Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 1847

7A2-4 DIAGNOSIS

PAGE

NO. D3: GEAR SHIFT POINT IS LOW OR HIGH AT ALL POINT. . . . . . . . . 7A2-121
NO. D4: GEAR SHIFT POINT IS LOW OR HIGH AT LIMITED POINT . . . . . . . 7A2-121
NO. D5: NO KICK-DOWN. . . . . . . . . . . . . . . . . . . . . . . .. 7A2-121
NO. E1: NO GEAR SHIFT. . . . . . . . . . . . . . . . . . . . . . . .. 7A2-122
NO. E2: ONLY 4TH GEAR (O/D) IS NOT SELECTABLE . . . . . . . . . . . . 7A2-125
NO. E3: GEAR IS SHIFTED 2ND TO 3RD IN 2 RANGE . . . . . . . . . . . ... 7A2-128
NO. E4: GEAR IS SHIFTED 1ST TO 2ND IN L RANGE. . . . . . . . . . . . 7A2-128
NO. E5: GEAR IS SHIFTED 3RD TO 4TH IN 3 RANGE. . . . . . . . . . . . 7A2-128
NO. F1: LOW MAXIMUM SPEED OR POOR ACCELERATION . . . . . . . . ... 7A2-129
NO. F2: ENGINE RACES UP DURING ACCELERATION (SLIP) . . . . . . . . . 7A2-132
NO. F3: NOISE OR VIBRATION DURING THE RUNNING IN R, D, 3, 2 OR L RANGE7A2-132
NO. F4: ENGINE BRAKE DOES NOT APPLY IN L RANGE. . . . . . . . . . . 7A2-132
NO. F5: ENGINE STALLS BEFORE VEHICLE STOPS FROM RUNNING. . . . ... 7A2-133
NO. G1: VEHICLE MOVES IN P RANGE OR PARKING GEAR IS NOT
DISENGAGED OTHER THAN P RANGE . . . . . . . . . . . . . . . . . . 7A2-133
NO. G2: CREEP FORCE IS LARGE. . . . . . . . . . . . . . . . . . . .. 7A2-133
NO. G3: CREEP FORCE IS SMALL. . . . . . . . . . . . . . . . . . . .. 7A2-134
NO. G4: LARGE NOISE DURING IDLING WITH THE VEHICLE IN STOP STATE. .. 7A2-135
NO. H1: JUDDER OCCURS AT THE LOCK-UP . . . . . . . . . . . . . . ... 7A2-135
NO. H2: LARGE LOCK-UP SHOCK. . . . . . . . . . . . . . . . . . . .. 7A2-135
NO. H3: LOCK-UP POINT IS HIGH OR LOW . . . . . . . . . . . . . . . ... 7A2-135
NO. I1: NO LOCK-UP . . . . . . . . . . . . . . . . . . . . . . . . . 7A2-135
NO. J1: OIL LEAKS FROM BREATHER. . . . . . . . . . . . . . . . . ... 7A2-136
NO. J2: OIL LEAKS BETWEEN ENGINE AND CONVERTER HOUSING. . . . . 7A2-138
NO. J3: OIL LEAKS BETWEEN MAIN CASE AND CONVERTER HOUSING. . . .. 7A2-138
NO. J4: OIL LEAKS BETWEEN MAIN CASE AND REAR HOUSING . . . . . . .. 7A2-138
NO. J5: OIL LEAKS FROM OIL PAN . . . . . . . . . . . . . . . . . . . 7A2-138
NO. J6: OIL LEAKS FROM MANUAL SHAFT OIL SEAL . . . . . . . . . . . . 7A2-138
NO. J7: OIL LEAKS FROM OIL COOLER PIPE JOINT. . . . . . . . . . . . 7A2-138
NO. Z1: TRANSMISSION OVERHEAT. . . . . . . . . . . . . . . . . . .. 7A2-138
NO. Z2: MODE LAMP (POWER DRIVE OR 3RD START) DOES NOT LIGHT UP
WHEN THE POWER MODE OR 3RD START MODE IS TURNED ON. . . . . . 7A2-139

DIAGNOSIS 7A2-5

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NO. Z3: MODE LAMP (POWER DRIVE OR 3RD START) LIGHTS UP WHEN
THE POWER MODE OR 3RD START MODE IS TURNED OFF. . . . . . . . .. 7A2-139
NO. Z4: OIL TEMPERATURE WARNING LAMP LIGHTS UP . . . . . . . . . .. 7A2-139
NO. Z5: SELECT LEVER FEELING IS FAULTY. . . . . . . . . . . . . . . .. 7A2-139
NO. Z6: POOR FUEL CONSUMPTION . . . . . . . . . . . . . . . . . . . 7A2-140
NO. Z7: PATTERN SELECT SWITCH IS FAULTY. . . . . . . . . . . . . . 7A2-140
NO. Z8: OIL IS SPLASHED DURING THE RUNNING . . . . . . . . . . . . .. 7A2-140
NO. Z9: ABNORMAL SMELL . . . . . . . . . . . . . . . . . . . . . . 7A2-140
NO. Z10: ATF QUANTITY IS LOW OR HIGH. . . . . . . . . . . . . . . . 7A2-140
NO. Z11: ABNORMAL OIL PRESSURE. . . . . . . . . . . . . . . . . . 7A2-141
NO. Z12: REVERSE BUZZER DOES NOT RING. . . . . . . . . . . . . . .. 7A2-141
STALL TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7A2-142
LINE PRESSURE TEST. . . . . . . . . . . . . . . . . . . . . . . . . 7A2-143
TIME LAG TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7A2-145
TEST DRIVE. . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 7A2-146
SHIFT POINT CHART . . . . . . . . . . . . . . . . . . . . . . . . . 7A2-149
SHIFT POINT DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . 7A2-151
TCM VOLTAGE CHECK . . . . . . . . . . . . . . . . . . . . . . . . 7A2-156

7A2-6 DIAGNOSIS

BASIC TROUBLE SHOOTING

Transmission fluid pressure together with clutch and brake friction and other important transmission functions are
controlled by electrical signal from the Transmission Control Module (TCM).
Random diagnosis can produce inaccurate and misleading indications. It is important that diagnosing procedure be
carried out systematically.
Carefully follow the sequence outlined below to diagnose automatic transmission assembly.

Verify Customer Complain

Preliminary Check

(Visual Check/Test Drive)

Compare to Same Model

(If Available)

Check Service Bulletin

DTC Check

(Self-diagnosis/Tech 2)

Go to Symptom Diagnosis

Stall Test

Line Pressure Test

Transmission Overhaul

Repair & Verify Fix

Transmission Overhaul

Transmission Overhaul

Go to DTC Chart

Go to Intermittent Diagnosis

NG

Follow the instructions

NG

No Instruction

NG

OK

NO DTC

Not Solved

OK

OK

Follow the Bulletin

(Once Clear Memory) Restored

Not Stored

Use Service Programming

System (SPS)

Not Solved

DIAGNOSIS 7A2-7

CHECK TRANS INDICATOR & SELF DIAGNOSIS

CHECK

TRANS

Warning to the driver

•

"CHECK TRANS" is ON during 3 seconds at key switch ON

position.

•

When trouble has occurred to electrical components,

"CHECK TRANS" lamp is blinked (1.25 Hz) even during

driving to warn the driver.

•

The trouble is recorded by trouble code in TCM. When

temporary trouble code has been canceled, the "CHECK

TRANS" lamp stops blinking. This blinking can be stopped

by setting the key off. But the trouble code remains

memorized in TCM.

Key SW ON

ON

OFF

3 Sec.
(Lamp Check)

Illumination Pattern at Normal Condition

NOTE:

1. If the "CHECK TRANS" lamp is staying ON always at key

switch ON position, this means that connection between the

lamp and TCM is shorted to ground.

Verify connection and wire between the TCM A20 terminal

and lamp short to ground.

2. If the "CHECK TRANS" lamp is staying OFF at key switch

ON position (Engine off), this means that connection

between the lamp and TCM is opened or meter fuse C5

(15A) is burnt out.

Verify connection and wire between the TCM A20 terminal

and lamp open circuit and meter fuse C5 (15A).

Key SW ON 0.4 Sec.

ON

OFF

3 Sec. 3.2 Sec. 0.4 Sec.
(Lamp Check)

Illumination Pattern at Trouble Condition

Off Acc On V Acc

CHECK TRANS

Meter

Meter Fuse C5 (15A)

Fuse Box & Relay Box

(Cabin)

TCM