0232-03 5 Volt Supply voltage high (21)
产生此代码的情况:
发动机控制模块（ECM）检测到以下情况：
- 5 伏电源持续一秒以上高于 5.16 VDC。
- ECM 至少已通电三秒钟。
系统响应:
ECM 将记录诊断代码并触发快照。 在此诊断代码处于激活状态期间将显示 "DIAG"。 ECM 会将所有压力传感器设为下述缺省值：
- 冷却液温度 90 °C (194 °F)
- 燃油温度 30 °C (86 °F)
- 进气歧管空气温度 85 °C (185 °F)
- 发动机机油压力 603 kPa (87 psi)
- 大气压力 100 kPa (15 psi)
- 增压压力 0 kPa (0 psi)
- 冷却液液位 "OK（正常）"
- 户外空气温度 65 °C (149 °F)
该故障诊断代码为激活状态时，发动机功率将偏低。
测试步骤 1. 进行以下的诊断步骤: 5 V 发动机压力传感器电源电路 - 测试
结果:
- 正常 - 停止
Caterpillar Information System:
SCJ and 8SC Series Alternators Regulator - Test
C7 Marine Engine Fuel System
3512B and 3516B High Displacement Locomotive Engines Product Lifting
SCJ and 8SC Series Alternators Diode Assembly - Test
3406E, C-10 and C-12 On-highway Engines 0244-02 Event Recorder Data Lost (02)
C15 and C18 Engines for Caterpillar Built Machines Vibration Damper - Check
C7 Marine Engine Engine Oil Pressure - Test
C9 Urban Transit Bus Engine Exhaust Manifold
C7 and C9 On-Highway Engines Dedicated PTO Parameters
C9 Urban Transit Bus Engine Turbocharger
3406E, C-10 and C-12 On-highway Engines 0174-04 Fuel Temperature voltage low (13)
C9 Urban Transit Bus Engine Engine Oil Filter Base
3508B, 3512B, and 3516B High Displacement Generator Sets Product Storage
3406E, C-10 and C-12 On-highway Engines 0232-04 5 Volt Supply voltage low (21)
3406E, C-10 and C-12 On-highway Engines 0253-11 Check Transmission Customer Parameters (56)
C7 Marine Engine Engine Design
C-10 Petroleum Engine Engine Crankcase Breather - Clean
C7 and C9 On-Highway Engines Timer Parameters
3406E, C-10 and C-12 On-highway Engines 0254-12 ECM Fault (53)
SCJ and 8SC Series Alternators Residual Magnetism - Restore
SCJ and 8SC Series Alternators Brush Assembly - Test
SCJ and 8SC Series Alternators Brush Length - Check
C11 and C13 Engines Cylinder Head Valves
C-10 Petroleum Engine Engine Oil Level - Check