Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 1857
7A2-44 DIAGNOSIS
Terminal Assembly
Inhibitor Switch
Setting Condition:
•
No range signal is entered from the inhibitor switch with the engine speed over 500 rpm for 2 seconds.
Or
•
Multiple signals are entered from the inhibitor switch for 1 second.
Fail Safe:
•
When the vehicle is running, the gear position selected at the trouble detection is held and the lock-up is
inhibited.
•
After the vehicle stopped, all solenoid operations stop (OFF) and the gear is fixed to the 3rd.
Possible Cause:
•
Inhibitor switch incorrect adjustment.
•
Inhibitor
switch
malfunction.
•
Open circuit or short circuit to battery between inhibitor switch terminal 2 and TCM terminal A2 (C94), terminal 4
and TCM terminal B19 (C95), terminal 8 and TCM terminal B10 (C95), terminal 5 and TCM terminal B11 (C95),
terminal 1 and TCM terminal A17 (C94), terminal 9 and TCM terminal B2 (B95), or terminal 6 and TCM terminal
B21 (C95), or short between respective harness.
•
Power supply wire open circuit or short circuit to ground between inhibitor switch terminal 3 and power supply
circuit.
•
Poor connection of each connector.
Reference:
Following continuity can be measured by circuit tester.
DIAGNOSIS 7A2-45
10 7 3 2 4 8 5 1 9 6
P
R
N
D
3
2
L
7A2-46 DIAGNOSIS
DTC P1120 (Flash Code 22) Throttle Signal Failure
TPS
TCM
A16
C56
(29)
C94
(16)
RED/WHT
C56
(49)
(38)
(57)
(69)
ECM
C56 (ECM-A)
Setting Condition:
•
No throttle signal is sent from the ECM for 0.4 seconds.
Fail Safe:
•
When the vehicle is running, the gear position selected at the trouble detection is held and the lock-up is
inhibited.
•
After the vehicle stopped, all solenoid operations stop (OFF) and the gear is fixed to the 3rd.
Possible Cause:
•
Throttle position sensor malfunction.
•
Signal wire open circuit or short circuit to battery of the harness between ECM A26 (C56) and TCM terminal A16
(C94).
•
Poor connection of each connector.
Reference:
•
At throttle position 0%, OFF duty signal 10% is sent from ECM terminal A26 (C56) to TCM terminal A16 (C94).
•
At throttle position 100% (WOT), OFF duty signal 90% is sent from ECM terminal A26 (C56) to TCM terminal
A16 (C94).
DIAGNOSIS 7A2-47
7.14ms 7.14ms
Time Time
0.714ms 6.426ms
V
oltage
Off duty 10% =Throttle Position 0%
V
oltage
Off duty 90% =Throttle Position 100%
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