Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA20034 RUNNER 2WD V6-4.0L (1GR-FE)REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONDIAGNOSTIC TROUBLE CODE DESCRIPTIONSRADIO, STEREO, AND COMPACT DISC
2003 Toyota 4 Runner 2WD V6-4.0L (1GR-FE)
Radio, Stereo, and Compact Disc
2003 Toyota 4 Runner 2WD V6-4.0L (1GR-FE)SECTION Radio, Stereo, and Compact Disc
DIAGNOSTIC TROUBLE CODE CHARTS
RADIO RECEIVER ASSY (PIONEER MADE) (Physical address: 190)
* 1 Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine.
* 2 It is stored when 180 sec. has passed after the power supply connector is pulled out after engine start.
* 3 It may be stored when the engine key is turned 1 min. after engine start.
* 4 It may be stored when the engine key is turned again after engine start.
* 5 When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.
STEREO COMPONENT AMPLIFIER ASSY (Physical address: 440)
* 1 Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine.
* 2 This code be stored when the engine key is turned again 1 min. after engine start.
* 3 This code may be stored when the engine key is turned again after engine start.
* 4 When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.
STEREO COMPONENT CONTROLLER ASSY
* 1 Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine.
* 2 This code be stored when the engine key is turned again 1 min. after engine start.
* 3 This code may be stored when the engine key is turned again after engine start.
* 4 When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.
Logical Address: 01 (Communication Control) 1 Of 2:
Logical Address: 01 (Communication Control) 2 Of 2:
Logical Address: 61 (Cassette Switch):
Logical Address: 62 (CD Player):
RADIO RECEIVER ASSY (PIONEER MADE) (Physical address: 190)
* 1 Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine.
* 2 It is stored when 180 sec. has passed after the power supply connector is pulled out after engine start.
* 3 It may be stored when the engine key is turned 1 min. after engine start.
* 4 It may be stored when the engine key is turned again after engine start.
* 5 When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.
Logical Address: 01 (Communication Control) 1 Of 2:
Logical Address: 01 (Communication Control) 2 Of 2:
STEREO COMPONENT AMPLIFIER ASSY (Physical address: 440)
* 1 Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine.
* 2 This code be stored when the engine key is turned again 1 min. after engine start.
* 3 This code may be stored when the engine key is turned again after engine start.
* 4 When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.
Logical Address: 01 (Communication Control) 1 Of 2:
Logical Address: 01 (Communication Control) 2 Of 2:
STEREO COMPONENT CONTROLLER ASSY
* 1 Even if no failure is detected, this code may be stored depending on the battery condition or voltage for starting an engine.
* 2 This code be stored when the engine key is turned again 1 min. after engine start.
* 3 This code may be stored when the engine key is turned again after engine start.
* 4 When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition switch in ACC or ON, this code is stored.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.