Pinpoint Tests AE: The Hazard Warning Indicator Is Inoperative
Instrumentation, Message Center and Warning Chimes
Pinpoint Tests
Pinpoint Test AE: The Hazard Warning Indicator Is Inoperative (Hybrid)
Normal Operation
The hazard warning indicator informs the driver that service on the vehicle is required. The input to the Instrument Cluster (IC) is from a message over the High Speed Controller Area Network (HS-CAN) communication network from the PCM, the Transmission Control Module (TCM) and the Battery Control Module (BCM).
If the hazard warning status message is missing or if the data is deemed invalid by the IC for more than 5 seconds, the IC sets DTC U0100 in continuous memory. If the transaxle status message is missing or if the data is deemed invalid by the IC for more than 5 seconds, the IC sets DTC U0101 in continuous memory. If the traction battery status message is missing or if the data is deemed invalid by the IC for more than 5 seconds, the IC sets DTC U0111 in continuous memory.
If any one of the three messages are missing with the other two valid, the IC defaults the hazard warning indicator to the last observable state (on or off). If all three messages are missing and the IC does not see an ignition switch transition into RUN/START, the IC defaults the hazard warning indicator to the last observable state (on or off). If all three messages are missing during an ignition switch transition into RUN/START, the IC defaults the hazard warning indicator on.
This pinpoint test is intended to diagnose the following:
- Powertrain concern
- Traction battery concern
- Transaxle concern
- IC
PINPOINT TEST AE: THE HAZARD WARNING INDICATOR IS INOPERATIVE (HYBRID)
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AE1 RETRIEVE THE RECORDED DTCs FROM THE PCM KOEO SELF-TEST
- Check for recorded PCM DTCs from the Key ON Engine OFF (KOEO) self-test.
- Are any PCM DTCs recorded?
Yes
REFER to Computers and Control Systems Information.
No
GO to AE2.
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AE2 RETRIEVE THE RECORDED DTCs FROM THE TCM SELF-TESTS
- Check for recorded TCM DTCs from the continuous and on-demand self-tests.
- Are any TCM DTCs recorded?
Yes
REFER to Computers and Control Systems Information.
No
GO to AE3.
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AE3 RETRIEVE THE RECORDED DTCs FROM THE BCM SELF-TEST
- Check for recorded BCM DTCs from the continuous and on-demand self-tests.
- Are any BCM DTCs recorded?
Yes
REFER to Body Control Systems.
No
GO to AE4.
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AE4 CARRY OUT THE IC INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger .
- Select the IC all lamps (HEV_HAZ_LMP) active command. Command all the lamps on and off. Observe the hazard warning indicator.
- Does the hazard warning indicator illuminate when commanded on and turn off when commanded off?
Yes
GO to AE5.
No
INSTALL a new IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). TEST the system for normal operation.
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AE5 RETRIEVE THE RECORDED DTCs FROM THE IC SELF-TEST
- Check for recorded IC DTCs from the self-test.
- Are any IC DTCs recorded?
Yes
For DTC U0100, GO to Pinpoint Test AU. Pinpoint Tests AU: DTC U0100
For DTC U0101, GO to Pinpoint Test AV. Pinpoint Tests AV: DTC U0101
For DTC U0111, GO to Pinpoint Test AW. Pinpoint Tests AW: DTC U0111
For DTC B1318, GO to Pinpoint Test AS. Pinpoint Tests AS: DTC B1318
No
INSTALL a new IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). TEST the system for normal operation.
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