DTC C0110 Pump Motor Circuit Malfunction. Pontiac Grand Prix 1998

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 1998 🢒 Grand Prix 🢒 DTC 🢒 DTC C0110 Pump Motor Circuit Malfunction

Circuit Description

The pump motor is an integral part of the BPMV, while the pump motor relay is integral to the EBTCM. The pump motor relay is not engaged during normal system operation. When ABS or TCS operation is required, the EBTCM activates the pump motor relay and battery power is provided to the pump motor.

Conditions for Setting the DTC

•	Pump motor voltage is not present 60 milliseconds after activation of the pump motor relay.

•	Pump motor voltage is present for more than 2.5 seconds with no activation of the pump motor relay.

•	Pump motor voltage is not present for at least 40 milliseconds after the pump motor relay is commanded off.

Action Taken When the DTC Sets

•	A malfunction DTC stores.

•	The ABS/TCS disables.

•	The amber ABS/TCS indicator(s) turn on.

Conditions for Clearing the DTC

•	The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.

•	100 ignition cycles pass with no DTC(s) detected.

Diagnostic Aids

•	It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.

•	Thoroughly inspect any circuitry that may be causing the complaint for the following conditions:

-	Backed out terminals

-	Improper mating

-	Broken locks

-	Improperly formed or damaged terminals

-	Poor terminal-to-wiring connections

-	Physical damage to the wiring harness

•	The following conditions may cause an intermittent malfunction:

-	A poor connection

-	Rubbed-through wire insulation

-	A broken wire inside the insulation

•	If an intermittent malfunction exists refer to Intermittents and Poor Connections Diagnosis in Wiring Systems for further diagnosis.

A disconnected pump motor connector will cause this malfunction.

Test Description

The numbers below refer to step numbers on the diagnostic table.

This step checks for a short to ground in CKT 102.

This step checks for an open in CKT 102.

This step checks for a mechanical malfunction with the pump motor, and also cleans the motor contacts for the measurement in step 15.

DTC C0110 Pump Motor Circuit Malfunction

Step	Action	Value(s)	Yes	No
1	Was the Diagnostic System Check performed?	--	Go to Step 2	Go to Diagnostic System Check
2	Inspect the fusible link supplying voltage to CKT 102. Is the fusible link OK?	--	Go to Step 7	Go to Step 3
3	Install a new fusible link. Turn the ignition switch from the OFF to RUN position, engine OFF. Using a scan tool in ABS/TCS Special Functions attempt to run the AUTOMATED test. Recheck the fusible link. Is the fusible link OK?	--	Go to Step 16	Go to Step 4
4	Turn the Ignition switch to the OFF position. Disconnect the fusible link from the starter. Disconnect the EBTCM connector C1. Connect the J 39700 Universal Pinout Box using the J 39700-530 cable adapter to the EBTCM harness connector only. Using J 39200 DMM, measure the resistance between terminals 13 and 15 of J 39700 . Is the resistance within the range specified in the value(s) column?	OL (infinite)	Go to Step 5	Go to Step 12
5	Disconnect the EBTCM pump motor connector C2. Connect a 10A fused jumper wire between the pump motor connector C2 terminal 1 and battery voltage. Connect a jumper wire between the pump motor connector C2 terminal 2 and ground. Only attempt to run the pump motor for 5 seconds. Disconnect the jumper wires. Inspect the 10A fuse in the jumper wire. Is the fuse OK?	--	Go to Step 11	Go to Step 6
6	Replace the BPMV. Refer to Brake Pressure Modulator Valve Replacement . Is the replacement complete?	--	Go to Step 16	--
7	Turn the Ignition switch to the OFF position. Disconnect the EBTCM connector C1. Connect J 39700 Universal Pinout Box using the J 39700-530 cable adaptor to the EBTCM harness connector C1 only. Using J 39200 DMM, measure the resistance between terminals 12 and 15 of J 39700 . Is the resistance within the range specified in the value(s) column?	0-5 ohms	Go to Step 9	Go to Step 8
8	Repair CKT 250 for an open or high resistance. Refer to Wiring Repairs in Wiring Systems. Is the repair complete?	--	Go to Step 16	--
9	Reconnect the fusible link to the starter if disconnected. Using J 39200 DMM, measure the voltage between the starter and a good ground. Is the voltage within the range specified in the value(s) column?	Battery volts	Go to Step 10	Go to Power Distribution Schematics in Wiring Systems
10	Using J 39200 DMM, measure the voltage at terminal 13 of J 39700 . Is the voltage within the range specified in the value(s) column?	Battery volts	Go to Step 14	Go to Step 13
11	Replace EBTCM. Refer to Electronic Brake and Traction Control Module Replacement . Is the replacement complete?	--	Go to Diagnostic System Check	--
12	Repair short to ground in CKT 102. Refer to Wiring Repairs in Wiring Systems. Is the repair complete?	--	Go to Step 16	--
13	Repair open in CKT 102. Refer to Wiring Repairs in Wiring Systems. Is the repair complete?	--	Go to Step 16	--
14	Disconnect the EBTCM pump motor connector C2. Connect a 10A fused jumper wire between the pump motor connector C2 terminal 1 and battery voltage. Connect a jumper wire between the pump motor connector C2 terminal 2 and ground. Only attempt to run the pump motor for 5 seconds. Disconnect the jumper wires. Inspect the 10A fuse in the jumper wire. Is the fuse OK?	--	Go to Step 15	Go to Step 6
15	Zero the J 39200 DMM leads. Using J 39200 DMM, measure the resistance between terminals 1 and 2 of the pump motor connector C2. Is the resistance within the range specified in the value(s) column?	0-4 ohms	Go to Step 11	Go to Step 6
16	Reconnect all previously disconnected components. Using a scan tool clear the DTC. Remove the scan tool from the DLC. Carefully drive the vehicle above 12 Km/h (8 mph) for several minutes. Does the DTC reset as a current DTC?	--	Go to Step 2	Go to Diagnostic System Check