1997 MITSUBISHI TRITON Workshop Manual

I
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ENGINE <4G6> ± On-vehicle Service11A-11
16. Attach a sealing tape to the fixing bolt and nut only for
vehicles for Switzerland.
NOTE
Sealing tape is attached to all new vehicles.
IDLE SPEED CHECK11100190330
1. Before inspection, set the vehicle to the pre-inspection
condition.
2. Check the basic ignition timing. Adjust if necessary.
Standard value: 5 BTDC+2
3. After turning the ignition switch to OFF, connect the MUT-II
to the diagnosis connector.
4. Start the engine and run it at idle.
5. Run the engine at idle for 2 minutes.
6. Check the idle speed.
Curb idle speed: 750+100 r/min
NOTE
The idle speed is controlled automatically by the idle speed
control (ISC) system.
7. If the idle speed is outside the standard value, inspect
the MPI components by referring to GROUP 13A ±
Troubleshooting.
IDLE MIXTURE CHECK11100210265
1. Before inspection, set the vehicle to the pre-inspection
condition.
2. Check that the basic ignition timing is within the standard
value.
Standard value: 5 BTDC+2
3. Turn the ignition switch to OFF and connect the MUT-II
to the diagnosis connector.
4. Start the engine and run it at 2,500 r/min for 2 minutes.
5. Set the CO, HC tester.
6. Check the CO contents and the HC contents at idle.
Standard value:
CO contents: 0.5% or less
HC contents: 100 ppm or less
7. If there is a deviation from the standard value, check
the following items:

Diagnosis output

Closed-loop control (When the closed-loop control
is normal, the output signal of the oxygen sensor
changes between 0 ± 400 mV and 600 ± 1,000 mV
at idle.)

C
om pre ssio n g auge

M
AX M
IN H
ig h
p re ssu re
c h am ber

I
n ta ke v a lv e s id e

C
AM SH AFT O IL S EA L 11 200190272
R EM OVA L A ND IN STA LLA TIO N 1
0 ± 1 2 N m 8
8 N m 1
0 N m 2
4 N m 6T
im in g
m ark C
am sh aft
s p ro cke t C
ord C
am sh aft
s p ro cke t T
im in g b elt lo w er c o ve r

M
D998719 o r
M D998754 M
B990767 C
am sh aft
s p ro cke t L
ip
s e ctio n O
il s e al C
am sh aft (
± ) s cre w driv e r L
ip M
D998713 M
D998719 o r
M D998754 M
B990767 C
am sh aft
s p ro cke t