Suzuki 2000 Grand Vitara SQ625 Service Manual page 170

DTC TROUBLESHOOTING
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 TP Sensor Reference Voltage check:
(1) Wit ignition switch OFF, disconnect C30-3 coupler.
(2) Check voltage between C30-3 and ground.
Is voltage 4.5 – 5.5 V?
3 TP Sensor check:
1) Check TP sensor referring to "ENGINE AND
EMISSION CONTROL" section.
Is check result as specified?
Fig. for STEP 2
ACTION
ENGINE (H25 ENGINE) 6-1-59
YES
Go to Step 2.
Go to Step 3.
"R /G" wire open/
shorted to ground
circuit or power circuit
or poor C51-3-12
connection.
If OK, substitute a
known-good ECM
(PCM) and recheck.
NO
Go to "ENGINE
DIAG. FLOW
TABLE".
"Gr/R" wire open or
shorted to ground
circuit or power circuit
or poor C51-3-11
connection.
"Gr/Y" wire open or
poor C51-3-20
connection.
If OK, substitute a
known-good ECM
(PCM) and recheck.