The heater-A/C control receives a LH electric actuator position signal from the LH electric actuator. The LH electric actuator position sensor is a potentiometer that is tied to a 5V source through circuit 1217 (PNK/BLK) band to ground through circuit 61(YEL), both from the heater-A/C control. The variable output from the potentiometer feeds back a position signal through circuit 1218 (BRN/WHT) to a pull-up resistor in the heater-A/C control. This signal relates to the position of the LH electric actuator. This signal is used to determine the necessary drive signal to the LH electric actuator motor to provide the proper air mix door position.
The heater-A/C control performs an internal check on the LH electric actuator position and determines that circuit 1218 (BRN/WHT) is open.
The heater-A/C control stores DTC B0363 in memory.
• | An open is no longer present in circuit 1218 (BRN/WHT). |
• | Under all fault conditions, the ignition switch must be cycled from on to off, back to on before this DTC can change from current to history. |
• | A history DTC will clear after 100 drive cycles if the condition for this malfunction is no longer present. |
• | Using a scan tool. |
Check for an open in circuit 61 (YEL) or 1218 (BRN/WHT). An open in these circuit may cause this DTC to set.
The number(s) below refer to the step number(s) on the diagnostic table.
This test checks if the heater-A/C control 5V supply is getting through circuit 1218 (BRN/WHT) .
This test checks if the heater-A/C control ground is getting through circuit 61 (YEL).
Step | Action | Value(s) | Yes | No |
---|---|---|---|---|
1 | Was the heater-A/C control diagnostic system check performed? | -- | Go to Step 2 | Go to Diagnostic System Check |
2 | Check for DTC B0361. Refer to DTC Table . Is DTC B0361 also set as a current or history DTC in the heater-A/C control? | -- | Go to Step 3 | |
Is the measured voltage within the specified range? | 4.5-5.5V | Go to Step 4 | Go to Step 6 | |
Use a DMM to measure the voltage between the LH electric actuator harness connector terminal 7 and terminal 9. Is the measured voltage within the specified range? | 4.5-5.5V | Go to Step 5 | Go to Step 7 | |
5 | Replace the LH electric actuator. Refer to Temperature Actuator Replacement (LH (Driver)) . Is the repair complete? | -- | System OK | -- |
6 |
Is the repair complete? | -- | System OK | -- |
7 |
Is the repair complete? | -- | System OK | -- |