TROUBLESHOOTING
Investigate the input signal system
1. W hen you get an unusual signal, m easure the #1
PCM term inal voltage.
• If the #1 terminal voltage and the NGS monitor
voltage are the same, proceed to the next
step.
• If there is a difference of 0.5V or more, inspect
the following points concerning the PCM
connector.
— Female term inal opening looseness
— Coupler (pin holder) damage
— Pin discoloration (blackness)
— Harness/pin crimp is loose or
disconnected.
2. W hen you get an unusual signal, measure the
#2
sensor terminal voltage.
• If there is a 0.5V or m ore difference between
the sensor and NGS voltages, inspect the
harness for open or short circuits.
• If the sensor and NGS voltages are the same,
inspect the following points concerning the
sensor connector. If there are no problems,
proceed to next investigation below.
— Female term inal opening looseness
— Coupler (pin holder) dam age
— Pin discoloration (blackness)
— Harness/pin crim p is loose or
disconnected.
Investigate the electrical supply system
1. Confirm that the sensor #3 term inal is B+.
• If the measured voltage on the #3 term inal is
B+, inspect the following points on the sensor
connector. If there is no problem, proceed to
next investigation below.
— Female term inal opening looseness
— Coupler (pin holder) damage
— Pin discoloration (blackness)
• If the #3 terminal measures other than B+,
inspect for the following.
— Open or short circuit in harness
— Harness/pin crimp is loose or
disconnected.
Investigate the GND system
1. Confirm that terminal sensor #4 is at 0V.
• If it is at 0V, inspect the sensor. If necessary,
replace the sensor.
• If not at 0V, inspect for the following.
— Open circuit in harness
— Female term inal opening looseness
— Coupler (pin holder) dam age
— Pin discoloration (blackness)
— Harness/pin crim p is loose or
disconnected.
Thermistor type (Intake air temperature (IAT) and
engine coolant temperature (ECT) sensors)
PCM
Investigate the input signal system
1. When you get an unusual signal, measure the #1
PCM terminal voltage.
• If the #1 terminal voltage and the NGS monitor
voltage are the same, proceed to the next
step.
• If there is a difference of
0.5V
or more, inspect
the following points concerning the PCM
connector.
— Female terminal opening looseness
— Coupler (pin holder) damage
— Pin discoloration (blackness)
— Harness/pin crimp is loose or
disconnected.
2. When you get an unusual signal, measure the #2
sensor terminal voltage.
• If there is a
0.5V
or more difference between
the sensor and NGS voltages, inspect the
harness for open or short circuits.
• If the sensor and NGS voltages are the same,
inspect the following points concerning the
sensor connector. If there are no problems,
proceed to next investigation below.
— Female terminal opening looseness
— Coupler (pin holder) damage
— Pin discoloration (blackness)
— Harness/pin crimp is loose or
disconnected.
Investigate the
GND
system
1. Confirm that terminal sensor
#3
is at
0V.
• If it is at
0V,
inspect the sensor. If necessary,
replace the sensor.
• If not, inspect the following.
— Open circuit in harness
— Female terminal opening looseness
— Coupler (pin holder) damage
— Pin discoloration (blackness)
— Harness/pin crimp is loose or
disconnected.
F1-148
Summary of Contents for 626 Station Wagon
Page 25: ...CONTROL SYSTEM WIRING DIAGRAM With Immobilizer System OUTLINE F1 4 ...
Page 183: ...CONTROL SYSTEM COMPONENT LOCATION F2 7 ...
Page 204: ...MANUAL TRANSAXLE FEATURES OUTLINE J 2 OUTLINE OF CONSTRUCTION J 2 SPECIFICATIONS J 2 D J 1 ...
Page 266: ...SHIFT MECHANISM 6 Apply grease to the cam as shown K2 59 ...
Page 418: ...TROUBLESHOOTING KEYLESS ENTRY SYSTEM ON BOARD DIAGNOSTIC FUNCTION S 37 ...
Page 454: ...WARNING AND INDICATOR SYSTEM O p e ra tin g O rd e r T 32 ...