P1320

COMPONENT DESCRIPTION
Ignition coil & power transistor (Built into distributor) The ignition signal from the ECM is sent to and amplified by the power transistor. The power transistor turns on and off the ignition coil primary circuit. This on-off operation induces the proper high voltage in the coil secondary circuit.




ECM TERMINALS AND REFERENCE VALUE
Specification data are reference values and are measured between each terminal and (43) (ECCS ground).




ON BOARD DIAGNOSIS LOGIC




DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

NOTE: If both DTC P0340 (0101) and P1320 (0201) are displayed, perform TROUBLE DIAGNOSIS FOR DTC P0340 first.

With CONSULT
(1) Turn ignition switch "ON".
(2) Select "DATA MONITOR" mode with CONSULT.
(3) Start engine. (If engine does not run, turn ignition switch to "START" for at least 5 seconds.)

OR

With GST
(1) Turn ignition switch "ON".
(2) Start engine. (If engine does not run, turn ignition switch to "START" for at least 5 seconds.)
(3) Select MODE 7 with GST.

OR

NO TOOLS
(1) Turn ignition switch "ON".
(2) Start engine. (If engine does not run, turn ignition switch to "START" for at least 5 seconds.)
(3) Turn ignition switch "OFF", wait at least 7 seconds and then turn "ON".
(4) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.




WIRING DIAGRAM







DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION
Ignition coil
1. Disconnect ignition coil harness connector.
2. Remove distributor cap.







3. Check resistance as shown in the figure.

Terminal / Resistance [at 25°C (77°C)]
(7) - (8) / Less than 1 ohm
(7) - (9) 7 - 13 K Ohms

If NG, replace distributor assembly.

Power transistor
1. Disconnect camshaft position sensor & power transistor harness connector and ignition coil harness connector.




Terminals (2) and (8) / Resistance / Result
Except 0 Ohms / OK
0 Ohms / NG

2. Check power transistor resistance between terminals (2) and (8).
If NG, replace distributor assembly.

Resistor
1. Disconnect resistor harness connector.




2. Check resistance between terminals (1) and (2).

Resistance: Approximately 2.2 K Ohms

If NG, replace resistor.