BENDIX EC-60 ABS-ATC STD-PREM CONTROLLERS manual Miscellaneous Troubleshooting, ABS Indicator Lamp

Miscellaneous Troubleshooting

For all tests below, take all measurements at ECU harness connector pins in order to check wire harness and sensor. Probe the connector carefully so that the terminals are not damaged.

Stop Lamp Switch Test

1.With the service brake applied, measure the system voltage (9 to 17 VDC) stop lamp switch input to ECU.

TestMeasurement

Stop Lamp Switch to Ground 9 to 17 VDC

2.Apply and release service brake, does lamp extinguish?

3.Verify brake lamp switch is connected to ECU via hard wire or J1939.

4.With service brake released, check for presence of stop lamp bulb.

Dynamometer Test Mode (ATC Indicator Lamp Continuously Illuminated)

1.Clear the dynamometer test mode by depressing and releasing the blink code switch three times (or use an off-board diagnostic tool).

ABS Indicator Lamp

1.Verify diagnostic blink code switch is open when not activated.

Retarder Relay

1.Measure resistance between retarder disable output of EC-60™controller and voltage / ground.

Test	Measurement
Retarder disable to Voltage	Open Circuit (no continuity)
or Ground

2.Verify vehicle has retarder relay.

3.Verify proper wiring from ECU to retarder relay.

PMV Commons

1.Measure resistance between any common (PMV, TCV, and Diff.) and voltage or ground.

Test	Measurement
Any PMV, TCV, or Diff.	Open Circuit (no continuity)
Common to Voltage
or Ground

Differential Lock Solenoid

1.Measure resistance between Diff lock solenoid and voltage or ground.

TestMeasurement

Diff. Lock Solenoid to Voltage Open Circuit (no continuity) or Ground

Cab-mount ECU: Looking into wire harness connector

Connector	Pin	PMV Location
	4	TCV Common
X1	9	Stop Lamp Switch
18 Way	12	ABS WL Ground
	15	ABS WL Interlock
	17	Retarder
	18	ABS WL
	3	PMV Left Steer Axle Common
X2	6	PMV Right Steer Axle Common
18 Way	9	PMV Right Drive Axle Common
	12	PMV Left Drive Axle Common
	2	Diff Lock Solenoid
X3	3	Diff Lock Solenoid Common
15 Way	6	PMV Left Additional Axle Common
	9	PMV Right Additional Axle Common

Frame-mount ECU: Looking into wire harness connector

Connector	Pin	PMV Location
X1	10	Retarder
18 Way	12	ABS WL
	5	Stop Lamp Switch
X2	13	PMV Left Steer Axle Common
18 Way	14	PMV Right Steer Axle Common
	15	PMV Left Drive Axle Common
	16	PMV Right Drive Axle Common
	8	Diff. Lock Solenoid
X3	13	TCV Common
15 Way	14	Diff. Lock Solenoid Common
	15	PMV Left Additional Axle Common
	16	PMV Right Additional Axle Common

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