Isuzu N-Series. Manual — part 460
6E-176 EMISSION AND ELECTRICAL DIAGNOSIS
DTC-22 Rack Sensor Circuit High Voltage
Location of Rack Sensor Connector
Legend
1. OSC (red)
3. GND (black)
2. MDL (white)
4. Rack sensor
N6A1319E
N6A1320E
EMISSION AND ELECTRICAL DIAGNOSIS 6E-177
Connector Name of Rack Sensor
Notice:
Mark “___” on connector which is plugged, therefore,
should be confirmed to be played.
Relation Between Connector Number and Signal
Name
Connector
No
Signal name
Wire color
1
Rack sensor (OSC)
R
2
Rack sensor (GND)
B
4
Rack sensor (MDL)
W
N6A1321E
6E-178 EMISSION AND ELECTRICAL DIAGNOSIS
Step
Action
Value
YES
NO
1
Was the “Diagnostic system check” per-
formed?
—
Go to diagnostic
system check
2
Remove Sensor Connector.
Has DTC22 been corrected? (Ignore DTC 21)
—
3
1. Jumper Harness signal Terminal and
GND terminal at the Sensor side of Con-
nector.
2. Ignition “ON”
Has DTC22 been corrected?
—
4
1. Check the Sensor Connector for inter ter-
minal short.
After check, repair if necessary.
Was Connector Terminal shorted?
—
5
1. Check the GND Circuit for disconnect.
After check, repair if necessary.
Is GND circuit disconnect?
—
6
1. Check the Sensor Harness signal circuit
and power source circuit for short.
After check, repair if necessary.
Was Harness shorted?
—
7
1. Check the Harness signal circuit and pow-
er source for short.
After check, repair if necessary.
Was Harness shorted?
—
8
1. Apply 5V to RACK+ TERMINAL.
2. Measure RACK SIG Voltage.
Is RACK SIG VOLTAGE as specified?
0.9 — 2.0V
(Idling speed)
9
1. Check the iron core of RACK Sensor for
damage, seizure, and wear.
2. After check, repair if necessary.
Was there any trouble in the iron core(RACK
end) inside RACK Sensor?
—
10
Replace the RACK Sensor.
Is the action complete?
—
—
11
Replace the ECM.
Is the action complete?
—
—
12
1. Reconnect all the connectors removed.
2. Ignition “ON”, Engine “OFF”
Is DTC22 all right under Scan Tool Check?
—
13
Is any current trouble other than DTC 22 dis-
played by indicator light?
—
Go to trouble code
section
Trouble code clear
EMISSION AND ELECTRICAL DIAGNOSIS 6E-179
DTC-31 Exhaust Gas Recirculation (EGR) Vacuum Switching Valve (VSV) Solenoid Control
Low Voltage
N6A1325E
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