2000 SUZUKI SWIFT automatic transmission

AUTOMATIC TRANSMISSION (4 A/T) 7B-49
DTC P0763 (DTC NO.43) SHIFT SOLENOID-C (NO.3) ELECTRICAL
DTC P0768 (DTC NO.45) SHIFT SOLENOID-B (NO.4) ELECTRICAL
DTC P0773 (DTC NO.48) SHIFT SOLENOID-E (NO.5) ELECTRICAL
1. Dropping resistor 4. Shift solenoid-D (No.4) 7. TCM coupler (viewed from harness side)
2. solenoid coupler 5. Shift solenoid-E (No.5)
3. Shift solenoid-C (No.3) 6. TCM
12V
C44-24
C44-13
C44-12
C44-11
C44-25
C44-26
C44-15
1
6
23
4
5
BRN/WHTGRY/BLU
RED/BLU
BLU/ORN
BRN
BLK/YEL
BRN/WHT
BLK/YEL
BRN
BLK
RED
YEL
BRN
7
DTC DETECTING CONDITION
Solenoid output voltage too high or too low differently from TCM order.
Step Action Yes No
1 1) Turn ignition switch OFF and disconnect sole-
noid coupler.
2) Measure resistance between terminal of sole-
noid coupler and transmission ground. (See
figure.)
Is it 2.5 – 3.5 Ω
?Go to Step 2.Solenoid lead wire open or
shorted to ground.
Malfunction of solenoid
valve.
2 1) Disconnect TCM couplers.
2) Measure resistance between terminal of dis-
connected body side solenoid coupler and
terminal “C44-11”, “C44-12” or “C44-13” of
disconnected harness side TCM coupler.
(See chart.)
Is it 6.5 – 8.5 Ω
?Go to Step 3. Inspect dropping resister refer-
ring to “DROPPING RESIS-
TOR” in this section.
If OK, circuit between TCM
and dropping resister or drop-
ping resister and solenoid cou-
pler open.
3 Check continuity between terminal “C44-24”,
“C44-25” or “C44-26” of disconnected TCM cou-
pler and terminal of disconnected body side sole-
noid coupler. (See chart.)
Is there continuity?Go to Step 4. Circuit between TCM and sole-
noid coupler open.

7B-50 AUTOMATIC TRANSMISSION (4 A/T)
Chart for Step 2
Chart for Step 3
Chart for Step 5
Figure for Step 1 and 54 Check continuity between terminal of discon-
nected body side solenoid coupler and transmis-
sion ground with TCM, dropping resister and
solenoid couplers disconnected.
Is there continuity?Circuit between
TCM and transmis-
sion shorted to
ground.Go to Step 5.
5 Check continuity between terminal of discon-
nected body side dropping resistor coupler and
transmission ground. (See chart.)
Is there continuity?Circuit between
TCM and dropping
resister is shorted
to ground.Intermittent trouble or faulty
TCM.
Check for intermittent referring
to “INTERMITTENT AND
POOR CONNECTION” in Sec-
tion 0A. If no trouble found,
substitute a known-good TCM
and recheck.
Solenoid TCM terminal No.Solenoid coupler lead wire color
(body side)
C (No.3) C44-11 BRN
D (No.4) C44-12 BLK/YEL
E (No.5) C44-13 BRN/WHT
Solenoid TCM terminal No.Solenoid coupler lead wire color
(body side)
C (No.3) C44-24 BRN
D (No.4) C44-25 BLK/YEL
E (No.5) C44-26 BRN/WHT
Solenoid TCM terminal No.Dropping resistor lead wire color
(body side)
C (No.3) C44-11 GRY/BLU
D (No.4) C44-12 RED/BLU
E (No.5) C44-13 BLU/ORN
1. Solenoid coupler
2. Terminal for shift solenoid-C (No.3)
3. Terminal for shift solenoid-D (No.4)
4. Terminal for shift solenoid-E (No.5)
5. Transmission range sensor (Shift switch)
6. Dropping resistor terminal for shift solenoid-C (No.3)
7. Dropping resistor terminal for shift solenoid-D (No.4)
8. Dropping resistor terminal for shift solenoid-E (No.5)
9. Dropping resistor coupler
Step Action Yes No

AUTOMATIC TRANSMISSION (4 A/T) 7B-51
DTC P1709 (DTC NO.51) ENGINE COOLANT TEMPERATURE/BAROMETRIC PRESSURE
SIGNAL CIRCUIT
1. ECM 3. TCM coupler (viewed from harness side)
2. TCM 4. ECM coupler (viewed from harness side)
DTC DETECTING CONDITION
Engine coolant temperature/barometric pressure signal voltage too low although A/T fluid temperature is
normal operating temperature and engine rev. is standard.
Step Action Yes No
1 Check DTC referring to “ENGINE DIAGNOSIS”
in Section 6.
Is any DTC detected?Inspect and repair refer-
ring to DTC flow table in
Section 6.Go to Step 2.
2 1) Turn ignition switch OFF and disconnect
TCM and ECM couplers.
2) Measure resistance between terminal “C44-
18” of disconnected harness side TCM cou-
pler and body ground.
Is it infinity?Go to Step 3.“WHT/BLK” wire shorted
to ground.
3 1) Turn ignition switch OFF and connect TCM
couplers.
2) Turn ignition switch ON and check voltage
between terminal “C44-18” and body
ground.
Is it 0V?Substitute a known-good
TCM and recheck.Substitute a know-good
ECM and recheck.

7B-52 AUTOMATIC TRANSMISSION (4 A/T)
DTC P0702/P1702 (DTC No.52)TRANSMISSION CONTROL SYSTEM ELECTRICAL OR
INTERNAL MALFUNCTION OF TCM
1. TCM 3. A/T relay
2. Ignition switch 4. TCM coupler (viewed from harness side)
DTC DETECTING CONDITION
Relay output voltage too high although TCM orders the relay to turn OFF or relay output voltage too low
although TCM orders the relay to turn on.
Incorrect calculations of checking TCM programmed data indicated.
Step Action Yes No
1 1) Turn ignition switch ON.
2) Erase all DTCs referring to “HOW TO
CLEAR DTC” in this section.
3) Turn ignition switch OFF.
4) Turn ignition switch ON once again and
check for any DTC.
Is it DTC P1702 (DTC No.52) or P0702 (DTC
No.52)?Replace TCM. Could be a temporary
malfunction of the TCM.

AUTOMATIC TRANSMISSION (4 A/T) 7B-53
INSPECTION OF TCM AND ITS CIRCUITS
TCM and its circuits can be checked at TCM wiring couplers by
measuring voltage and resistance.
INSPECTION
1) Remove TCM from vehicle referring to “TRANSMISSION
CONTROL MODULE” in this section.
2) Connect TCM couplers to TCM.
3) Check voltage at each terminal of couplers connected.CAUTION:
TCM cannot be checked by itself, it is strictly prohibited
to connect voltmeter or ohmmeter to TCM with coupler
disconnected from it.
NOTE:
As each terminal voltage is affected by the battery volt-
age, confirm that it is 11 V or more when ignition switch
is ON.
1. TCM 3. Body ground
2. Couplers
TERMINAL CIRCUITSTAN-
DARD
VOLTAGECONDITION
C431 Transmission range “P” switch10 – 14 V IG switch ON, selector lever at “P” range
0 – 1 V IG switch ON, selector lever other than “P” range
2 Transmission range “R” switch10 – 14 V IG switch ON, selector lever at “R” range
0 – 1 V IG switch ON, selector lever other than “R” range
3 Transmission range “N” switch10 – 14 V IG switch ON, selector lever at “N” range
0 – 1 V IG switch ON, selector lever other than “N” range
4 Diagnosis switch 10 – 14 VIG switch ON, diagnosis switch terminal not
grounded
5 Engine speed signal 0 – 1 V IG switch ON, leaving engine OFF
6 Output shaft speed sensor(+)––
7 Input shaft speed sensor(+)––
8 throttle opening signal––
9 Transmission range “D” switch10 – 14 V IG switch ON, selector lever at “D” range
0 – 1 V IG switch ON, selector lever other than “D” range
10 Transmission range “2” switch10 – 14 V IG switch ON, selector lever at “2” range
0 – 1 V IG switch ON, selector lever other than “2” range
11 Transmission range “L” switch10 – 14 V IG switch ON, selector lever at “L” range
0 – 1 V IG switch ON, selector lever other than “L” range

7B-54 AUTOMATIC TRANSMISSION (4 A/T)
C4312Serial data link (SUZUKI scan
tool)10 – 14 V IG switch ON
13Output shaft speed sensor
shield––
14 Output shaft speed sensor(–)––
15 Input shaft speed sensor(–)––
C442 IG power source 10 – 14 V IG switch ON
3Transmission temperature
sensor0 – 4.5 V IG switch ON
4 Brake switch 10 – 14 V IG switch ON, brake pedal depressed
5 A/C compressor0 – 2 V A/C OFF
10 – 14 V A/C ON
8 Idle up signal10 – 14 V Selector lever at “P” or “N” range
0 – 1 V Selector lever other than “P” or “N” range
10 Shift solenoid-A (No.1) 0 – 1 V IG switch ON, select lever at “P” range
11Shift solenoid-C (Dropping
resistor)0 – 1 V IG switch ON, select lever at “P” range
12Shift solenoid-D (Dropping
resistor)10 – 14 V IG switch ON, select lever at “P” range
13Shift solenoid-E (Dropping
resistor)0 – 1 V IG switch ON, select lever at “P” range
15 Ground––
16Transmission temperature
sensor ground––
17 O/D off switch0 – 1 V IG switch ON, O/D off switch ON
10 – 14 V IG switch ON, O/D off switch OFF
18Engine coolant temperature/
Barometric pressure signal––
20 A/T failure serial data 0 – 1 V IG switch ON
21 O/D OFF lamp10 – 14 V IG switch ON, O/D off switch OFF
0 – 1 V IG switch ON, O/D off switch ON
22 Lock-up solenoid 0 – 1 V IG switch ON, selector lever at “P” range
23 Shift solenoid-B (No.2) 0 – 1 V IG switch ON, selector lever at “P” range
24 Shift solenoid-C (No.3) 0 – 1 V IG switch ON, selector lever at “P” range
25 Shift solenoid-D (No.4) 2.2 – 4.9 V IG switch ON, selector lever at “P” range
26 Shift solenoid-E (No.5) 0 – 1 V IG switch ON, selector lever at “P” range TERMINAL CIRCUITSTAN-
DARD
VOLTAGECONDITION

AUTOMATIC TRANSMISSION (4 A/T) 7B-55
ON-VEHICLE SERVICE
MAINTENANCE SERVICE
FLUID LEVEL AT NORMAL OPERATING TEMPERA-
TURE
INSPECTION
1) Stop vehicle and place it level.
2) Apply parking brake and place chocks against wheels.
3) With selector at P position, start engine.
4) Warm up engine till fluid temperature reaches normal oper-
ating temperature (70 – 80°C/158 – 176°F). As a guide to
check fluid temperature, warm up engine to normal operat-
ing temperature.
5) Keep engine idling and shift selector slowly to L and back to
P position.
6) With engine idling, pull out dipstick, wipe it off with a clean
cloth and put it back into place.
7) Pull out dipstick (1) again and check fluid level indicated on
it. Fluid level should be between FULL HOT and LOW HOT.
If it is below LOW HOT, add an equivalent of DEXRON
®-III
or DEXRON
®-IIE up to FULL HOT.
A/T fluid specification
: An equivalent of DEXRON
®-III or DEXRON®-IIE
NOTE:
 DO NOT RACE ENGINE while checking fluid level, even
after the engine start.
 DO NOT OVERFILL. Overfilling can cause foaming and
loss of fluid through breather. Then slippage and
transmission failure can result.
 Bringing the level from LOW HOT to FULL HOT
requires 0.35 liters (0.74/0.62 US/Imp. pt).
 If vehicle was driven under high load such as pulling a
trailer, fluid level should be checked about half an hour
after it is stopped.
2.“FULL HOT” mark
3.“LOW HOT” mark
4.“FULL COLD” mark
5.“LOW COLD” mark
1

7B-56 AUTOMATIC TRANSMISSION (4 A/T)
FLUID LEVEL AT ROOM TEMPERATURE
INSPECTION
The fluid level check at room temperature performed after repair
or fluid change before test driving is just preparation for level
check of normal operation temperature. The checking procedure
itself is the same as that described previously. If the fluid level is
between FULL COLD and LOW COLD, proceed to test drive. And
when the fluid temperature has reached the normal operating
temperature, check fluid again and adjust it as necessary.
FLUID CHANGE
1) Lift up vehicle.
2) When engine has cooled down, remove drain plug (1) from
oil pan and drain A/T fluid.
3) Install drain plug.
Tightening torque
A/T fluid drain plug (a) : 23 N·m (2.3 kg-m, 16.5 lb-ft)
1. Dipstick
2.“FULL HOT” mark
3.“LOW HOT” mark
4.“FULL COLD” mark
5.“LOW COLD” mark