Isuzu KB P190. Manual - part 1114

7A3-2  ON-VEHICLE SERVICE (JR405E) 

DESCRIPTION 

Before performing on-vehicle service on the automatic 
transmission, check that the engine idling speed and 
general engine condition are normal. 

For shift interlock function, if the ignition key is out of 
“LOCK” position, the shift lever select button can not be 
pushed. (shift lever can not be operated.) 

 

 

 

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AUTOMATIC TRANSMISSION FLUID (ATF) 

Inspect 

Remove the transmission dipstick to check the condition 
of the ATF. 

Check the color and smell of the ATF. 

If the ATF is abnormal color or smells burnt, replace it 
and investigate the cause of trouble. 

 

Coloor of ATF 

Condition 

Clear red 

Normality 

Blackish discoloration 

Defects of power train 
parts (clutches) 

White turbidity 

Include water 

Discoloration of red brown  Deterioration of ATF 

 

 

ATF LEVEL 

Inspect 

Hot Level 

1.  Warm up the engine and the transmission by driving

the vehicle on the road so that the temperature

reaches around 80

°C (176°F). 

 

Do not turn the engine off. 

2.  Park the vehicle on a level surface. 

3.  Apply the parking brake firmly. 

4.  Let the engine run at idle. 

  Move the select lever slowly through all the gear

positions. 

 

Stop in each gear position just long enough for the

transmission to engage. 

5.  Return the select lever to either “P” or “N”. 

6.  Remove the ATF level dipstick. 

 

7.  Wipe the dipstick clean with a paper towel. 

8.  Reinsert the dipstick and wait several seconds. 

9.  Remove the dipstick. 

 

The ATF level should be inside the “H” range on the 

dipstick. 

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If the ATF level is below the “H” range, ATF must be 

added. 

ON-VEHICLE SERVICE (JR405E)  7A3-3 

Cold Level 

The vehicle must not have been driven so that the 
temperature reaches around 20

°C (68°F) before the 

cold level check is made. 

1.  Park the vehicle on a level surface. 

2.  Apply the parking brake firmly. 

3.  Start the engine and allow it to warm up. 

  The engine coolant temperature gauge needle 

should be midway between the “C” mark and “H”

mark. 

4.  Let the engine run at idle. 

  Move the select lever slowly through all the gear 

ranges. 

  Stop in each range just long enough for the

transmission to engage. 

5.  Return the select lever either “P” or “N”. 

6.  Remove the ATF level dipstick. 

7.  Wipe the dipstick clean with a paper towel. 

8.  Reinsert the dipstick and wait several seconds. 
 

 

9.  Remove the dipstick. 

 

The ATF level should be inside the “C” range on the 

dipstick. 

 

If the ATF level is below the “C” range, ATF must be 

added. 

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ATF CHANGE 

1.  Park the vehicle on level ground and block the rear

wheels. 

2. Start the engine and allow it to idle until the ATF

reaches a temperature of 40-50

°C (104-122°F). 

3.  Stop the engine. 

4. Raise the front to the vehicle and support with 

suitable safety stands. 

5.  Remove the drain plug from the oil pan and drain the

ATF (approximately 6 liters). 

 

 
 
 

 

6.  Remove the oil pan. 

7.  Inspect the oil pan (details written below). 

8.  Install the oil pan. 

 

Note: 

Use a new gasket. Clean the oil pan and magnet. 

 

Oil pan bolt torque : 8 N

⋅m (0.8 kgf⋅m/69 lb⋅in) 

9.  Replace the gasket and install the drain plug. 
 

Drain plug torque : 35 N

⋅m (3.6 kgf⋅m/26 lb⋅ft) 

Note: 

Do not reuse the old washer (gasket). 

Clean the drain plug (especially the threaded section). 

10.Remove the safety stands and wheel blocks. 

11.Pour about 5 liters of new ATF. 

12. Start the engine. With your foot on the brake, move 

the shift lever through each gear range, and shift to 

“P” range. 

13.Check the ATF level. Add more ATF carefully as

necessary using the dipstick. Refer to “ATF LEVEL”

preciously in this section. 

Note: 

Keep the engine idle (do not stop it) during the ATF level 
adjustment. 

 

7A3-4  ON-VEHICLE SERVICE (JR405E) 

 

 
 

 

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Inspect 

1. Check the drain plug tip for adhesion of foreign 

substances. 

2.  Check the drained ATF for color, smell and inclusion

of foreign substances. 

3.  Check the oil pan bottom and magnet for adhesion of

foreign substances. 

 

If a problem is discovered during those checks, the

Automatic transmission must be overhauled. 

Note: 

The torque converter and the oil strainer need replacing 
with new ones if the drained ATF contains large 
amounts of metallic or facing flakes. 

In addition, flush the ATF cooler circuit. 

 
 

 

 

 

ON-VEHICLE SERVICE (JR405E)  7A3-5 

TRANSMISSION CONTROL MODULE (TCM) 

 

 

 

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Remove and Disconnect 

1.  Disconnect the negative battery cable. 

2.  Remove the connectors. 

3. Remove the fixing nuts and remove the TCM (1)

from the bracket. 

Note: 

The TCM is fitted under the instrument panel of the 
driver’s compartment via three stud bolts. 

 
 

 

Install or Connect 

Follow the removal steps in the reverse order. Be 
absolutely sure that the connectors are securely 
fastened. 

 

 
 

 

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