62-11637 7–52
P00155 CHECK COOLANT TEMP SENSOR
• ACTIVATION: Engine Coolant Temperature Sensor (ENCT) is not within the range of -58 to +266°F (-50 to
+130°C).
• UNIT CONTROL: Pretrip will fail and display “PRETRIP FAIL AND COMPLETED”.
• RESET CONDITION: Auto reset if Pretrip is started again, or alarm may be manually reset using the dis-
play mounted keys or by turning the unit off, then back on again.
CORRECTIVE ACTIONS:
1. Check Sensor Operation
Refer to procedure for alarm 00129 CHECK ENG COOLANT SENSOR. Alarm condition must be cor-
rected and the alarm cleared to continue.
P00157 CHECK BATTERY CURRENT
• ACTIVATION: With all circuits off, current flow of more than +1.5 to -2.0 amps is detected in the 12 VDC
electrical circuits.
NOTE: If this alarm occurs, Pretrip Test #2 will be skipped and Pretrip Test #3 will start.
• UNIT CONTROL: Pretrip will fail and display “PRETRIP FAIL AND COMPLETED”.
• RESET CONDITION: Auto reset if Pretrip is started again, or alarm may be manually reset using the dis-
play mounted keys or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, clear the
alarm(s). (Refer to Note 1 in Notes Section, page 7-2.) Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1. Check DC Current Draw and Sensor
a. Observe current draw reading in unit data. Reading must be between +1.5 to -2.0 Amps.
b. Check power between 2MM-29 and 2MM-23 and between PCM-31 and PCM-30 5 VDC. If not,
check connectors and wiring between terminals for damage, moisture or corrosion.
c. Check for continuity from 2MM-12 to PCM-29. If good continuity not present, check connectors and
wiring between terminals for damage, moisture or corrosion.
2. Check Individual Circuits
Isolate individual circuits and test amp draw. Must be in range. (Refer to Section 2.10 for correct elec-
trical values.)
3. Check for Parasitic Loads
Check for electrical loads that are drawing current with all circuits OFF. Check for non-factory installed
devices such as lift gates, inside lights, satellite systems, etc. These devices must be wired so as to
not draw current during Pretrip testing.
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