Nissan Titan. Manual - part 577
STR-12
< DTC/CIRCUIT DIAGNOSIS >
B TERMINAL CIRCUIT
DTC/CIRCUIT DIAGNOSIS
B TERMINAL CIRCUIT
Description
INFOID:0000000009886983
Terminal "1" (B) is constantly supplied with battery power.
Diagnosis Procedure
INFOID:0000000009886984
Regarding Wiring Diagram information, refer to
.
CAUTION:
Before testing, perform the following procedure to ensure the engine cannot start.
1. Remove fuel pump fuse.
2. Crank or start the engine (where possible) until the fuel pressure is depleted.
1.
CHECK TERMINAL 1 POWER SUPPLY VOLTAGE
1. Turn ignition switch OFF.
2. Make sure that starter motor connector F27 terminal 1 connection is clean and tight.
3. Check voltage between starter motor connector F27 terminal 1 and ground.
Is there battery voltage present?
YES
>> GO TO 2
NO
>> Check harness between battery and starter motor for open circuit.
2.
CHECK BATTERY CABLE (VOLTAGE DROP TEST)
1. Shift the transmission into park or neutral.
2. Check voltage between battery positive terminal and starter motor connector F27 terminal 1 while crank-
ing the engine.
Is the voltage drop less than 0.2V?
YES
>> GO TO 3
NO
>> Check harness between the battery and the starter motor for high resistance.
3.
CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST)
Check voltage between starter motor case and battery negative terminal while cranking the engine.
Is the voltage drop less than 0.2V?
YES
>> Terminal 1 circuit is OK. Further inspection is necessary. Refer to
or
STR-8, "Work Flow (Without GR8-1200 NI)"
NO
>> Check the starter motor case to engine mounting for high resistance.
(+)
(-)
Voltage
Connector
Terminal
F27
1
Ground
Battery voltage
(+)
(-)
Condition
Voltage
Battery (+) terminal
Connector
Terminal
F27
1
While cranking the engine
Less than 0.2V
(+)
(-)
Condition
Voltage
Starter motor case
Battery (-) terminal
While cranking the engine
Less than 0.2V