C1237

C1237: High System Voltage







CIRCUIT DESCRIPTION
This circuit is used to monitor voltage level available to EBCM. If voltage rises above a certain level, damage to system may occur.

CONDITIONS FOR SETTING THE DTC
DTC C1237 can only be set if vehicles speed is greater than 8 kph (5 mph), if voltage supplied to terminals E136-1 and/or E136-2 is greater than 17 volts for 1 second.

ACTION TAKEN WHEN THE DTC SETS
^ ABS relay opens, removing voltage from solenoids and pump motor.
^ DTC C1237 is stored.
^ ABS disabled, ABS warning light turns on.

DIAGNOSTIC AIDS
Typical causes for DTC C1237 to set.
^ Charging system malfunction.
^ Poor connection.
^ EBCM malfunction.

INSPECTION





NOTE: Diagnostic flow table mast be performed first before china this table.
Type 1