PRE-HEATING SYSTEM ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

PROCEDURE

1. INSPECT ILLUMINATION TIME OF GLOW INDICATOR LIGHT

   1. Turn the ignition switch to ON and measure the length of time that the light remains illuminated.

      

      *a

      Engine Coolant Temperature

      *b

      Second

      Light Illumination Time

      Refer to the graph and the table

      Light Illumination Duration

      Engine Coolant Temperature °C (°F)	Light illumination Time (sec.)
      -20 (-4)	10 to 12
      -15 (5)	6.0 to 7.2
      15 (59)	0.46 to 2.4
      32 (90.6)	0.46

      If the result is not as specified, check the ECM, engine coolant temperature sensor, glow plug assembly and glow relay.

2. INSPECT PRE-HEATING

   1. Turn the ignition switch to ON and measure the length of time that battery voltage is applied to the glow plug assembly.

      Pre-heating Time

      Engine Coolant Temperature °C (°F)	Pre-heating Time
      40 (104) or more	1 sec.
      40 (104) or lower	Refer to the graph*1 (15 sec. at the longest)

      

      *a	Battery Voltage (V)	*b	Second
      *c	Pre-heating Time (second)	-	-

      *1: Pre-heating time changes depending on the battery voltage.

      If the result is not as specified, check the ECM, engine coolant temperature sensor, glow plug assembly and glow relay.

3. INSPECT AFTER GLOW TIME

   1. Remove the glow relay.

   2. 

      *a	Front view of wire harness connector (to Glow Relay)

      After the engine starts, measure the length of time that battery voltage remains present.

      After Glow Time

      Tester Connection	Condition	Specified Condition
      A55-2 - Body ground	Always	Refer to the graph below

      

      *a	Engine Coolant Temperature	*b	Second
      *c	After Glow Time	-	-

      If the result is not as specified, check the ECM, engine coolant temperature sensor, glow plug assembly and glow relay.