Suzuki 2000 Grand Vitara SQ625 Service Manual page 204

DTC CONFIRMATION PROCEDURE
NOTE:
Check to make sure that following conditions are satisfied when using this DTC CONFIRMATION PROCE-
DURE.
D Intake air temperature: between –14 C and 70 C (6.8 F and 158 F)
D Atmospheric pressure: higher than 560 mmHg (Altitude: lower than 2790 m (9150 ft))
D Following DTC is not detected: P0335
(1) With ignition switch OFF, connect scan tool.
(2) Turn ON ignition switch and clear DTC by using scan tool if any.
(3) Crank engine for 8 sec.
(4) Check DTC by using scan tool.
DTC TROUBLESHOOTING
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 Is engine cranked?
3 Engine Start Signal check:
(1) Check engine start signal circuit referring to
"DTC P1500" in this section.
Is the result satisfactory?
4 CMP Sensor Power Supply Voltage check:
(1) With ignition switch OFF, disconnect CMP sensor
coupler (1).
(2) With ignition switch ON, check voltage between
C09-2 and C09-1 terminal.
Is the voltage 10 – 14 V?
5 CMP Sensor (REF) Signal check:
(1) With ignition switch OFF, connect CMP sensor
coupler (1).
(2) Disconnect couplers from ignition coil assembly
and fuel injectors.
(3) With ignition switch ON and crankshaft turned
slowly, check voltage between C51-3-10 and
C51-3-21.
Does voltmeter indicator deflect between 0 – 1 V and
4 – 6 V 6 times while crankshaft turned two revolutions?
6 CMP Sensor (POS) Signal check:
(1) With ignition switch ON and crankshaft turned
slowly, check voltage between C51-3-9 and
C51-3-21.
Does voltmeter indicator deflect between 0 – 1 V and
4 – 6 V?
ACTION
ENGINE (H25 ENGINE) 6-1-93
YES
Go to Step 2.
Go to Step 3.
Go to Step 4.
Go to Step 5.
Go to Step 6.
Poor C51-3-9 and/or
C51-3-10 terminal of
ECM (PCM) coupler
connection.
If OK, substitute a
known-good ECM
(PCM) and recheck.
NO
Go to "ENGINE
DIAG. FLOW
TABLE".
Go to "CRANKING
SYSTEM" section.
Repair or replace.
Faulty "Bl/B" wire
and/or "Gr/Y" wire.
Faulty "Y/Bl" wire
or CMP sensor.
If OK, substitute a
known-good ECM
(PCM) and recheck.
Faulty "Y/G" wire or
CMP sensor.
If OK, substitute a
known-good ECM
(PCM) and recheck.