
< DTC/CIRCUIT DIAGNOSIS >
ENGINE SPEED SIGNAL CIRCUIT
ENGINE SPEED SIGNAL CIRCUIT
Description
INFOID:0000000009466557
ECM sends engine speed signal to power steering control unit.
Diagnosis Procedure
INFOID:0000000009466558
Regarding Wiring Diagram information, refer to
.
1.
PERFORM ECM SELF-DIAGNOSIS
With CONSULT
Perform ECM self-diagnosis.
Is any error system detected?
YES
>> Check the error system.
NO
>> GO TO 2.
2.
CHECK HARNESS BETWEEN ECM AND POWER STEERING CONTROL UNIT FOR OPEN
1. Turn the ignition switch OFF.
2. Disconnect ECM connector E10.
3. Disconnect power steering control unit connector.
4. Check continuity between ECM connector E10 (A) terminal 94
and power steering control unit connector M59 (B) terminal 10.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connectors.
3.
CHECK HARNESS BETWEEN ECM AND POWER STEERING CONTROL UNIT FOR SHORT
1. Check continuity between ECM connector E10 terminal 94 and
ground.
2. Turn ignition switch ON.
3. Check voltage between ECM connector E10 terminal 94 and
ground.
Is the inspection result normal?
YES
>> GO TO 4.
ECM
Power steering control unit
Continuity
Connector
Terminal
Connector
Terminal
E10 (A)
94
M59 (B)
10
Yes
AWGIA0039ZZ
ECM
Ground
Continuity
Connector
Terminal
E10
94
—
No
AWGIA0095ZZ
ECM
Ground
Voltage (Approx.)
Connector
Terminal
E10
94
—
0V
AWGIA0096ZZ
ENGINE SPEED SIGNAL CIRCUIT
STC-11
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
NO
>> Repair harness or connectors.
4.
CHECK ENGINE SPEED SIGNAL (ECM SIDE)
1. Turn the ignition switch OFF.
2. Connect ECM connector E10.
3. Start the engine.
4. Check signal between ECM connector E10 terminal 94 and
ground with oscilloscope.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace ECM.
5.
CHECK ENGINE SPEED SIGNAL (POWER STEERING CONTROL UNIT SIDE)
1. Turn the ignition switch OFF.
2. Connect power steering control unit harness connector.
3. Start the engine.
4. Check signal between power steering control unit harness con-
nector M59 terminal 10 and ground with oscilloscope.
Is the inspection result normal?
ECM
Value (Approx.)
Connector
Terminal
Condition
E10
94 - Ground
Engine speed:
At idle
(Warm-up con-
dition)
Engine speed:
Approx. 2,000
rpm
(Warm-up con-
dition)
AWGIA0119ZZ
JSGIA0143ZZ
PBIA3655J
Power steering control unit
Value (Approx.)
Connector
Terminal
Condition
M59
10 - Ground
Engine speed:
At idle
(Warm-up con-
dition)
Engine speed:
Approx. 2,000
rpm
(Warm-up con-
dition)
AWGIA0120ZZ
JSGIA0143ZZ
PBIA3655J
STC-12
< DTC/CIRCUIT DIAGNOSIS >
ENGINE SPEED SIGNAL CIRCUIT
YES
>> GO TO 6.
NO
>> Replace power steering control unit. Refer to
STC-22, "Removal and Installation"
6.
CHECK TERMINALS AND HARNESS CONNECTORS
1. Check power steering control unit pin terminals for damage or loose connection with harness connector.
2. Check ECM pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair or replace damaged parts.
VEHICLE SPEED SIGNAL CIRCUIT
STC-13
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
VEHICLE SPEED SIGNAL CIRCUIT
Description
INFOID:0000000009466559
Combination meter sends vehicle speed signal to power steering control unit.
Diagnosis Procedure
INFOID:0000000009466560
Regarding Wiring Diagram information, refer to
.
1.
PERFORM COMBINATION METER SELF-DIAGNOSIS
Perform combination meter self-diagnosis.
Is any error system detected?
YES
>> Check the error system.
NO
>> GO TO 2.
2.
CHECK HARNESS BETWEEN COMBINATION METER AND POWER STEERING CONTROL UNIT FOR
OPEN
1. Turn the ignition switch OFF.
2. Disconnect combination meter connector.
3. Disconnect power steering control unit connector.
4. Check continuity between combination meter connector M24 (A)
terminal 30 and power steering control unit connector M59 (B)
terminal 8.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connectors.
3.
CHECK HARNESS BETWEEN COMBINATION METER AND POWER STEERING CONTROL UNIT FOR
SHORT
1. Check continuity between combination meter connector M24
terminal 30 and ground.
Combination meter
Power steering control unit
Continuity
Connector
Terminal
Connector
Terminal
M24 (A)
30
M59 (B)
8
Yes
AWGIA0109ZZ
Combination meter
Ground
Continuity
Connector
Terminal
M24
30
—
No
AWGIA0097ZZ
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