Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual — part 635
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–60
Step
Action
Yes
No
1
1. Turn on the starter switch.
When the 4WD Auto Switch is select to the 4WD position, is 0 V
observed between terminal 30 and 46?
Go to Step 2
Repair the 4WD
Auto Switch
circuit.
Go to Step 4
2
When the 4WD Auto Switch is select to the 2WD position, is 12 V
observed between terminals 30 and 46?
Go to Step 3
Repair the 4WD
Auto Switch
circuit.
Go to Step 4
3
When the transfer lever is shifted to the 4L position, is battery
boltage observed between terminals 19 and 46?
The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”.
Replace the
ECU.
Go to Step 4
4
Check that all the parts are mounted.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 4
4B2–61
DRIVE LINE CONTROL SYSTEM (TOD)
Chart B–2
The 4WD AUTO SWITCH circuit is short to battery.
Function of circuit
—
Fail condition
Even after the transfer mode is select from 2H to TOD the indicator lamp status does not
change.
Indicator lamp status
Transfer lever position
High
4WD Auto Switch
D04RY00015
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–62
Step
Action
Yes
No
1
When the 4WD Auto Switch is select to the 4WD position, is 0 V
observed between terminal 30 and 46?
Go to Step 2
Repair the 4WD
Auto Switch
circuit.
Go to Step 7
2
When the 4WD Auto Switch is select to the 2WD position, is 12 V
observed between terminals 30 and 46?
Go to Step 3
Repair the 4WD
Auto Switch
circuit.
Go to Step 7
3
1. Disconnect the ECU connector.
Is the continuity established between terminals (B–49)14 and
(B–49)17?
Go to Step 4
Replace TOD
indicator lamp
bulb or repair the
circuit.
Go to Step 7
4
Is the continuity established between terminals (B–49)14 and
(B–49)6?
Go to Step 5
Replace TOD
indicator lamp
bulb or repair the
circuit.
Go to Step 7
5
Is the continuity established between terminals (B–49)14 and
(B–49)18?
Go to Step 6
Replace TOD
indicator lamp
bulb or repair the
circuit.
Go to Step 7
6
Is the continuity established between terminals (B–49)14 and
(B–49)19?
Replace ECU.
Go to Step 7
Replace TOD
indicator lamp
bulb or repair the
circuit.
Go to Step 7
7
Check that all the parts are mounted.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 7
4B2–63
DRIVE LINE CONTROL SYSTEM (TOD)
Chart C–1
4H switch circuit wires are broken or the battery is short-circuited.
Function of circuit
—
Fail condition
When the 4WD Auto Switch is 4WD mode.
When the lever is shifted from 4L to TOD, the 4L mode remains on the indicator and the
TOD mode is displayed without turning off the previous mode.
Indicator lamp status
Transfer lever position
4L <——> Middle between 4L and High <——> High
4WD Auto Switch
D04RY00015
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