Nissan Terrano r20e. Instruction — part 22
DIAGNOSTIC PROCEDURE
CHECK GROUND CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly
connector in engine compartment.
3. Check resistance between terminal
q
4
and ground.
Resistance: 2.5 - 5
Ω
OK
E
NG
1. Remove control valve
assembly. Refer to
AT-113.
2. Check the following
items:
I
Line pressure solenoid
valve
Refer to “COMPO-
NENT INSPECTION”
on next page.
I
Harness of terminal
cord assembly for
short or open
CHECK POWER SOURCE CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal
q
4
and TCM harness connector terminal
q
2
.
Resistance: 11.2 - 12.8
Ω
OK
E
NG
Check the following items:
I
Dropping resistor
Refer to “COMPONENT
INSPECTION” on next
page.
I
Harness for short or
open between TCM ter-
minal
q
2
and terminal
cord assembly (Main
harness)
CHECK POWER SOURCE CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Check resistance between terminal
q
6
and TCM harness connector terminal
q
1
.
Resistance:
Approximately 0
Ω
If OK, check harness for short to
ground and short to power.
3. Reinstall any part removed.
OK
E
NG
Repair open circuit or short
to ground or short to
power in harness or con-
nector.
Perform “SELF-DIAGNOSIS CODE CON-
FIRMATION PROCEDURE”, AT-84.
OK
E
NG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
YAT321
YAT322
H
H
H
H
TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V
Line Pressure Solenoid Valve (Cont’d)
AT-85
COMPONENT INSPECTION
Line pressure solenoid valve
I
For removal, refer to AT-113.
Resistance check
I
Check resistance between terminal
q
6
and ground.
Solenoid valve
Terminal No.
Resistance
(Approx.)
Line pressure
solenoid valve
q
4
Ground
2.5 - 5
Ω
Operation check
I
Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal
q
4
and ground.
Dropping resistor
I
Check resistance between terminals
q
1
and
q
2
.
Resistance: 11.2 - 12.8
Ω
YAT323
YAT324
YAT325
TROUBLE DIAGNOSIS FOR LINE PRESSURE S/V
Line Pressure Solenoid Valve (Cont’d)
AT-86
Wiring Diagram — AT — PNP/SW
YAT269
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS
AT-87
Park/neutral Position, Overdrive Control or
Throttle (Accelerator) Position Switches
DESCRIPTION
I
Park/neutral position switch
Detects the selector lever position and sends a signal to the
TCM.
I
Overdrive control switch
Detects the overdrive control switch position (ON or OFF) and
sends a signal to the TCM.
I
Throttle (accelerator) position switch
Consists of a wide open throttle position switch and a closed
throttle (accelerator) position switch.
The wide open throttle position switch sends a signal to the
TCM when the throttle valve is open at least 1/2 of the full
throttle position. The closed throttle position switch sends a
signal to the TCM when the throttle valve is fully closed.
YAT336
NAT234
NAT261
NAT306
NAT262
TROUBLE DIAGNOSIS FOR NON-DETECTABLE ITEMS
AT-88
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