Complaints Table
If these complaints should occur, examine the marked test
steps more closely.
Complaints
Engine starts poorly or not at all
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Engine starts but stalls again
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Idle problems (engine speed, exhaust)
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Poor throttle response, transition problems
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Engine misfiring (ignition, injection)
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Engine output / top speed too low
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Fuel consumption too high
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Engine diesels
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Engine pings, knocks
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Engine overheats
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Engine stalls at traffic lights
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Telltale illuminates constantly or occasionally
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Possible causes
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Test step no. in
F0: DATA LIST
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·
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BATTERY VOLTAGE
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01
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·
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·
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TPS SIGNAL, SIM.
IDLE POS. SW and SIM.
FULL POS. SW
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02, 03, 04
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·
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INTAKE AIR TEMP.
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05
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COOLANT TEMP.
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06
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MASS AIR FLOW S.
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07
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KNOCK SIGNAL
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08
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IGN. / INJ. CUTOFF
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09
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HALL SENSOR
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10
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VEHICLE SPEED
and VEHICLE SP. PULSE
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11, 12
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A / C INFORMAT.
SW
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13
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A / C COMPRESS. SW
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14
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PARK /
NEUTRAL SW.
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15
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TORQUE CONTROL
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16
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IGN. COIL l+4 IGN.
COIL 2+5 and
IGN. COIL 3+6
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17, 19, 20
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ENGINE LOAD SIG. and TPS LOAD SIGNAL
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21, 22
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FUEL PUMP RELAY
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23
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A /
C CUTOFF RELAY
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24
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FUEL TANK VENT.
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25
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INT. MANIFOLD V. 1
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27
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INT. MANIFOLD V. 2
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28
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SEC.
AIR PUMP REL
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29
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EGR SOLENOID
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30
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Engine starts poorly or not at
all
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Engine starts but stalls again
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Idle problems (engine speed,
exhaust)
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Poor throttle response,
transition problems
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Engine misfiring (ignition,
injection)
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Engine output / top speed
too low
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Fuel consumption too high
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Engine diesels
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Engine pings, knocks
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Engine overheats
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Engine stalls at traffic lights
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Telltale illuminates constantly
or occasionally
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Possible causes
|
Test step no. in
F0: DATA LIST
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·
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EGR PULSE RATIO
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31
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EGR POS. FDBK
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32
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ENGINE TYPE
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33
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TRACTION CONTROL
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34
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TRANSM. CODING
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35
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ENGINE SP. PULSE
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36
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DESIRED IDLE
and ENGINE SPEED
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37, 38
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DESIRED AIR IDLE
and ACTUAL AIR IDLE
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39, 40
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IDLE AIR CONTROL
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41
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IAC ADAPT. SLOPE
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42
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IAC INTEGRATOR
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43
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IAC BLOCK LEARN
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44
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02 SENSOR LOOP 1,
02 SENSOR LOOP 2,
02 SENSOR 1 and
02 SENSOR 2
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45, 46.47, 48
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AIR /
FUEL RATIO 1,
AIR /
FUEL RATIO 2, 02 INTEGRATOR 1 and 02 INTEGRATOR 2
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49, 50, 51, 52
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02 BLM IDLE 1
and 02 BLM IDLE 2
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53, 54
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02 BLM PART 1
and 02 BLM PART 2
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55, 56
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SPARK ADVANCE
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57
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KNOCK RETARD
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58
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·
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·
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·
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INJECTION PULSE
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59
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CHECK LIGHT
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60
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DIAG. REQUEST
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61
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INJECTOR CUTOFF
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62
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Possible causes
|
Test step no.
in F5: ACTUATOR TEST
|
·
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·
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Ignition coil or circuit
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01, 02, 03
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Telltale
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04
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Idle speed adjuster
|
05
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Tank vent valve
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06
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AC cutoff relay
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07
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Intake manifold switchover valve 1 or 2
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08, 09
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Exhaust gas recirculation valve
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10
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Secondary air injection relay
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11
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Pick - ups / interference pulses
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-
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Control unit defective
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-
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