Toyota 1PZ Repair Manual page 24

ENGINE MECHANICAL - Troubleshooting (Diesel Engine Diagnosis)
(Possible Cause)
1. ENGINE COOLANT
TEMPERATURE TOO LOW
2. IMPROPER INJECTION TIMING
3. FAULTY INJECTION NOZZLES
(Possible Cause)
BINDING ACCELERATOR CABLE
(Possible Cause)
IMPROPER FUEL CUT SOLENOID
OPERATION
ENGINE NOISE WHEN WARM
(Cranking Noise with Excessive Vibration)
ENGINE WILL NOT RETURN TO IDLE
ENGINE WILL NOT SHUT OFF WITH KEY
(Check Procedure and Correction Method)
Check coolant temperature with coolant temperature
gauge.
If not sufficiently warm, thermostat is faulty and
should be replaced.
Refer to step 7 of ENGINE CRANKS NORMALLY
BUT WILL NOT START.
Refer to step 9 of ENGINE CRANKS NORMALLY
BUT WILL NOT START.
(Check Procedure and Correction Method)
Operate adjusting lever on top of injection pump,
and check if engine returns to idle. (See page
EM-27)
If so, accelerator cable is binding or improperly ad-
justed and should be repaired accordingly.
If engine does not return to idle, injection pump is
faulty and should be replaced.
(Check Procedure and Correction Method)
Disconnect connector of fuel cut solenoid, and
check if engine stops.
If so, starter switch is faulty and should be repaired
as necessary or replaced.
If engine does not stop, either fuel cut solenoid is
faulty or there is interference by foreign particles.
Repair as necessary.
EM-13