Air SUZUKI SWIFT 2000 1.G RG413 Service Owners Manual

ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-5
SYSTEM CHECK FLOW TABLE
Step Action Yes No
1 1) Record details of the problem (failure, complaint) and how it
occurred as described by the customer.
For this purpose, use of such a questionnaire from as shown
below will facilitate collecting information to the point required for
proper analysis and diagnosis.
2) Check if what the customer claimed in “CUSTOMER QUES-
TIONNAIRE” is actually found in the vehicle and if that symptom
is found, whether it is identified as a failure.
(This step should be shared with the customer if possible.)
3) Check malfunction indicator lamp (“EPS” warning lamp) opera-
tion referring to “MALFUNCTION INDICATOR LAMP (“EPS”
LIGHT) CHECK”.
4) Check DTC referring to “DTC CHECK” in this section and record
the DTC(s).
5) Clear DTC if any malfunction DTC exists referring to “DTC
CLEARANCE” in this section, then recheck DTC.
Is any malfunction DTC detected?Go to Step 2. Go to Step 3.
2 1) Inspect and repair referring to applicable “DTC TABLE” in this
section.
2) Clear DTC referring to “DTC CLEARANCE” in this section.
Does the trouble recur?Go to Step 5. Go to Step 4.
3 1) Test drive the vehicle and turn steering wheel fully to the right
and left during test driving. See WARNING. Check if any trouble
exists.
2) Inspect and repair basic parts referring to “DIAGNOSIS CHART”
in SECTION 3.
3) If the trouble cannot be repaired in Step 3-2), inspect and repair
referring to “TROUBLE DIAGNOSIS (FOR TROUBLE NOT INDI-
CATED BY ON-BOARD DIAGNOSTIC SYSTEM)” in this sec-
tion.
Does the trouble recur?Go to Step 5. Go to Step 4.
4 1) Confirm that the problem symptom has gone and P/S system is
free from any abnormal conditions. If what has been repaired is
related to the malfunction DTC, clear the DTC once and perform
test driving as in Step 3-1) and confirm that no DTC is indicated.
Is any malfunction DTC detected?Go to Step 5. END
5 1) Check DTC referring to “DTC CHECK” in this section.
Is any malfunction DTC detected?Go to Step 2. Go to Step 3.
WARNING:
Carry out test in very little traffic area to prevent an accident.

ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-7
CUSTOMER QUESTIONNAIRE (EXAMPLE)
MALFUNCTION INDICATOR LAMP
(“EPS” WARNING LAMP) CHECK
1) Turn ignition switch to ON position (but without running
engine), check that malfunction indicator lamp (“EPS” warn-
ing lamp) lights up. If lamp does not light up, go to “TABLE
A”. If lamp flashes, go to “TABLE B”.
2) Start engine and check that malfunction indictor lamp
(“CHECK ENGIE” light) turns OFF.
If lamp comes OFF, P/S system is in good condition.

ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-11
Fig. for Step 4
DTC TABLE
3 1) Check if communication is possible by trying
communication with other controller
(ECM, ABS hydraulic unit/control module
assembly (if equipped) or SDM).
Is it possible to communicate with other control-
ler?Go to Step 4. Repair open in common
section of serial data cir-
cuit (“BLU” wire circuit)
used by all controllers or
short to ground or power
circuit which has occurred
somewhere in serial data
circuit (“BLU” wire circuit).
4 1) With ignition switch is OFF position, discon-
nect 8-pin (“G24”) connector from P/S con-
trol module.
2) Check proper connection at “G24-3” (“BLU”
wire) terminal for serial data circuit.
3) If OK, then check resistance between “G24-
3” (“BLU” wire) terminal and “BLU” wire ter-
minal for serial data circuit in DLC.
Is resistance 1 Ω or less?Substitute a known-good
P/S control module and
recheck.Repair high resistance or
open in “BLU” wire circuit
for P/S system. Step Action Yes No
1. DLC
2.“BLU” wire terminal
CAUTION:
Be sure to perform “SYSTEM CHECK FLOW TABLE” before starting diagnosis according to flow table
of each DTC.
21
3.0
0.3
0.30.3 0.31.0 3.03.0 21 21
Example : When VSS circuit fail (DTC 1121, DTC No.21) is set
“EPS” lightTurn ON
Turn OFF
TIME
(sec.)

ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-17
DTC C1114 (DTC No.14) TORQUE SENSOR 5V POWER SUPPLY CIRCUIT FAIL-
URE
Fig. for Step 2
1. To main fuse 4.“IG METER” fuse (15A) in fuse box 7. Connector “G24”
2. Ignition switch 5. P/S control module 8. Connector “G24-1”
3.“P/S” fuse (30A) in fuse box 6. Torque sensor
G24-1
G24-8G24-2
7
G24-1-5
G24-1-4 G24-1-3 G24-1-2 G24-1-18
G24-2 G24-1
G24-8G24-1-4G24-1-3
G24-1-5G24-1-2G24-1-1
1
23
45
6
BLK/WHT BLK/RED
BLK WHTYEL BLK BLU RED
Step Action Yes No
1Was “SYSTEM CHECK FLOW TABLE” per-
formed?Go to STEP 2. Go to “SYSTEM CHECK
FLOW TABLE”.
2 1) Remove steering column hole cover.
2) Check proper connection for 5-terminals
connector (“G24-1”) to P/S control module.
3) If OK, turn ignition switch ON.
4) Check voltage between “G24-1-2” (“BLU”
wire) terminal of 5-terminals connector
(“G24-1”) and body ground with connector
(“G24-1”) connected to P/S control module.
Is it about 5 V?Go to STEP 3. Repair high resistance,
open or short to power cir-
cuit or ground in 5V power
supply (“BLU” wire) cir-
cuit.
3 1) Check torque sensor and its circuit. Refer to
“TORQUE SENSOR”.
Is torque sensor in good condition?Substitute a known-good
P/S control module and
recheck.Replace steering column
assembly and recheck.

3B1-18 ELECTRICAL POWER STEERING (P/S) SYSTEM
DTC C1116 (DTC No.16) TORQUE SENSOR 8V POWER SUPPLY CIRCUIT FAIL-
URE
Fig. for Step 2
1. To main fuse 4.“IG METER” fuse (15A) in fuse box 7. Connector “G24”
2. Ignition switch 5. P/S control module 8. Connector “G24-1”
3.“P/S” fuse (30A) in fuse box 6. Torque sensor
G24-1
G24-8G24-2
7
G24-1-5
G24-1-4 G24-1-3 G24-1-2 G24-1-18
G24-2 G24-1
G24-8G24-1-4 G24-1-3
G24-1-5 G24-1-2 G24-1-1
1
23
45
6
BLK/WHTBLK/RED
BLK WHTYEL BLK BLU RED
Step Action Yes No
1Was “SYSTEM CHECK FLOW TABLE” per-
formed?Go to STEP 2. Go to “SYSTEM CHECK
FLOW TABLE”.
2 1) Remove steering column hole cover.
2) Check proper connection for 5-terminals
connector (“G24-1”) to P/S control module.
3) If OK, turn ignition switch ON.
4) Measure voltage between “G24-1-1” (“RED”
wire) terminal of 5-terminals connector
(“G24-1”) and body ground with connector
(“G24-1”) connected to P/S control module.
Is it about 8 V?Go to STEP 3. Repair high resistance,
open or short to power cir-
cuit or ground in 8V power
supply (“RED” wire) cir-
cuit.
3 1) Check torque sensor and its circuit. Refer to
“TORQUE SENSOR”.
Is torque sensor in good condition?Substitute a known-good
P/S control module and
recheck.Replace steering column
assembly and recheck.

ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-19
DTC C1121/C1123/C1124 (DTC No.21/23/24) VSS CIRCUIT FAILURE
Fig. for Step 2
1. To main fuse 5.“EPS” warning lamp 9. P/S control module
2. Ignition switch 6. Speedometer 10. Connector “G24”
3.“P/S” fuse (30A) in fuse box 7. Combination meter
4.“IG METER” fuse (15A) in fuse box 8. To VSS
G24-2 G24-1
G24-8
G24-7 G24-5 1
23
4
5
67
89
BLK/WHT
BLK/WHTBLK/RED
YEL
PPL VBLK
G24-1
G24-5
G24-7G24-8G24-2
10
Step Action Yes No
1Was “SYSTEM CHECK FLOW TABLE” performed? Go to STEP 2. Go to “SYSTEM
CHECK FLOW TABLE”.
2 1) Ignition switch OFF.
2) Remove steering column lower cover.
3) Disconnect 8-terminals connector (“G24”) from
P/S control module.
4) Check proper connection to P/S control module
at “G24-7” (“PPL” wire) terminal.
5) If OK, connect voltmeter between “G24-7”
(“PPL” wire) terminal and body ground with con-
nector (“G24”) connected.
6) Hoist rear end of vehicle and lock rear right tire.
7) Turn rear left tire quickly with ignition switch ON.
Does voltmeter indicate deflection between 0 – 1 V
and 9 – 11 V a few times while tire is turned one
revolution?Check intermittent trou-
ble. Refer to “INTER-
MITTENT TROUBLE”
in SECTION 0A.
If OK, substitute a
known-good P/S control
module and recheck.Repair VSS or its (“PPL”
wire) circuit.

3B1-20 ELECTRICAL POWER STEERING (P/S) SYSTEM
DTC C1122 (DTC No.22) ENGINE SPEED SIGNAL CIRCUIT FAILURE
1. To main fuse 4.“IG METER” fuse (15A) in fuse box 7. Connector “G24”
2. Ignition switch 5. ECM
3.“P/S” fuse (30A) in fuse box 6. P/S control module
G24-2 G24-1
G24-8
G24-6 1
23
4
56
BLK/WHT BLK/RED
BRNBLK
G24-1
G24-6
G24-8G24-2
7
Step Action Yes No
1Was “SYSTEM CHECK FLOW TABLE” per-
formed?Go to STEP 2. Go to “SYSTEM CHECK
FLOW TABLE”.
2 1) Recheck DTC with engine running.
Is DTC C1122 (DTC No.22) indicated?Go to STEP 3. It is nothing abnormal for
DTC C1122 (DTC No.22).
P/S system is in normal
condition.
3 1) Check proper connection to P/S control mod-
ule and ECM at each “BRN” wire terminal (P/
S control module side: “G24-6” terminal, ECM
side : Refer to in SECTION 6E), then check
intermittent trouble. Refer to “INTERMITTENT
TROUBLE” in SECTION 0A.
2) If they are OK, check high resistance, open or
short to power circuit or ground in “BRN” wire
circuit.
Is check result in good condition?Substitute a known-
good P/S control mod-
ule and recheck.Repair.

ELECTRICAL POWER STEERING (P/S) SYSTEM 3B1-21
DTC C1141/C1142/C1143/C1144/C1145 (DTC No.41/42/43/44/45) MOTOR CIR-
CUIT FAILURE
Fig. for Step 2
1. To main fuse 4.“IG METER” fuse (15A) in fuse box 7. Connector “G24”
2. Ignition switch 5. P/S control module 8. Connector “G24-1”
3.“P/S” fuse (30A) in fuse box 6. Motor and clutch
MG24-1
G24-8G24-2
7
G24-2-2
G24-2-4 G24-2-3 G24-2-1
8
G24-2 G24-1
G24-8G24-2-2
G24-2-1
G24-2-4
G24-2-3 1
23
46 5
BLK/WHTBLK/RED
BLKBLK BLK RED or BLK BLK or RED
Step Action Yes No
1Was “SYSTEM CHECK FLOW TABLE” per-
formed?Go to STEP 2. Go to “SYSTEM CHECK
FLOW TABLE”.
2 1) Remove steering column hole cover.
2) Check proper connection for 4-terminals con-
nector (“G24-2”) to P/S control module.
3) If OK, start engine.
4) Check voltage between “G24-2-2” (“BLK” wire
or “RED wire) terminal and body ground and
“G24-2-1” (“RED” wire or “BLK” wire) terminal
and body ground with connector (“G24-2”)
connected to P/S control module.
Are they 5 – 7 V with steering wheel held at posi-
tion for vehicle to run straight?Go to STEP 3. Repair poor connection,
high resistance, open or
short to power circuit or
ground in “G24-2” (“BLK”
wire or “RED” wire) or
“G24-2-1” (“RED” wire or
“BLK” wire) circuit.
3 1) Check motor and its circuit. Refer to “MOTOR
AND CLUTCH”.
Is motor and clutch in good condition?Substitute a known-
good P/S control module
and recheck.Replace steering column
assembly and recheck.

3B1-22 ELECTRICAL POWER STEERING (P/S) SYSTEM
DTC C1151 (DTC No.51) CLUTCH CIRCUIT FAILURE
1. To main fuse 4.“IG METER” fuse (15A) in fuse box 7. Connector “G24”
2. Ignition switch 5. P/S control module 8. Connector “G24-2”
3.“P/S” fuse (30A) in fuse box 6. Motor and clutch
M
G24-2 G24-1
G24-8G24-2-2
G24-2-1
G24-2-4
G24-2-3 1
23
46 5
BLK/WHTBLK/RED
BLKBLK BLK RED or BLKBLK or RED
G24-1
G24-8G24-2
7
G24-2-2
G24-2-4 G24-2-3 G24-2-1
8
Step Action Yes No
1Was “SYSTEM CHECK FLOW TABLE” per-
formed?Go to STEP 2. Go to “SYSTEM CHECK
FLOW TABLE”.
2 1) Remove steering column lower cover.
2) Check proper connection for 4-terminals
connector (“G24-2”) to P/S control module.
3) If OK, start engine.
4) Check voltage between “G24-2-4” (“BLK”
wire) terminal and body ground with con-
nector (“G24-2”) connected to P/S control
module.
Is it 0 V?Go to STEP 3. Repair poor connection,
high resistance, open or
short to power circuit or
ground in “G24-2-4”
(“BLK” wire) circuit.
3 1) Check voltage between “G24-2-3” (“BLK”
wire) terminal and body ground with con-
nector (“G24-2”) connected to P/S control
module.
Is it 10 – 14 V with steering wheel held at posi-
tion for vehicle to run straight?Go to STEP 4. Repair poor connection,
high resistance, open or
short to power circuit or
ground in “G24-2-3”
(“BLK” wire) circuit.
4 1) Check motor and its circuit. Refer to
“MOTOR AND CLUTCH”.
Is motor and clutch in good condition?Substitute a known-good
P/S control module and
recheck.Replace steering column
assembly and recheck.

3B1-24 ELECTRICAL POWER STEERING (P/S) SYSTEM
DTC C1153(DTC No.53) P/S CONTROL MODULE POWER SUPPLY CIRCUIT
FAILURE
Fig. for Step 2
DTC C1152/C1154/C1155 (DTC No.52/54/55) P/S CONTROL MODULE FAILURE
Substitute a known-good P/S control module and recheck.
1. To main fuse 3.“P/S” fuse (30A) in fuse box 5. P/S control module
2. Ignition switch 4.“IG METER” fuse (15A) in fuse box 6. Connector “G24”
G24-2 G24-1
G24-8 13
45
BLK/WHT BLK/RED
BLK
G24-1
G24-8G24-2
6
Step Action Yes No
1Was “SYSTEM CHECK FLOW TABLE” per-
formed?Go to STEP 2. Go to “SYSTEM CHECK
FLOW TABLE”.
2 1) Remove steering column lower cover.
2) Check “P/S” fuse and proper connection to
P/S control module at “G24-1” (“BLK/WHT”
wire) terminal.
3) If OK, check voltage between “G24-1” termi-
nal and body ground with connector (“G24”)
connected to P/S control module.
Is it 10 – 14 V?Check intermittent trou-
ble. Refer to “INTERMIT-
TENT TROUBLE” in
SECTION 0A.
If OK, substitute a known-
good P/S control module
and recheck.Repair poor connection or
high resistance in “G24-1”
(“BLK/RED” wire) circuit.