Infiniti G20 (P11). Manual — part 519
3
CHECK STARTER MOTOR GROUND CIRCUIT (VOLTAGE DROP TEST)
1. Check voltage between starter motor case and battery negative terminal using a digital circuit tester.
SEL947X
OK or NG
OK
©
Starter motor “B” terminal circuit is OK. Further inspection necessary. Refer to “WORK
FLOW”, SC-15.
NG
©
Check the starter motor case and ground for poor continuity.
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
EL
IDX
STARTING SYSTEM
Trouble Diagnoses with Battery/Starting/Charging System Tester (Cont’d)
SC-17
DIAGNOSTIC PROCEDURE 2
=NCSC0019S04
Check “S” Terminal Circuit
NCSC0019S0401
1
CHECK POWER SUPPLY FOR STARTER MOTOR “S” TERMINAL
1. Remove the fuel pump fuse.
2. Crank or start the engine (where possible) until the fuel pressure is released.
3. Turn the ignition OFF.
4. Disconnect starter motor connector.
5. Check voltage between starter motor connector E118 terminal 2 (B/W for M/T models or B/Y for A/T models) and
ground using a digital circuit tester.
SEL948X
OK or NG
OK
©
GO TO 2.
NG
©
Check the following.
I
40A fusible link (letter g, located in fuse and fusible link box)
I
Park/neutral position relay
I
Harness for open or short
2
CHECK “S” TERMINAL CONNECTION QUALITY (VOLTAGE DROP TEST)
1. Connect starter motor connector.
2. Check voltage between starter motor connector E118 terminal 2 (B/W for M/T models or B/Y for A/T models) and bat-
tery positive terminal using a digital tester.
SEL949X
OK or NG
OK
©
Starter motor “S” terminal circuit is OK. Further inspection necessary. Refer to “WORK
FLOW”, SC-15.
NG
©
Check harness between the battery and the starter motor “S” terminal for poor continuity.
STARTING SYSTEM
Trouble Diagnoses with Battery/Starting/Charging System Tester (Cont’d)
SC-18
MINIMUM SPECIFICATION OF CRANKING VOLTAGE
REFERENCING COOLANT TEMPERATURE
NCSC0019S05
Engine coolant temperature
Voltage V
−30°C to −20°C (−22°F to −4°F)
8.0
−19°C to −10°C (−2°F to 14°F)
8.8
−9°C to 0°C (16°F to 32°F)
9.1
More than 1°C (More than 34°F)
9.3
Construction
NCSC0006
MEL645K
MEL646K
Removal and Installation
NCSC0007
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
EL
IDX
STARTING SYSTEM
Trouble Diagnoses with Battery/Starting/Charging System Tester (Cont’d)
SC-19
Pinion/Clutch Check
NCSC0008
1.
Inspect pinion teeth.
I
Replace pinion if teeth are worn or damaged. (Also check
condition of ring gear teeth.)
2.
Inspect reduction gear teeth.
I
Replace reduction gear if teeth are worn or damaged. (Also
check condition of armature shaft gear teeth.)
3.
Check to see if pinion locks in one direction and rotates
smoothly in the opposite direction.
I
If it locks or rotates in both directions, or unusual resistance is
evident, replace.
STARTING SYSTEM
Pinion/Clutch Check
SC-20
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