Starter SUZUKI SX4 2006 1.G Service Workshop Manual

Downloaded from www.Manualslib.com manuals search engine 1-ii Table of Contents
DTC P0123: Throttle Position Sensor (Main)
Circuit High ..................................................... 1A-89
DTC P0131 / P0132: O2 Sensor (HO2S)
Circuit Low Voltage / High Voltage (Sensor-
1) ..................................................................... 1A-92
DTC P0133: O2 Sensor (HO2S) Circuit Slow
Response (Sensor-1) ...................................... 1A-95
DTC P0134: O2 Sensor (HO2S) Circuit No
Activity Detected (Sensor-1) ........................... 1A-96
DTC P0137 / P0138: O2 Sensor (HO2S)
Circuit Low Voltage / High Voltage (Sensor-
2) ..................................................................... 1A-98
DTC P0140: O2 Sensor (HO2S) Circuit No
Activity Detected (Sensor-2) ......................... 1A-101
DTC P0171 / P0172: Fuel System Too Lean /
Rich ............................................................... 1A-103
DTC P0222: Throttle Position Sensor (Sub)
Circuit Low .................................................... 1A-105
DTC P0223: Throttle Position Sensor (Sub)
Circuit High ................................................... 1A-107
DTC P0300 / P0301 / P0302 / P0303 / P0304:
Random Misfire Detected / Cylinder 1 /
Cylinder 2 / Cylinder 3 / Cylinder 4 Misfire
Detected ........................................................ 1A-110
DTC P0327 / P0328: Knock Sensor Circuit
Low / High ..................................................... 1A-112
DTC P0335: Crankshaft Position (CKP)
Sensor Circuit ............................................... 1A-114
DTC P0340: Camshaft Position (CMP)
Sensor Circuit ............................................... 1A-116
DTC P0401 / P0402: Exhaust Gas
Recirculation Flow Insufficient Detected /
Excessive Detected ...................................... 1A-119
DTC P0403: Exhaust Gas Recirculation
Control Circuit ............................................... 1A-122
DTC P0420: Catalyst System Efficiency
below Threshold ............................................ 1A-124
DTC P0443: Evaporative Emission System
Purge Control Valve Circuit........................... 1A-126
DTC P0462 / P0463: Fuel Level Sensor
Circuit Low / High .......................................... 1A-128
DTC P0480: Fan 1 (Radiator Cooling Fan)
Control Circuit ............................................... 1A-129
DTC P0481: Cooling Fan 2 (A/C Condenser
Fan) Control Circuit ....................................... 1A-131
DTC P0500: Vehicle Speed Sensor (VSS)
Malfunction .................................................... 1A-134
DTC P0532: A/C Refrigerant Pressure
Sensor Circuit Low ........................................ 1A-136
DTC P0533: A/C Refrigerant Pressure
Sensor Circuit High ....................................... 1A-138
DTC P0601 / P0602 / P0607: Internal Control
Module Memory Check Sum Error / Control
Module Programming Error / Control Module
Performance ................................................. 1A-139
DTC P0616: Starter Relay Circuit Low............ 1A-140
DTC P0617: Starter Relay Circuit High ........... 1A-141
DTC P1510: ECM Back-Up Power Supply
Malfunction .................................................... 1A-143DTC P2101: Throttle Actuator Control Motor
Circuit Range / Performance ......................... 1A-144
DTC P2102: Throttle Actuator Control Motor
Circuit Low .................................................... 1A-146
DTC P2103: Throttle Actuator Control Motor
Circuit High.................................................... 1A-147
DTC P2111: Throttle Actuator Control System
- Stuck Open ................................................. 1A-148
DTC P2119: Throttle Actuator Control Throttle
Body Range / Performance ........................... 1A-149
DTC P2122: Pedal Position Sensor (Main)
Circuit Low Input ........................................... 1A-151
DTC P2123: Pedal Position Sensor (Main)
Circuit High Input........................................... 1A-153
DTC P2127: Pedal Position Sensor (Sub)
Circuit Low Input ........................................... 1A-155
DTC P2128: Pedal Position Sensor (Sub)
Circuit High Input........................................... 1A-158
DTC P2135: Throttle Position Sensor (Main /
Sub) Voltage Correlation ............................... 1A-160
DTC P2138: Pedal Position Sensor (Main /
Sub) Voltage Correlation ............................... 1A-163
DTC P2227 / P2228 / P2229: Barometric
Pressure Circuit Malfunction ......................... 1A-165
DTC U0073: Control Module Communication
Bus Off .......................................................... 1A-166
DTC U0101: Lost Communication with TCM .. 1A-166
DTC U0121: Lost Communication with ABS
Control Module .............................................. 1A-166
DTC U0140: Lost Communication with Body
Control Module .............................................. 1A-166
Troubleshooting for CAN-DTC ........................ 1A-167
Inspection of ECM and Its Circuits .................. 1A-172
ECM Power and Ground Circuit Check........... 1A-193
Fuel Injector Circuit Check .............................. 1A-196
Fuel Pump and Its Circuit Check..................... 1A-198
Fuel Pressure Check....................................... 1A-201
A/C Condenser Cooling Fan Control System
Inspection ...................................................... 1A-202
A/C System Circuits Check ............................. 1A-205
Electric Load Signal Circuit Check .................. 1A-209
Radiator Cooling Fan Control System Check . 1A-211
Repair Instructions ..........................................1A-212
Idle Speed and IAC Throttle Valve Opening
Inspection ...................................................... 1A-212
Special Tools and Equipment .........................1A-213
Special Tool .................................................... 1A-213
Aux. Emission Control Devices ............. 1B-1
Diagnostic Information and Procedures ............1B-1
EGR System Inspection (If Equipped) ................ 1B-1
Repair Instructions ..............................................1B-1
EVAP Canister Purge Inspection ........................ 1B-1
EVAP Canister Purge Valve and Its Circuit
Inspection .......................................................... 1B-1
Vacuum Passage Inspection............................... 1B-2
Vacuum Hose Inspection .................................... 1B-3
EVAP Canister Purge Valve Inspection .............. 1B-3
EVAP Canister Inspection ................................... 1B-4

Downloaded from www.Manualslib.com manuals search engine 1A-20 Engine General Information and Diagnosis:
1. Air cleaner 17. Radiator cooling fan 33. A/C switch (A/C model)
2. EVAP canister purge valve 18. A/C condenser cooling fan 34. A/C evaporator outlet air temp. sensor (manual A/C
model)
3. MAF and IAT sensor 19. Combination meter 35. Immobilizer coil antenna
4. TP sensor 20. BCM 36. Main relay
5. MAP sensor (if equipped) 21. Ignition switch37. Wheel speed sensor (VSS) (for M/T model)
6. EGR valve (if equipped) 22. Starter magnetic switch 38. Oil control valve
7. EVAP canister 23. Heated oxygen sensor (HO2S)-2 (if
equipped)39. ABS control module
8. Tank pressure control valve (built-in fuel pump) 24. DLC 40. Starting motor control relay
9. Fuel pump (with pressure regulator) 25. Electric load 41. A/C refrigerant pressure sensor (A/C model)
10. Ignition coil assembly 26. Fuel level sensor 42. APP sensor
11. Fuel injector 27. Brake light 43. Throttle actuator control relay
12. Heated oxygen sensor (HO2S)-1 28. Brake light switch 44. Throttle actuator
13. Knock sensor 29. ECM 45. TCM (for A/T model)
14. ECT sensor 30. Barometric pressure sensor 46. Output shaft speed sensor (VSS) (for A/T model)
15. CMP sensor 31. Battery
16. CKP sensor 32. A/C compressor relay (A/C model)

Downloaded from www.Manualslib.com manuals search engine 1A-34 Engine General Information and Diagnosis:
)
U*P0420Catalyst system efficiency below
thresholdOutput waveforms of HO2S-1 and HO2S-2 are similar.2 driving
cycles
)
U*P0443Evaporative emission system purge
control valve circuitMonitor signal of EVAP canister purge valve is different
from command signal. (circuit open or shorted to ground)2 driving
cycles
) P0462 Fuel level sensor circuit lowCircuit voltage of fuel level sensor is less than
specification.—
) P0463 Fuel level sensor circuit highCircuit voltage of fuel level sensor is more than
specification.—
)
U*P0480Fan 1 control circuitMonitor signal of radiator cooling fan relay is different from
command signal.1 driving
cycle
)
UP0481Fan 2 control circuitMonitor signal of A/C condenser cooling fan relay is
different from command signal.—
) *P0500 Vehicle speed sensor No VSS signal during fuel cut for specified time or longer.2 driving
cycles
) P0532A/C refrigerant pressure sensor
circuit lowOutput voltage of A/C refrigerant pressure sensor is less
than specification.—
) P0533A/C refrigerant pressure sensor
circuit highOutput voltage of A/C refrigerant pressure sensor is more
than specification.—
) *P0601Internal control module memory
check sum errorData write error or check sum error.1 driving
cycle
) P0602 Control module programming error Data programming error.1 driving
cycle
) *P0607 Control module performance Data programming error.1 driving
cycle
)
U*P0616Starter relay circuit lowStarter signal is low voltage even though engine is started
with vehicle at stop.2 driving
cycles
)
U*P0617Starter relay circuit highStarter signal is high voltage for specified time while
engine is running.2 driving
cycles
) *P1510
ECM backup power supply
malfunctionBackup power voltage is out of specification after starting
engine.1 driving
cycle
) *P2101Throttle actuator control motor
circuit range/performanceMonitor signal of throttle actuator output (duty output) is
inconsistent with throttle actuator control command.1 driving
cycle
) *P2102Throttle actuator control motor
circuit lowPower supply voltage of throttle actuator control circuit is
lower than specification even if throttle actuator control
relay turned on.1 driving
cycle
) *P2103Throttle actuator control motor
circuit highPower supply voltage of throttle actuator control circuit is
higher than specification even if throttle actuator control
relay turned off.1 driving
cycle
) *P2111Throttle actuator control system –
stuck openThrottle valve default opening is greater than 8° from
complementary closed position when diagnosing throttle
valve at ignition switch turned OFF.1 driving
cycle
) *P2119Throttle actuator control throttle
body range/performanceDifference between actual throttle valve opening angle
and opening angle calculated by ECM is more than
specification.1 driving
cycle
) *P2122Pedal position sensor (main) circuit
low inputOutput voltage of pedal position sensor (main) is lower
than specification.1 driving
cycle
) *P2123Pedal position sensor (main) circuit
high inputOutput voltage of pedal position sensor (main) is higher
than specification.1 driving
cycle
) *P2127Pedal position sensor (sub) circuit
low inputOutput voltage of pedal position sensor (sub) is lower
than specification.1 driving
cycle
) *P2128Pedal position sensor (sub) circuit
high inputOutput voltage of pedal position sensor (sub) is higher
than specification.1 driving
cycle
) *P2135Throttle position sensor (main / sub)
voltage correlationDifference between the opening angle based on throttle
position sensor (main) and the opening angle based on
throttle position sensor (sub) is more than specification.1 driving
cycle DTC No. Detecting itemDetecting condition
(DTC will set when detecting:)MIL

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-39
*) SHORT FT B1
(SHORT TERM FUEL TRIM)At specified idle speed after warming up –20 – +20%
*) LONG FT B1
(LONG TERM FUEL TRIM)At specified idle speed after warming up –20 – +20%
) TOTAL FUEL TRIM B1 At specified idle speed after warming up –35 – +35%
) FUEL CUTEngine at fuel cut condition ON
Engine at other than fuel cut condition OFF
) O2S B1 S2 ACT
(HEATED OXYGEN
SENSOR-2) (if equipped)At specified idle speed after warming up ACTIVE
) O2S B1 S1 ACT
(HEATED OXYGEN
SENSOR-1)At specified idle speed after warming up ACTIVE
*) CANIST PRG DUTY
(EVAP CANISTER PURGE
FLOW DUTY)At specified idle speed after warming up 0%
*) IGNITION ADVANCE
(IGNITION TIMING
ADVANCE FOR NO.1
CYLINDER)At specified idle speed with no load after warming up 5 – 15° BTDC
*) EGR VALVE OPENING (if
equipped) At specified idle speed after warming up 0%
) VVT GAP
(TARGET-ACTUAL
POSITION) (VVT model)At specified idle speed after warming up 0 – 3°
) FUEL PUMPWithin 2 seconds after ignition switch ON or engine
runningON
Engine at stop with ignition switch ON OFF
) STARTER SW
(STARTER SWITCH)Ignition switch is turned to ST (engine cranking)
positionON
) A/C PRESSURE
(A/C REFERIGERANT
ABSOLUTE PRESSURE)Engine runningA/C ON (A/C is operating) at
ambient temperature: 30 °C
(86 °F) and humidity: 50%1350 – 1650 kPa For more
details, refer to pressure of
high pressure gage under “A/C
System Performance
Inspection in Section 7B”.
A/C OFF (A/C is not
operating) at ambient
temperature: 30 °C (86 °F)
and engine coolant
temperature: 90 – 100 °C
(194 – 212 °F)600 – 1000 kPa After longer
than 10 min from A/C switch
turned off
) A/C SWITCHEngine running after warming up, A/C not operating OFF
Engine running after warming up, A/C operating ON
) A/C COMP RELAY Engine runningA/C switch and blower motor
switch turned ONON
A/C switch and blower motor
switch turned OFFOFF
) BLOWER FAN Ignition switch ON
Blower fan switch: 2nd
speed position or moreON
Blower fan switch: under 1st
speed positionOFF
) ELECTRIC LOADIgnition switch ON / Headlight, small light, all turned
OFFOFF
Ignition switch ON / Headlight, small light, all turned
ONON Scan tool data Vehicle conditionNormal condition /
reference values

Downloaded from www.Manualslib.com manuals search engine 1A-42 Engine General Information and Diagnosis:
CANIST PRG DUTY (EVAP CANISTER PURGE FLOW
DUTY, %)
This parameter indicates valve ON (valve open) time
rate within a certain set cycle of EVAP canister purge
valve which controls the amount of EVAP purge.
IGNITION ADVANCE (IGNITION TIMING ADVANCE
FOR NO.1 CYLINDER, °)
Ignition timing of No.1 cylinder is commanded by ECM.
The actual ignition timing should be checked by using
the timing light.
EGR VALVE OPENING (%)
This parameter indicates opening rate of EGR valve
which controls the amount of EGR flow.
VVT GAP (TARGET-ACTUAL POSITION, °) (VVT
model)
It is calculated using the formula: target valve timing
advance – actual valve timing advance.
FUEL PUMP (ON/OFF)
ON is displayed when ECM activates the fuel pump via
the fuel pump relay switch.
STARTER SW (STARTER SWITCH, ON/OFF)
This parameter indicates condition of starting motor relay
output.
ON: Starting motor relay is ON
OFF: Starting motor relay is OFF
A/C PRESSURE (A/C REFRIGERANT ABSOLUTE
PRESSURE, kPa)
This parameter indicates A/C refrigerant absolute
pressure calculated by ECM.
A/C SWITCH (ON/OFF)
ON: Command for A/C operation being output from ECM
to HVAC.
OFF: Command for A/C operation not being output.
A/C COMP RELAY (A/C COMPRESSOR RELAY, ON/
OFF)
This parameter indicates the state of the A/C switch.
BLOWER FAN (ON/OFF)
This parameter indicates the state of the blower fan
motor switch.
ELECTRIC LOAD (ON/OFF)
ON: Headlight or small light ON signal inputted.
OFF: Above electric loads all turned OFF.
RADIATOR COOLING FAN (RADIATOR COOLING
FAN CONTROL RELAY, ON/OFF)
ON: Command for radiator cooling fan control relay
operation being output.
OFF: Command for relay operation not being output.A/C COND FAN (A/C CONDENSER COOLING FAN
CONTROL RELAY, ON/OFF)
ON: Command for A/C condenser cooling fan control
relay operation being output.
OFF: Command for relay operation not being output.
TP SENSOR 1 VOLT (THROTTLE POSITION SENSOR
(MAIN) OUTPUT VOLTAGE, V)
The Throttle Position Sensor (Main) reading provides
throttle valve opening information in the form of voltage.
TP SENSOR 2 VOLT (THROTTLE POSITION SENSOR
(SUB) OUTPUT VOLTAGE, V)
The Throttle Position Sensor (Sub) reading provides
throttle valve opening information in the form of voltage.
APP SENSOR 1 VOLT (ACCELERATOR PEDAL
POSITION (APP) SENSOR (MAIN) OUTPUT
VOLTAGE, V)
The Accelerator Pedal Position (APP) Sensor (Main)
reading provides accelerator pedal opening information
in the form of voltage.
APP SENSOR 2 VOLT (ACCELERATOR PEDAL
POSITION (APP) SENSOR (SUB) OUTPUT VOLTAGE,
V)
The Accelerator Pedal Position (APP) Sensor (Sub)
reading provides accelerator pedal opening information
in the form of voltage.
ACCEL POSITION (RELATIVE ACCELERATOR
PEDAL POSITION, %)
When accelerator pedal is at fully released position,
accelerator pedal is indicated as 0 – 3% and 90 – 100%
fully depressed position.
TARGET THROTTLE POSI (TARGET THROTTLE
VALVE POSITION, %)
Target Throttle Valve Position is ECM internal parameter
which indicates the ECM requested throttle valve
position.
IAC THROTTLE OPENING (IDLE AIR (SPEED)
CONTROL THROTTLE VALVE OPENING, %)
This parameter indicates throttle valve opening of idle air
control in %.
(100% indicates the maximum idle air flow.)
THROTTLE MOTOR VOLT (V)
This parameter indicates power supply voltage of throttle
actuator (motor) control circuit (input voltage from
throttle actuator control relay).
CLOSED THROTTLE POS (CLOSED THROTTLE
POSITION, ON/OFF)
This parameter reads ON when throttle valve is fully
closed, or OFF when it is not fully closed.

Downloaded from www.Manualslib.com manuals search engine 1A-116 Engine General Information and Diagnosis:
DTC P0340: Camshaft Position (CMP) Sensor CircuitS6RW0D1104042
Wiring Diagram5Ground circuit check
1) Turn ignition switch to OFF position.
2) Measure resistance between “BLK/ORN” wire terminal
of CKP sensor connector and engine ground.
Is measured resistance value less than 3
Ω?Go to Step 6. “BLK/ORN” wire is open
or high resistance.
6Was terminal “B+” voltage in Step 3 within specification?Go to Step 7. “BLK/RED” wire is open
circuit. If wire and
connection are OK,
substitute a known-
good ECM and recheck.
7Engine start signal check
1) Check starting motor circuit for opening and short
referring to Step 2 of “DTC P0616: Starter Relay Circuit
Low” and Step 3 and 4 of “DTC P0617: Starter Relay
Circuit High”.
Is check result satisfactory?Go to Step 8. Repair or replace.
8CKP sensor check
1) Check CKP sensor and sensor plate tooth referring to
“Camshaft Position (CMP) Sensor Inspection in Section
1C”.
Is check result satisfactory?Substitute a known-
good ECM and recheck.Replace CKP sensor
and/or sensor plate. Step Action Yes No
E01C01
3 4
18 19 5 6 7 10 11
17 20
47 46 49 50 51 21 22
5216 259
24 14
29
55 57 54 53 59
60 582
26 27 28 15
30
56 4832 31 34 35 36 37 40 42 39 38 44
45 43 41 331 12 13
238 3 4
18 19 5 6 7 10 11
17 20
47 46 49 50 51 21 22
5216 259
24 14
29
55 57 54 53 59
60 582
26 27 28 15
30
56 4832 31 34 35 36 37 40 42 39 38 44
45 43 41 331 12 13
238
12V
5VBLK/REDBLK/RED
BLK/RED
BLK/YELBLK/YEL
BLK/YEL
BRN/WHT
5
64 83
E01-29
E01-1
E01-60
C01-58
C01-15 C01-30
BLK/ORN
BLKBLK
7BLK/REDE01-16
BLK/ORN
1
10
C01-20 5V
GRNBLK/WHT
9
WHT
*E01-31 BLK
2
RED/YEL
I6RW0D110032-02
1. CMP sensor 3. ECM 5. Ignition switch 7. “FI” fuse 9. “IGN” fuse
2. Signal rotor 4. Main relay 6. Main fuse box 8. “IG COIL” fuse 10. To CKP sensor

Downloaded from www.Manualslib.com manuals search engine 1A-140 Engine General Information and Diagnosis:
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.

DTC P0616: Starter Relay Circuit LowS6RW0D1104054
Wiring DiagramStep Action Yes No
1DTC recheck
1) Clear DTC referring to “DTC Clearance”.
2) Turn OFF ignition switch.
3) Turn ON ignition switch and check DTC.
Is DTC P0601 or P0607 still indicated?Go to Step 2. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
2ECM reprogramming check
Was reprogramming of ECM executed?Execute reprogramming
of ECM correctly once
again.Go to step 3.
3ECM power and ground circuit check
1) Check that ECM power supply circuit and ECM ground
circuit is in good condition referring to “ECM Power and
Ground Circuit Check”.
Are check results OK?Substitute a known-
good ECM and recheck.Repair ECM power or
ground circuit.
E01C01
3 4
18 19 5 6 7 10 11
17 20
47 46 49 50 51 21 22
5216 259
24 14
29
55 57 54 53 59
60 582
26 27 28 15
30
56 4832 31 34 35 36 37 40 42 39 38 44
45 43 41 331 12 13
238 3 4
18 19 5 6 7 10 11
17 20
47 46 49 50 51 21 22
5216 259
24 14
29
55 57 54 53 59
60 582
26 27 28 15
30
56 4832 31 34 35 36 37 40 42 39 38 44
45 43 41 331 12 13
238
3
461E01-29
C01-58
C01-15 C01-30
BLK/ORN
BLKBLK
5
RED/WHTGRN/WHT
GRN
RED
E01-30
C01-48
BLK/WHT
YEL/GRN
YEL/GRN
WHT
2 7
8 9WHT
WHT/BLU
BLKE01-31
I6RW0D110045-01
1. ECM 4. Main fuse box 7. “ST SIG” fuse
2. Starter motor 5. Starting motor control relay 8. “ST MOT” fuse
3. Ignition switch 6. “IG COIL” fuse 9. “IGN” fuse

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-141
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine.
4) Check DTC and pending DTC.
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.

DTC P0617: Starter Relay Circuit HighS6RW0D1104055
Wiring Diagram
Refer to “DTC P0616: Starter Relay Circuit Low”.
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and run it at idle for 3 min. or more.
4) Check DTC and pending DTC.DTC detecting condition Trouble area
Engine starts even though vehicle is at stop and engine starter signal is low voltage.
(2 driving cycle detection logic)• Engine starter signal circuit
•ECM
Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2Signal circuit check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors
connected.
3) Measure voltage at terminal “C01-48” of ECM connector,
under following condition.
Voltage at terminal “C01-48” of ECM connector
While engine cranking: 6 – 14 V
After starting engine: 0 – 1 V
Is each voltage within specified range?Poor “C01-48”
connection or
intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
If wire and connections
are OK, substitute a
known-good ECM and
recheck.“YEL/GRN” wire is open
or high resistance
circuit.
DTC detecting condition Trouble area
Engine starter signal is high voltage for 180 seconds while engine is running.
(2 driving cycle detection logic)• Engine starter signal circuit
•ECM

Downloaded from www.Manualslib.com manuals search engine 1A-142 Engine General Information and Diagnosis:
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.

Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2Starter signal check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors
connected.
3) Start engine, measure voltage between “C01-48”
terminal of ECM connector and vehicle body ground.
Is voltage 0 – 1 V?Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”. If OK, substitute a
known-good ECM and
recheck.Go to Step 3.
3Wire circuit check
1) Disconnect starting motor control relay in individual
circuit fuse box No.1 with ignition switch turned OFF.
2) Check for proper connection to starting motor control
relay at “RED/WHT”, “RED”, “WHT”, and “YEL/GRN”
wire terminals.
3) Disconnect connector from starting motor.
4) Measure voltage between “C01-48” terminal of ECM
connector and vehicle body ground with ignition switch
turned ON.
Is voltage 0 – 1 V?Go to Step 4. “YEL/GRN” wire is
shorted to power circuit.
If wires are OK,
substitute a known-
good ECM and recheck.
4Wire circuit check
1) Measure voltage between “RED/WHT” wire terminal of
starting motor control relay connector and vehicle body
ground with ignition switch turned ON.
Is voltage 0 – 1 V?Check starting motor
control relay. If OK,
substitute a known-
good ECM and recheck.Faulty ignition switch,
check ignition switch
referring to “Ignition
Switch Inspection in
Section 9C”.
If ignition switch is OK,
check for short circuit
between ignition switch
and starting motor
control relay to power
circuit.

Downloaded from www.Manualslib.com manuals search engine 1I-1 Starting System:
Engine
Starting System
Schematic and Routing Diagram
Cranking System Circuit DiagramS6RW0D1902001
Diagnostic Information and Procedures
Cranking System Symptom DiagnosisS6RW0D1904001
Possible symptoms due to starting system trouble would be as follows:
• Starting motor does not run (or runs slowly)
• Starting motor runs but fails to crank engine
• Abnormal noise is heard
Proper diagnosis must be made to determine exactly where the cause of each trouble lies in battery, wiring harness,
(including starting motor switch), starting motor or engine.
Do not remove motor just because starting motor does not run. Check the following items and narrow down scope of
possible causes.
1) Condition of trouble
2) Tightness of battery terminals (including ground cable connection on engine side) and starting motor terminals
3) Discharge of battery
4) Mounting of starting motor
I4RS0A190001-01
1. Pinion drive lever 6. Magnetic switch contacts 11. Ignition & Starter switch
2. Pinion & Over-running clutch 7. Pull-in coil 12. Battery
3. Magnetic switch 8. Starting motor 13. To ECM
4. Hold-in coil 9. Starting motor control relay
5. Plunger 10. A/T: Transmission range sensor (shift switch)