Pinpoint Test 15: DTC P0AE1 - Hybrid Battery Precharge Contactor Circuit

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PINPOINT TEST 15: DTC P0AE1 - HYBRID BATTERY PRECHARGE CONTACTOR CIRCUIT

Normal Operation

When the ignition is turned on, the battery control module (BCM) makes various vehicle checks. If these checks are normal, the BCM sends a signal to the contactor to close, which will supply high-voltage power to the vehicle. If a precharge contactor overcurrent condition is sensed by the BCM, the stop safely hazard (red triangle) warning indicator is illuminated and the vehicle will shut down and/or not start.This DTC can set as a result of a discharged 12-volt battery, a fault on the DC/DC converter enable circuit, a fault on the high-voltage bus, the electronically controlled continuously variable transmission (ECVT) or the high-voltage wiring.

- DTC P0AE1 (Hybrid Battery Precharge Contactor Circuit) - If the precharge contactor attempts to close and current flow exceeds set values, DTC P0AE1 will set. This could indicate a short in the high-voltage system.

Possible Causes
- High-voltage cable assembly
- BCM
- High voltage traction battery (HVTB)
- ECVT

Diagnostic Procedure

WARNING:To prevent the risk of high-voltage shock, always follow precisely all warnings and service instructions, including instructions to depower the system. The high-voltage hybrid system utilizes approximately 300 volts DC, provided through high-voltage cables to its components and modules. The high-voltage cables and wiring are identified by orange harness tape or orange wire covering. All high-voltage components are marked with high-voltage warning labels with a high-voltage symbol. Failure to follow these instructions may result in serious personal injury or death.

CAUTION:Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

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