Diagnostic Trouble Code Chart

If a trouble code is displayed during the DTC check, check the trouble areas listed for that code in the table below and proceed to the appropriate page.

NOTE:

When the distance control ECU and/or ECM are replaced with a new one, initialization must be performed.
When the millimeter wave radar sensor is replaced with a new one, adjustment of the radar sensor beam axis must be performed.

Dynamic radar cruise control system

DIAGNOSTIC TROUBLE CODE CHART

DTC Code	Detection Item	Trouble Area
P0500	Vehicle Speed Sensor Malfunction	Vehicle speed sensor Vehicle speed sensor signal circuit Combination meter assembly ECM
P0503	Vehicle Speed Sensor "A" Intermittent / Erratic / High	Vehicle speed sensor Vehicle speed sensor signal circuit Combination meter assembly ECM
P0571	Brake Switch "A" Circuit	Stop light switch Stop light switch circuit ECM
P0607	Control Module Performance	ECM (This DTC indicates malfunction in ECM. When this DTC is output, it is necessary to replace ECM)
P1570	Radar Sensor Malfunction	Millimeter wave radar sensor
P1572	Improper Aiming of Radar Sensor Beam Axis	Millimeter wave radar sensor
P1575	Warning Buzzer Malfunction	Skid control buzzer Skid control buzzer circuit ABS & traction actuator (Skid control ECU)
P1578	Brake System Malfunction	VSC system
P1615	Communication Error from Distance Control ECU to ECM	Communication circuit Distance control ECU ECM
P1616	Communication Error from ECM to Distance Control ECU	Communication circuit Distance control ECU ECM
P1617	Distance Control ECU Malfunction	Distance control ECU
P1630	Communication Error from VSC to ECM	Communication circuit ABS & traction actuator (Skid control ECU) ECM
P1631	Communication Error from ECM to VSC	Communication circuit ECM ABS & traction actuator (Skid control ECU)
U0100	Lost Communication with ECM/ PCM "A"	Communication circuit ECM Distance control ECU
U0100	Lost Communication with ECM/ PCM "A"	Communication circuit ECM ABS & traction actuator (Skid control ECU)
U0122	Lost Communication with Vehicle Dynamics Control Module	Communication circuit ABS & traction actuator (Skid control ECU) ECM
U0123	Communication Error of Yaw Rate Sensor	Communication circuit Yaw rate sensor Distance control ECU ECM
U0126	Lost Communication with Steering Angle Sensor Module	Communication circuit Steering angle sensor Distance control ECU ECM
U0235	Lost Communication with Cruise Control Front Distance Range Sensor	Communication circuit Millimeter wave radar sensor Distance control ECU
U1101	Lost Communication with Distance Control ECU	Communication circuit Distance control ECU ECM
U1102	Lost Communication with Radar Sensor	Communication circuit Millimeter wave radar sensor Distance control ECU