2004 ISUZU TF SERIES Workshop Manual

Page 4129 of 4264

ISUZU TF SERIES 2004  Workshop Manual DIAGNOSIS (JR405E)  7A2-137 
No. Z2: Mode Lamp (Power Drive or 3rd Start) Does Not Light Up 
When The Power Mode or 3rd Start Mode is Turned On 
 
Description: 
  The mode lamp on the instrument pane

Page 4130 of 4264

ISUZU TF SERIES 2004  Workshop Manual 7A2-138  DIAGNOSIS (JR405E) 
No. Z6: Poor Fuel Consumption 
 
Description: 
  Poor fuel consumption. 
 
Diagnosis Hints: 
  Basically same causes as "No. C1 - C8: Engine races up (slip) by shift up

Page 4131 of 4264

ISUZU TF SERIES 2004  Workshop Manual DIAGNOSIS (JR405E)  7A2-139 
No. Z11: Abnormal Oil Pressure 
 
Description: 
  Oil pressure is low or high. 
 
Possible Cause: 
  Basically, the same cause as "No. C1 - C8: Engine races up (slip) by

Page 4132 of 4264

ISUZU TF SERIES 2004  Workshop Manual 7A2-140   DIAGNOSIS (JR405E) 
STALL TEST 
CAUTION: 
Because A/T may break down, do not perform the stall test continuously. 
  
 Procedure 
1. Chock the four wheels. 
2. Warm up the engine. 
3. Apply

Page 4133 of 4264

ISUZU TF SERIES 2004  Workshop Manual DIAGNOSIS (JR405E)  7A2-141 
LINE PRESSURE TEST 
  Procedure 
1. Chock the four wheels. 
2. Remove the test plug of the transmission case and fit the oil 
pressure gauge. 
3. Warm up the engine. 
4. A

Page 4134 of 4264

ISUZU TF SERIES 2004  Workshop Manual 7A2-142   DIAGNOSIS (JR405E) 
1. Oil Cooler Out
2. R Range Line Pressure Detection Port
   (Low & Reverse Brake Pressure Detection Port)
3. D, 3, 2 & L Range Line Pressure Detection Port
    (Low Clut

Page 4135 of 4264

ISUZU TF SERIES 2004  Workshop Manual DIAGNOSIS (JR405E)  7A2-143 
TIME LAG TEST 
  Procedure 
1. Chock the four wheels. 
2. Warm up the engine. 
3. Apply the parking brake. 
4. Step on the foot brake fully. 
5. Set the select lever from

Page 4136 of 4264

ISUZU TF SERIES 2004  Workshop Manual 7A2-144   DIAGNOSIS (JR405E) 
TEST DRIVE 
 
 
 
 
  NOTE: 
Perform the test at normal operation ATF temperature 50 - 
80
 C. 
Drive the vehicle on level ground so as not to change to 
up and down