DTC 01-DF: Master Error (To 08/2009): Procedure

HINT: 

Refer to Radio Receiver Power Source Circuit. Refer to Radio Receiver Power Source Circuit .

If the power source circuit is operating normally, proceed to 2 the next step.

NEXT: Go to next step 

1. Disconnect the radio receiver assembly connectors.
   Fig 1: Identifying Radio Receiver Assembly Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G7-5 (ATX+) - G7-15 (ATX-)	Always	60 to 80 Ω
   G11-9 (TXM+) - G11-10 (TXM-)	Always	60 to 80 Ω
   G9-9 (TX+) - G9-10 (TX-)	Always	60 to 80 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Radio Receiver Assembly)
   *2	Component without harness connected (Radio Receiver Assembly)
   *3	Component without harness connected (Radio Receiver Assembly)

NG → See step   9 

OK: Go to next step 

1. Enter diagnostic mode.
   Fig 2: Service Check Mode Flow Chart - Diagnostic Mode

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Press preset switch "2" to change the mode to "Detailed Information Mode".
3. Identify the component which has stored this code.
   COMPONENT TABLE
   
   

   Component	Physical Address
   Stereo component amplifier assembly	440
   Satellite radio tuner	1F1
   Radio receiver assembly	190
   Accessory meter assembly	1D4
   Multi-media interface ECU	388
   Air conditioning control panel	1C4

   HINT: 

   • "P440" set by the stereo component amplifier assembly is shown in the preceding illustration as an example.
   • For details of the DTC display, refer to DTC Check/Clear. Refer to DTC CHECK / CLEAR .

NEXT: Go to next step 

1. Select the component shown by the sub-code.

   HINT: 

   The satellite radio tuner is built into the radio receiver assembly. If there is a problem between the satellite radio tuner and radio receiver assembly, replace the radio receiver assembly.

   COMPONENT TABLE
   
   

   Component	Proceed to
   Except satellite radio tuner	A
   Satellite radio tuner (1F1)	B

B → See step   9 

A: Go to next step 

HINT: 

For details of the connectors, refer to Terminal Connector Identification. Refer to TERMINAL CONNECTOR IDENTIFICATION .

1. Referring to the following AVC-LAN wiring diagram, check the AVC-LAN circuit between the radio receiver assembly and component which has stored this code.
   1. Disconnect all connectors between the radio receiver assembly and component which has stored this code.
   2. Check for an open or short in the AVC-LAN circuit between the radio receiver assembly and component which has stored this code.

      OK

      There is no open or short circuit.

      Fig 3: Identifying AVC-LAN Wiring Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the radio receiver assembly with a known good one.

NEXT: Go to next step 

1. Clear the DTCs. Refer to DTC CHECK / CLEAR .

NEXT: Go to next step 

1. Recheck for DTCs and check if the same problem occurs again.

   OK

   Malfunction disappears.

NG → REPLACE COMPONENT WHICH HAS STORED THIS CODE 

OK → END