Code 6 - Power Transistor Error

WARNING: This page is about a different car, the 2006 Suzuki Verona. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Code 6 - Power Transistor Error Circuit Diagram

Courtesy of SUZUKI OF AMERICA CORP.

STEP ACTION VALUE CHART

Step	Action	Value (s)	Yes	No
1	Disconnect the ATC controller connectors A and B. Disconnect the connectors from the power transistor. Measure the resistance circuit GRY/BLK from terminal 4 of the power transistor to terminal B1 of the ATC controller. Does the resistance equal the specified value?	≈ 0 Ω	Go to Step 2	Go to Step 6
2	Measure the resistance in the circuit from terminal 1 of the power module control unit to terminal B12 of the ATC controller. Does the resistance equal the specified value?	≈ 0 Ω	Go to Step 3	Go to Step 6
3	Reconnect the wiring harness to the ATC controller and to the power module control unit. Turn the ignition switch to ON. Measure the voltage from ground to terminal B12 of the ATC controller. Cycle the fan speed controller manually from the lowest (speed 1) to the highest (speed 5). Do the voltages measured match approximately the specified values within ± 0.5 V?	1: 8.8 V 2: 6.8 V 3: 4.4 V 4: 2.7 V 5: 0 V	Go to Step 4	Go to Step 5
4	Replace the ATC controller. Is the repair complete?	-	System OK	-
5	Measure the resistance in circuit PNK between terminal 6 of the power transistor and the blower motor terminal 1. Does the resistance equal the specified value?	≈ 0 Ω	Go to Step 7	Go to Step 6
6	Repair or replace the wiring harness for the circuit PNK. Is the repair complete?	-	System OK	-
7	Check the wiring harness of the motor and power supply. Check the blower relay. Check fuse Ef6. Is there any problem in the wiring, the relay, or the fuse?	-	Go to Step 9	Go to Step 8
8	Replace the power transistor. Is the repair complete?	-	System OK	-
9	Repair or replace the wiring harness, the relay, or the fuse as required. Is the repair complete?	-	System OK	-